Auto merge of #84840 - Dylan-DPC:rollup-uzk7w0h, r=Dylan-DPC

Rollup of 6 pull requests

Successful merges:

 - #84072 (Allow setting `target_family` to multiple values, and implement `target_family="wasm"`)
 - #84744 (Add ErrorKind::OutOfMemory)
 - #84784 (Add help message to suggest const for unused type param)
 - #84811 (RustDoc: Fix bounds linking trait.Foo instead of traitalias.Foo)
 - #84818 (suggestion for unit enum variant when matched with a patern)
 - #84832 (Do not print visibility in external traits)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

compiler/rustc_resolve/src/late/diagnostics.rs

@@ -819,6 +819,19 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
             _ => false,
         };
 
+        let find_span = |source: &PathSource<'_>, err: &mut DiagnosticBuilder<'_>| {
+            match source {
+                PathSource::Expr(Some(Expr { span, kind: ExprKind::Call(_, _), .. }))
+                | PathSource::TupleStruct(span, _) => {
+                    // We want the main underline to cover the suggested code as well for
+                    // cleaner output.
+                    err.set_span(*span);
+                    *span
+                }
+                _ => span,
+            }
+        };
+
         let mut bad_struct_syntax_suggestion = |def_id: DefId| {
             let (followed_by_brace, closing_brace) = self.followed_by_brace(span);
 
@@ -862,18 +875,7 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
                     }
                 }
                 PathSource::Expr(_) | PathSource::TupleStruct(..) | PathSource::Pat => {
-                    let span = match &source {
+                    let span = find_span(&source, err);
-                        PathSource::Expr(Some(Expr {
-                            span, kind: ExprKind::Call(_, _), ..
-                        }))
-                        | PathSource::TupleStruct(span, _) => {
-                            // We want the main underline to cover the suggested code as well for
-                            // cleaner output.
-                            err.set_span(*span);
-                            *span
-                        }
-                        _ => span,
-                    };
                     if let Some(span) = self.def_span(def_id) {
                         err.span_label(span, &format!("`{}` defined here", path_str));
                     }
@@ -1047,6 +1049,23 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
             ) if ns == ValueNS => {
                 bad_struct_syntax_suggestion(def_id);
             }
+            (Res::Def(DefKind::Ctor(_, CtorKind::Const), def_id), _) if ns == ValueNS => {
+                match source {
+                    PathSource::Expr(_) | PathSource::TupleStruct(..) | PathSource::Pat => {
+                        let span = find_span(&source, err);
+                        if let Some(span) = self.def_span(def_id) {
+                            err.span_label(span, &format!("`{}` defined here", path_str));
+                        }
+                        err.span_suggestion(
+                            span,
+                            &format!("use this syntax instead"),
+                            format!("{path_str}"),
+                            Applicability::MaybeIncorrect,
+                        );
+                    }
+                    _ => return false,
+                }
+            }
             (Res::Def(DefKind::Ctor(_, CtorKind::Fn), def_id), _) if ns == ValueNS => {
                 if let Some(span) = self.def_span(def_id) {
                     err.span_label(span, &format!("`{}` defined here", path_str));

compiler/rustc_session/src/config.rs

@@ -816,7 +816,7 @@ fn default_configuration(sess: &Session) -> CrateConfig {
     ret.reserve(6); // the minimum number of insertions
     // Target bindings.
     ret.insert((sym::target_os, Some(Symbol::intern(os))));
-    if let Some(ref fam) = sess.target.os_family {
+    for fam in &sess.target.families {
         ret.insert((sym::target_family, Some(Symbol::intern(fam))));
         if fam == "windows" {
             ret.insert((sym::windows, None));

compiler/rustc_target/src/spec/apple_base.rs

@@ -23,7 +23,7 @@ pub fn opts(os: &str) -> TargetOptions {
         function_sections: false,
         dynamic_linking: true,
         executables: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         is_like_osx: true,
         dwarf_version: Some(2),
         has_rpath: true,

compiler/rustc_target/src/spec/dragonfly_base.rs

@@ -5,7 +5,7 @@ pub fn opts() -> TargetOptions {
         os: "dragonfly".to_string(),
         dynamic_linking: true,
         executables: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         linker_is_gnu: true,
         has_rpath: true,
         position_independent_executables: true,

compiler/rustc_target/src/spec/freebsd_base.rs

@@ -5,7 +5,7 @@ pub fn opts() -> TargetOptions {
         os: "freebsd".to_string(),
         dynamic_linking: true,
         executables: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         linker_is_gnu: true,
         has_rpath: true,
         position_independent_executables: true,

compiler/rustc_target/src/spec/fuchsia_base.rs

@@ -25,7 +25,7 @@ pub fn opts() -> TargetOptions {
         linker: Some("rust-lld".to_owned()),
         dynamic_linking: true,
         executables: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         is_like_fuchsia: true,
         linker_is_gnu: true,
         pre_link_args,

compiler/rustc_target/src/spec/haiku_base.rs

@@ -5,7 +5,7 @@ pub fn opts() -> TargetOptions {
         os: "haiku".to_string(),
         dynamic_linking: true,
         executables: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         relro_level: RelroLevel::Full,
         linker_is_gnu: true,
         ..Default::default()

compiler/rustc_target/src/spec/illumos_base.rs

@@ -20,7 +20,7 @@ pub fn opts() -> TargetOptions {
         dynamic_linking: true,
         executables: true,
         has_rpath: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         is_like_solaris: true,
         limit_rdylib_exports: false, // Linker doesn't support this
         eliminate_frame_pointer: false,

compiler/rustc_target/src/spec/l4re_base.rs

@@ -20,7 +20,7 @@ pub fn opts() -> TargetOptions {
         executables: true,
         panic_strategy: PanicStrategy::Abort,
         linker: Some("ld".to_string()),
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         ..Default::default()
     }
 }

compiler/rustc_target/src/spec/linux_base.rs

@@ -5,7 +5,7 @@ pub fn opts() -> TargetOptions {
         os: "linux".to_string(),
         dynamic_linking: true,
         executables: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         linker_is_gnu: true,
         has_rpath: true,
         position_independent_executables: true,

compiler/rustc_target/src/spec/mod.rs

@@ -1042,8 +1042,12 @@ pub struct TargetOptions {
     pub staticlib_prefix: String,
     /// String to append to the name of every static library. Defaults to ".a".
     pub staticlib_suffix: String,
-    /// OS family to use for conditional compilation. Valid options: "unix", "windows".
+    /// Values of the `target_family` cfg set for this target.
-    pub os_family: Option<String>,
+    ///
+    /// Common options are: "unix", "windows". Defaults to no families.
+    ///
+    /// See <https://doc.rust-lang.org/reference/conditional-compilation.html#target_family>.
+    pub families: Vec<String>,
     /// Whether the target toolchain's ABI supports returning small structs as an integer.
     pub abi_return_struct_as_int: bool,
     /// Whether the target toolchain is like macOS's. Only useful for compiling against iOS/macOS,
@@ -1293,7 +1297,7 @@ impl Default for TargetOptions {
             exe_suffix: String::new(),
             staticlib_prefix: "lib".to_string(),
             staticlib_suffix: ".a".to_string(),
-            os_family: None,
+            families: Vec::new(),
             abi_return_struct_as_int: false,
             is_like_osx: false,
             is_like_solaris: false,
@@ -1605,14 +1609,6 @@ impl Target {
                         .map(|s| s.to_string() );
                 }
             } );
-            ($key_name:ident = $json_name:expr, optional) => ( {
-                let name = $json_name;
-                if let Some(o) = obj.find(name) {
-                    base.$key_name = o
-                        .as_string()
-                        .map(|s| s.to_string() );
-                }
-            } );
             ($key_name:ident, LldFlavor) => ( {
                 let name = (stringify!($key_name)).replace("_", "-");
                 obj.find(&name[..]).and_then(|o| o.as_string().and_then(|s| {
@@ -1759,6 +1755,16 @@ impl Target {
                     Some(Ok(()))
                 })).unwrap_or(Ok(()))
             } );
+            ($key_name:ident, TargetFamilies) => ( {
+                let value = obj.find("target-family");
+                if let Some(v) = value.and_then(Json::as_array) {
+                    base.$key_name = v.iter()
+                        .map(|a| a.as_string().unwrap().to_string())
+                        .collect();
+                } else if let Some(v) = value.and_then(Json::as_string) {
+                    base.$key_name = vec![v.to_string()];
+                }
+            } );
         }
 
         if let Some(s) = obj.find("target-endian").and_then(Json::as_string) {
@@ -1802,7 +1808,7 @@ impl Target {
         key!(exe_suffix);
         key!(staticlib_prefix);
         key!(staticlib_suffix);
-        key!(os_family = "target-family", optional);
+        key!(families, TargetFamilies);
         key!(abi_return_struct_as_int, bool);
         key!(is_like_osx, bool);
         key!(is_like_solaris, bool);
@@ -2042,7 +2048,7 @@ impl ToJson for Target {
         target_option_val!(exe_suffix);
         target_option_val!(staticlib_prefix);
         target_option_val!(staticlib_suffix);
-        target_option_val!(os_family, "target-family");
+        target_option_val!(families, "target-family");
         target_option_val!(abi_return_struct_as_int);
         target_option_val!(is_like_osx);
         target_option_val!(is_like_solaris);

compiler/rustc_target/src/spec/netbsd_base.rs

@@ -5,7 +5,7 @@ pub fn opts() -> TargetOptions {
         os: "netbsd".to_string(),
         dynamic_linking: true,
         executables: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         linker_is_gnu: true,
         no_default_libraries: false,
         has_rpath: true,

compiler/rustc_target/src/spec/openbsd_base.rs

@@ -5,7 +5,7 @@ pub fn opts() -> TargetOptions {
         os: "openbsd".to_string(),
         dynamic_linking: true,
         executables: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         linker_is_gnu: true,
         has_rpath: true,
         abi_return_struct_as_int: true,

compiler/rustc_target/src/spec/redox_base.rs

@@ -6,7 +6,7 @@ pub fn opts() -> TargetOptions {
         env: "relibc".to_string(),
         dynamic_linking: true,
         executables: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         linker_is_gnu: true,
         has_rpath: true,
         position_independent_executables: true,

compiler/rustc_target/src/spec/solaris_base.rs

@@ -6,7 +6,7 @@ pub fn opts() -> TargetOptions {
         dynamic_linking: true,
         executables: true,
         has_rpath: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         is_like_solaris: true,
         limit_rdylib_exports: false, // Linker doesn't support this
         eh_frame_header: false,

compiler/rustc_target/src/spec/vxworks_base.rs

@@ -9,7 +9,7 @@ pub fn opts() -> TargetOptions {
         exe_suffix: ".vxe".to_string(),
         dynamic_linking: true,
         executables: true,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         linker_is_gnu: true,
         has_rpath: true,
         has_elf_tls: true,

compiler/rustc_target/src/spec/wasm32_unknown_emscripten.rs

@@ -38,7 +38,7 @@ pub fn target() -> Target {
         is_like_emscripten: true,
         panic_strategy: PanicStrategy::Unwind,
         post_link_args,
-        os_family: Some("unix".to_string()),
+        families: vec!["unix".to_string()],
         ..options
     };
     Target {

compiler/rustc_target/src/spec/wasm_base.rs

@@ -61,6 +61,7 @@ pub fn options() -> TargetOptions {
 
     TargetOptions {
         is_like_wasm: true,
+        families: vec!["wasm".to_string()],
 
         // we allow dynamic linking, but only cdylibs. Basically we allow a
         // final library artifact that exports some symbols (a wasm module) but

compiler/rustc_target/src/spec/windows_gnu_base.rs

@@ -71,7 +71,7 @@ pub fn opts() -> TargetOptions {
         dll_prefix: String::new(),
         dll_suffix: ".dll".to_string(),
         exe_suffix: ".exe".to_string(),
-        os_family: Some("windows".to_string()),
+        families: vec!["windows".to_string()],
         is_like_windows: true,
         allows_weak_linkage: false,
         pre_link_args,

compiler/rustc_target/src/spec/windows_msvc_base.rs

@@ -13,7 +13,7 @@ pub fn opts() -> TargetOptions {
         exe_suffix: ".exe".to_string(),
         staticlib_prefix: String::new(),
         staticlib_suffix: ".lib".to_string(),
-        os_family: Some("windows".to_string()),
+        families: vec!["windows".to_string()],
         crt_static_allows_dylibs: true,
         crt_static_respected: true,
         requires_uwtable: true,

compiler/rustc_typeck/src/check/wfcheck.rs

@@ -1298,12 +1298,14 @@ fn check_variances_for_type_defn<'tcx>(
 
         match param.name {
             hir::ParamName::Error => {}
-            _ => report_bivariance(tcx, param.span, param.name.ident().name),
+            _ => report_bivariance(tcx, param),
         }
     }
 }
 
-fn report_bivariance(tcx: TyCtxt<'_>, span: Span, param_name: Symbol) {
+fn report_bivariance(tcx: TyCtxt<'_>, param: &rustc_hir::GenericParam<'_>) {
+    let span = param.span;
+    let param_name = param.name.ident().name;
     let mut err = error_392(tcx, span, param_name);
 
     let suggested_marker_id = tcx.lang_items().phantom_data();
@@ -1318,7 +1320,14 @@ fn report_bivariance(tcx: TyCtxt<'_>, span: Span, param_name: Symbol) {
         format!("consider removing `{}` or referring to it in a field", param_name)
     };
     err.help(&msg);
-    err.emit();
+
+    if matches!(param.kind, rustc_hir::GenericParamKind::Type { .. }) {
+        err.help(&format!(
+            "if you intended `{0}` to be a const parameter, use `const {0}: usize` instead",
+            param_name
+        ));
+    }
+    err.emit()
 }
 
 /// Feature gates RFC 2056 -- trivial bounds, checking for global bounds that

library/std/src/io/error.rs

@@ -186,6 +186,11 @@ pub enum ErrorKind {
     /// This means that the operation can never succeed.
     #[stable(feature = "unsupported_error", since = "1.53.0")]
     Unsupported,
+
+    /// An operation could not be completed, because it failed
+    /// to allocate enough memory.
+    #[stable(feature = "out_of_memory_error", since = "1.53.0")]
+    OutOfMemory,
 }
 
 impl ErrorKind {
@@ -210,6 +215,7 @@ impl ErrorKind {
             ErrorKind::Other => "other os error",
             ErrorKind::UnexpectedEof => "unexpected end of file",
             ErrorKind::Unsupported => "unsupported",
+            ErrorKind::OutOfMemory => "out of memory",
         }
     }
 }

library/std/src/sys/unix/mod.rs

@@ -149,6 +149,7 @@ pub fn decode_error_kind(errno: i32) -> ErrorKind {
         libc::ETIMEDOUT => ErrorKind::TimedOut,
         libc::EEXIST => ErrorKind::AlreadyExists,
         libc::ENOSYS => ErrorKind::Unsupported,
+        libc::ENOMEM => ErrorKind::OutOfMemory,
 
         // These two constants can have the same value on some systems,
         // but different values on others, so we can't use a match

library/std/src/sys/wasi/mod.rs

@@ -77,6 +77,7 @@ pub fn decode_error_kind(errno: i32) -> std_io::ErrorKind {
         wasi::ERRNO_EXIST => AlreadyExists,
         wasi::ERRNO_AGAIN => WouldBlock,
         wasi::ERRNO_NOSYS => Unsupported,
+        wasi::ERRNO_NOMEM => OutOfMemory,
         _ => Other,
     }
 }

library/std/src/sys/windows/c.rs

@@ -168,6 +168,8 @@ pub const ERROR_FILE_NOT_FOUND: DWORD = 2;
 pub const ERROR_PATH_NOT_FOUND: DWORD = 3;
 pub const ERROR_ACCESS_DENIED: DWORD = 5;
 pub const ERROR_INVALID_HANDLE: DWORD = 6;
+pub const ERROR_NOT_ENOUGH_MEMORY: DWORD = 8;
+pub const ERROR_OUTOFMEMORY: DWORD = 14;
 pub const ERROR_NO_MORE_FILES: DWORD = 18;
 pub const ERROR_HANDLE_EOF: DWORD = 38;
 pub const ERROR_FILE_EXISTS: DWORD = 80;

library/std/src/sys/windows/mod.rs

@@ -71,6 +71,7 @@ pub fn decode_error_kind(errno: i32) -> ErrorKind {
         c::ERROR_PATH_NOT_FOUND => return ErrorKind::NotFound,
         c::ERROR_NO_DATA => return ErrorKind::BrokenPipe,
         c::ERROR_INVALID_PARAMETER => return ErrorKind::InvalidInput,
+        c::ERROR_NOT_ENOUGH_MEMORY | c::ERROR_OUTOFMEMORY => return ErrorKind::OutOfMemory,
         c::ERROR_SEM_TIMEOUT
         | c::WAIT_TIMEOUT
         | c::ERROR_DRIVER_CANCEL_TIMEOUT

src/librustdoc/clean/inline.rs

@@ -19,7 +19,7 @@ use crate::clean::{self, Attributes, AttributesExt, GetDefId, ToSource};
 use crate::core::DocContext;
 use crate::formats::item_type::ItemType;
 
-use super::Clean;
+use super::{Clean, Visibility};
 
 type Attrs<'hir> = rustc_middle::ty::Attributes<'hir>;
 
@@ -188,13 +188,23 @@ crate fn record_extern_fqn(cx: &mut DocContext<'_>, did: DefId, kind: ItemType)
     if did.is_local() {
         cx.cache.exact_paths.insert(did, fqn);
     } else {
-        cx.cache.external_paths.insert(did, (fqn, ItemType::from(kind)));
+        cx.cache.external_paths.insert(did, (fqn, kind));
     }
 }
 
 crate fn build_external_trait(cx: &mut DocContext<'_>, did: DefId) -> clean::Trait {
-    let trait_items =
+    let trait_items = cx
-        cx.tcx.associated_items(did).in_definition_order().map(|item| item.clean(cx)).collect();
+        .tcx
+        .associated_items(did)
+        .in_definition_order()
+        .map(|item| {
+            // When building an external trait, the cleaned trait will have all items public,
+            // which causes methods to have a `pub` prefix, which is invalid since items in traits
+            // can not have a visibility prefix. Thus we override the visibility here manually.
+            // See https://github.com/rust-lang/rust/issues/81274
+            clean::Item { visibility: Visibility::Inherited, ..item.clean(cx) }
+        })
+        .collect();
 
     let predicates = cx.tcx.predicates_of(did);
     let generics = (cx.tcx.generics_of(did), predicates).clean(cx);

src/librustdoc/clean/mod.rs

@@ -17,11 +17,11 @@ use rustc_hir::def::{CtorKind, DefKind, Res};
 use rustc_hir::def_id::{CrateNum, DefId, CRATE_DEF_INDEX, LOCAL_CRATE};
 use rustc_index::vec::{Idx, IndexVec};
 use rustc_infer::infer::region_constraints::{Constraint, RegionConstraintData};
-use rustc_middle::bug;
 use rustc_middle::middle::resolve_lifetime as rl;
 use rustc_middle::ty::fold::TypeFolder;
 use rustc_middle::ty::subst::{InternalSubsts, Subst};
 use rustc_middle::ty::{self, AdtKind, Lift, Ty, TyCtxt};
+use rustc_middle::{bug, span_bug};
 use rustc_mir::const_eval::{is_const_fn, is_unstable_const_fn};
 use rustc_span::hygiene::{AstPass, MacroKind};
 use rustc_span::symbol::{kw, sym, Ident, Symbol};
@@ -158,7 +158,15 @@ impl Clean<GenericBound> for hir::GenericBound<'_> {
 impl Clean<Type> for (ty::TraitRef<'_>, &[TypeBinding]) {
     fn clean(&self, cx: &mut DocContext<'_>) -> Type {
         let (trait_ref, bounds) = *self;
-        inline::record_extern_fqn(cx, trait_ref.def_id, ItemType::Trait);
+        let kind = cx.tcx.def_kind(trait_ref.def_id).into();
+        if !matches!(kind, ItemType::Trait | ItemType::TraitAlias) {
+            span_bug!(
+                cx.tcx.def_span(trait_ref.def_id),
+                "`TraitRef` had unexpected kind {:?}",
+                kind
+            );
+        }
+        inline::record_extern_fqn(cx, trait_ref.def_id, kind);
         let path = external_path(
             cx,
             cx.tcx.item_name(trait_ref.def_id),

src/librustdoc/formats/cache.rs

@@ -327,6 +327,7 @@ impl<'a, 'tcx> DocFolder for CacheBuilder<'a, 'tcx> {
             | clean::EnumItem(..)
             | clean::TypedefItem(..)
             | clean::TraitItem(..)
+            | clean::TraitAliasItem(..)
             | clean::FunctionItem(..)
             | clean::ModuleItem(..)
             | clean::ForeignFunctionItem(..)
@@ -337,26 +338,43 @@ impl<'a, 'tcx> DocFolder for CacheBuilder<'a, 'tcx> {
             | clean::ForeignTypeItem
             | clean::MacroItem(..)
             | clean::ProcMacroItem(..)
-            | clean::VariantItem(..)
+            | clean::VariantItem(..) => {
-                if !self.cache.stripped_mod =>
+                if !self.cache.stripped_mod {
-            {
+                    // Re-exported items mean that the same id can show up twice
-                // Re-exported items mean that the same id can show up twice
+                    // in the rustdoc ast that we're looking at. We know,
-                // in the rustdoc ast that we're looking at. We know,
+                    // however, that a re-exported item doesn't show up in the
-                // however, that a re-exported item doesn't show up in the
+                    // `public_items` map, so we can skip inserting into the
-                // `public_items` map, so we can skip inserting into the
+                    // paths map if there was already an entry present and we're
-                // paths map if there was already an entry present and we're
+                    // not a public item.
-                // not a public item.
+                    if !self.cache.paths.contains_key(&item.def_id)
-                if !self.cache.paths.contains_key(&item.def_id)
+                        || self.cache.access_levels.is_public(item.def_id)
-                    || self.cache.access_levels.is_public(item.def_id)
+                    {
-                {
+                        self.cache
-                    self.cache.paths.insert(item.def_id, (self.cache.stack.clone(), item.type_()));
+                            .paths
+                            .insert(item.def_id, (self.cache.stack.clone(), item.type_()));
+                    }
                 }
             }
             clean::PrimitiveItem(..) => {
                 self.cache.paths.insert(item.def_id, (self.cache.stack.clone(), item.type_()));
             }
 
-            _ => {}
+            clean::ExternCrateItem { .. }
+            | clean::ImportItem(..)
+            | clean::OpaqueTyItem(..)
+            | clean::ImplItem(..)
+            | clean::TyMethodItem(..)
+            | clean::MethodItem(..)
+            | clean::StructFieldItem(..)
+            | clean::AssocConstItem(..)
+            | clean::AssocTypeItem(..)
+            | clean::StrippedItem(..)
+            | clean::KeywordItem(..) => {
+                // FIXME: Do these need handling?
+                // The person writing this comment doesn't know.
+                // So would rather leave them to an expert,
+                // as at least the list is better than `_ => {}`.
+            }
         }
 
         // Maintain the parent stack

src/test/rustdoc/auxiliary/trait-alias-mention.rs

@@ -0,0 +1,3 @@
+#![feature(trait_alias)]
+
+pub trait SomeAlias = std::fmt::Debug + std::marker::Copy;

src/test/rustdoc/auxiliary/trait-visibility.rs

@@ -0,0 +1,3 @@
+pub trait Bar {
+    fn foo();
+}

src/test/rustdoc/trait-alias-mention.rs

@@ -0,0 +1,10 @@
+// aux-build:trait-alias-mention.rs
+// build-aux-docs
+
+#![crate_name = "foo"]
+
+extern crate trait_alias_mention;
+
+// @has foo/fn.mention_alias_in_bounds.html '//a[@href="../trait_alias_mention/traitalias.SomeAlias.html"]' 'SomeAlias'
+pub fn mention_alias_in_bounds<T: trait_alias_mention::SomeAlias>() {
+}

src/test/rustdoc/trait-visibility.rs

@@ -0,0 +1,8 @@
+// aux-build:trait-visibility.rs
+
+#![crate_name = "foo"]
+
+extern crate trait_visibility;
+
+// @has foo/trait.Bar.html '//a[@href="#tymethod.foo"]/..' "fn foo()"
+pub use trait_visibility::Bar;

src/test/rustdoc/trait_alias.rs

@@ -19,3 +19,5 @@ pub trait CopyAlias = Copy;
 pub trait Alias2 = Copy + Debug;
 // @has foo/traitalias.Foo.html '//section[@id="main"]/pre' 'trait Foo<T> = Into<T> + Debug;'
 pub trait Foo<T> = Into<T> + Debug;
+// @has foo/fn.bar.html '//a[@href="traitalias.Alias2.html"]' 'Alias2'
+pub fn bar<T>() where T: Alias2 {}

src/test/ui/cfg/cfg-family.rs

@@ -1,6 +1,6 @@
-// run-pass
+// build-pass
 // pretty-expanded FIXME #23616
-// ignore-wasm32-bare no target_family
+// ignore-wasm32-bare no bare family
 // ignore-sgx
 
 #[cfg(windows)]

src/test/ui/cfg/cfg-target-family.rs

@@ -1,5 +1,4 @@
-// run-pass
+// build-pass
-// ignore-wasm32-bare no target_family
 // ignore-sgx
 
 // pretty-expanded FIXME #23616
@@ -11,3 +10,7 @@ pub fn main() {
 #[cfg(target_family = "unix")]
 pub fn main() {
 }
+
+#[cfg(target_family="wasm")]
+pub fn main() {
+}

src/test/ui/const-generics/const-param-type-depends-on-type-param.full.stderr

@@ -11,6 +11,7 @@ LL | pub struct Dependent<T, const X: T>([(); X]);
    |                      ^ unused parameter
    |
    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `T` to be a const parameter, use `const T: usize` instead
 
 error: aborting due to 2 previous errors
 

src/test/ui/const-generics/const-param-type-depends-on-type-param.min.stderr

@@ -11,6 +11,7 @@ LL | pub struct Dependent<T, const X: T>([(); X]);
    |                      ^ unused parameter
    |
    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `T` to be a const parameter, use `const T: usize` instead
 
 error: aborting due to 2 previous errors
 

src/test/ui/const-generics/issue-67375.full.stderr

@@ -15,6 +15,7 @@ LL | struct Bug<T> {
    |            ^ unused parameter
    |
    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `T` to be a const parameter, use `const T: usize` instead
 
 error: aborting due to previous error; 1 warning emitted
 

src/test/ui/const-generics/issue-67375.min.stderr

@@ -14,6 +14,7 @@ LL | struct Bug<T> {
    |            ^ unused parameter
    |
    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `T` to be a const parameter, use `const T: usize` instead
 
 error: aborting due to 2 previous errors
 

src/test/ui/const-generics/issue-67945-1.full.stderr

@@ -19,6 +19,7 @@ LL | struct Bug<S> {
    |            ^ unused parameter
    |
    = help: consider removing `S`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `S` to be a const parameter, use `const S: usize` instead
 
 error: aborting due to 2 previous errors
 

src/test/ui/const-generics/issue-67945-1.min.stderr

@@ -23,6 +23,7 @@ LL | struct Bug<S> {
    |            ^ unused parameter
    |
    = help: consider removing `S`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `S` to be a const parameter, use `const S: usize` instead
 
 error: aborting due to 3 previous errors
 

src/test/ui/const-generics/issue-67945-2.full.stderr

@@ -19,6 +19,7 @@ LL | struct Bug<S> {
    |            ^ unused parameter
    |
    = help: consider removing `S`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `S` to be a const parameter, use `const S: usize` instead
 
 error: aborting due to 2 previous errors
 

src/test/ui/const-generics/issue-67945-2.min.stderr

@@ -23,6 +23,7 @@ LL | struct Bug<S> {
    |            ^ unused parameter
    |
    = help: consider removing `S`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `S` to be a const parameter, use `const S: usize` instead
 
 error: aborting due to 3 previous errors
 

src/test/ui/const-generics/unused-type-param-suggestion.rs

@@ -0,0 +1,4 @@
+#![crate_type="lib"]
+
+struct Example<N>;
+//~^ ERROR parameter

src/test/ui/const-generics/unused-type-param-suggestion.stderr

@@ -0,0 +1,12 @@
+error[E0392]: parameter `N` is never used
+  --> $DIR/unused-type-param-suggestion.rs:3:16
+   |
+LL | struct Example<N>;
+   |                ^ unused parameter
+   |
+   = help: consider removing `N`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `N` to be a const parameter, use `const N: usize` instead
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0392`.

src/test/ui/empty/empty-struct-unit-pat.stderr

@@ -1,84 +1,154 @@
 error[E0532]: expected tuple struct or tuple variant, found unit struct `Empty2`
   --> $DIR/empty-struct-unit-pat.rs:21:9
    |
+LL | struct Empty2;
+   | -------------- `Empty2` defined here
+...
 LL |         Empty2() => ()
-   |         ^^^^^^ help: a tuple struct with a similar name exists: `XEmpty6`
+   |         ^^^^^^^^
    | 
   ::: $DIR/auxiliary/empty-struct.rs:3:1
    |
 LL | pub struct XEmpty6();
    | --------------------- similarly named tuple struct `XEmpty6` defined here
+   |
+help: use this syntax instead
+   |
+LL |         Empty2 => ()
+   |         ^^^^^^
+help: a tuple struct with a similar name exists
+   |
+LL |         XEmpty6() => ()
+   |         ^^^^^^^
 
 error[E0532]: expected tuple struct or tuple variant, found unit struct `XEmpty2`
   --> $DIR/empty-struct-unit-pat.rs:24:9
    |
 LL |         XEmpty2() => ()
-   |         ^^^^^^^ help: a tuple struct with a similar name exists: `XEmpty6`
+   |         ^^^^^^^^^
    | 
-  ::: $DIR/auxiliary/empty-struct.rs:3:1
+  ::: $DIR/auxiliary/empty-struct.rs:2:1
    |
+LL | pub struct XEmpty2;
+   | ------------------- `XEmpty2` defined here
 LL | pub struct XEmpty6();
    | --------------------- similarly named tuple struct `XEmpty6` defined here
+   |
+help: use this syntax instead
+   |
+LL |         XEmpty2 => ()
+   |         ^^^^^^^
+help: a tuple struct with a similar name exists
+   |
+LL |         XEmpty6() => ()
+   |         ^^^^^^^
 
 error[E0532]: expected tuple struct or tuple variant, found unit struct `Empty2`
   --> $DIR/empty-struct-unit-pat.rs:28:9
    |
+LL | struct Empty2;
+   | -------------- `Empty2` defined here
+...
 LL |         Empty2(..) => ()
-   |         ^^^^^^ help: a tuple struct with a similar name exists: `XEmpty6`
+   |         ^^^^^^^^^^
    | 
   ::: $DIR/auxiliary/empty-struct.rs:3:1
    |
 LL | pub struct XEmpty6();
    | --------------------- similarly named tuple struct `XEmpty6` defined here
+   |
+help: use this syntax instead
+   |
+LL |         Empty2 => ()
+   |         ^^^^^^
+help: a tuple struct with a similar name exists
+   |
+LL |         XEmpty6(..) => ()
+   |         ^^^^^^^
 
 error[E0532]: expected tuple struct or tuple variant, found unit struct `XEmpty2`
   --> $DIR/empty-struct-unit-pat.rs:32:9
    |
 LL |         XEmpty2(..) => ()
-   |         ^^^^^^^ help: a tuple struct with a similar name exists: `XEmpty6`
+   |         ^^^^^^^^^^^
    | 
-  ::: $DIR/auxiliary/empty-struct.rs:3:1
+  ::: $DIR/auxiliary/empty-struct.rs:2:1
    |
+LL | pub struct XEmpty2;
+   | ------------------- `XEmpty2` defined here
 LL | pub struct XEmpty6();
    | --------------------- similarly named tuple struct `XEmpty6` defined here
+   |
+help: use this syntax instead
+   |
+LL |         XEmpty2 => ()
+   |         ^^^^^^^
+help: a tuple struct with a similar name exists
+   |
+LL |         XEmpty6(..) => ()
+   |         ^^^^^^^
 
 error[E0532]: expected tuple struct or tuple variant, found unit variant `E::Empty4`
   --> $DIR/empty-struct-unit-pat.rs:37:9
    |
+LL |     Empty4
+   |     ------ `E::Empty4` defined here
+...
 LL |         E::Empty4() => ()
-   |         ^^^^^^^^^ not a tuple struct or tuple variant
+   |         ^^^^^^^^^^^ help: use this syntax instead: `E::Empty4`
 
 error[E0532]: expected tuple struct or tuple variant, found unit variant `XE::XEmpty4`
   --> $DIR/empty-struct-unit-pat.rs:41:9
    |
 LL |         XE::XEmpty4() => (),
-   |         ^^^^-------
+   |         ^^^^^^^^^^^^^
-   |             |
-   |             help: a tuple variant with a similar name exists: `XEmpty5`
    | 
-  ::: $DIR/auxiliary/empty-struct.rs:8:5
+  ::: $DIR/auxiliary/empty-struct.rs:7:5
    |
+LL |     XEmpty4,
+   |     ------- `XE::XEmpty4` defined here
 LL |     XEmpty5(),
    |     --------- similarly named tuple variant `XEmpty5` defined here
+   |
+help: use this syntax instead
+   |
+LL |         XE::XEmpty4 => (),
+   |         ^^^^^^^^^^^
+help: a tuple variant with a similar name exists
+   |
+LL |         XE::XEmpty5() => (),
+   |             ^^^^^^^
 
 error[E0532]: expected tuple struct or tuple variant, found unit variant `E::Empty4`
   --> $DIR/empty-struct-unit-pat.rs:46:9
    |
+LL |     Empty4
+   |     ------ `E::Empty4` defined here
+...
 LL |         E::Empty4(..) => ()
-   |         ^^^^^^^^^ not a tuple struct or tuple variant
+   |         ^^^^^^^^^^^^^ help: use this syntax instead: `E::Empty4`
 
 error[E0532]: expected tuple struct or tuple variant, found unit variant `XE::XEmpty4`
   --> $DIR/empty-struct-unit-pat.rs:50:9
    |
 LL |         XE::XEmpty4(..) => (),
-   |         ^^^^-------
+   |         ^^^^^^^^^^^^^^^
-   |             |
-   |             help: a tuple variant with a similar name exists: `XEmpty5`
    | 
-  ::: $DIR/auxiliary/empty-struct.rs:8:5
+  ::: $DIR/auxiliary/empty-struct.rs:7:5
    |
+LL |     XEmpty4,
+   |     ------- `XE::XEmpty4` defined here
 LL |     XEmpty5(),
    |     --------- similarly named tuple variant `XEmpty5` defined here
+   |
+help: use this syntax instead
+   |
+LL |         XE::XEmpty4 => (),
+   |         ^^^^^^^^^^^
+help: a tuple variant with a similar name exists
+   |
+LL |         XE::XEmpty5(..) => (),
+   |             ^^^^^^^
 
 error: aborting due to 8 previous errors
 

src/test/ui/enum-discriminant/issue-70453-generics-in-discr-ice.stderr

@@ -14,6 +14,7 @@ LL | enum MyWeirdOption<T> {
    |                    ^ unused parameter
    |
    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `T` to be a const parameter, use `const T: usize` instead
 
 error: aborting due to 2 previous errors
 

src/test/ui/enum/issue-67945-1.stderr

@@ -14,6 +14,7 @@ LL | enum Bug<S> {
    |          ^ unused parameter
    |
    = help: consider removing `S`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `S` to be a const parameter, use `const S: usize` instead
 
 error: aborting due to 2 previous errors
 

src/test/ui/enum/issue-67945-2.stderr

@@ -14,6 +14,7 @@ LL | enum Bug<S> {
    |          ^ unused parameter
    |
    = help: consider removing `S`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `S` to be a const parameter, use `const S: usize` instead
 
 error: aborting due to 2 previous errors
 

src/test/ui/error-codes/E0392.stderr

@@ -5,6 +5,7 @@ LL | enum Foo<T> { Bar }
    |          ^ unused parameter
    |
    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `T` to be a const parameter, use `const T: usize` instead
 
 error: aborting due to previous error
 

src/test/ui/inner-static-type-parameter.stderr

@@ -13,6 +13,7 @@ LL | enum Bar<T> { What }
    |          ^ unused parameter
    |
    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `T` to be a const parameter, use `const T: usize` instead
 
 error: aborting due to 2 previous errors
 

src/test/ui/issues/issue-17904-2.stderr

@@ -5,6 +5,7 @@ LL | struct Foo<T> where T: Copy;
    |            ^ unused parameter
    |
    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `T` to be a const parameter, use `const T: usize` instead
 
 error: aborting due to previous error
 

src/test/ui/issues/issue-20413.stderr

@@ -5,6 +5,7 @@ LL | struct NoData<T>;
    |               ^ unused parameter
    |
    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `T` to be a const parameter, use `const T: usize` instead
 
 error[E0275]: overflow evaluating the requirement `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>: Foo`
   --> $DIR/issue-20413.rs:8:36

src/test/ui/issues/issue-32004.stderr

@@ -21,8 +21,11 @@ LL |         Foo::Baz => {}
 error[E0532]: expected tuple struct or tuple variant, found unit struct `S`
   --> $DIR/issue-32004.rs:16:9
    |
+LL | struct S;
+   | --------- `S` defined here
+...
 LL |         S(()) => {}
-   |         ^ not a tuple struct or tuple variant
+   |         ^^^^^ help: use this syntax instead: `S`
 
 error: aborting due to 2 previous errors
 

src/test/ui/issues/issue-36299.stderr

@@ -13,6 +13,7 @@ LL | struct Foo<'a, A> {}
    |                ^ unused parameter
    |
    = help: consider removing `A`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `A` to be a const parameter, use `const A: usize` instead
 
 error: aborting due to 2 previous errors
 

src/test/ui/issues/issue-36638.stderr

@@ -17,6 +17,7 @@ LL | struct Foo<Self>(Self);
    |            ^^^^ unused parameter
    |
    = help: consider removing `Self`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `Self` to be a const parameter, use `const Self: usize` instead
 
 error: aborting due to 3 previous errors
 

src/test/ui/issues/issue-37534.stderr

@@ -22,6 +22,7 @@ LL | struct Foo<T: ?Hash> { }
    |            ^ unused parameter
    |
    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `T` to be a const parameter, use `const T: usize` instead
 
 error: aborting due to 2 previous errors; 1 warning emitted
 

src/test/ui/issues/issue-pr29383.stderr

@@ -1,14 +1,20 @@
 error[E0532]: expected tuple struct or tuple variant, found unit variant `E::A`
   --> $DIR/issue-pr29383.rs:9:14
    |
+LL |     A,
+   |     - `E::A` defined here
+...
 LL |         Some(E::A(..)) => {}
-   |              ^^^^ not a tuple struct or tuple variant
+   |              ^^^^^^^^ help: use this syntax instead: `E::A`
 
 error[E0532]: expected tuple struct or tuple variant, found unit variant `E::B`
   --> $DIR/issue-pr29383.rs:11:14
    |
+LL |     B,
+   |     - `E::B` defined here
+...
 LL |         Some(E::B(..)) => {}
-   |              ^^^^ not a tuple struct or tuple variant
+   |              ^^^^^^^^ help: use this syntax instead: `E::B`
 
 error: aborting due to 2 previous errors
 

src/test/ui/match/match-pattern-field-mismatch-2.stderr

@@ -1,8 +1,11 @@
 error[E0532]: expected tuple struct or tuple variant, found unit variant `Color::NoColor`
   --> $DIR/match-pattern-field-mismatch-2.rs:12:11
    |
+LL |         NoColor,
+   |         ------- `Color::NoColor` defined here
+...
 LL |           Color::NoColor(_) => { }
-   |           ^^^^^^^^^^^^^^ not a tuple struct or tuple variant
+   |           ^^^^^^^^^^^^^^^^^ help: use this syntax instead: `Color::NoColor`
 
 error: aborting due to previous error
 

src/test/ui/pattern/pattern-error-continue.stderr

@@ -9,11 +9,21 @@ error[E0532]: expected tuple struct or tuple variant, found unit variant `A::D`
    |
 LL |     B(isize, isize),
    |     --------------- similarly named tuple variant `B` defined here
+LL |     C(isize, isize, isize),
+LL |     D
+   |     - `A::D` defined here
 ...
 LL |         A::D(_) => (),
-   |         ^^^-
+   |         ^^^^^^^
-   |            |
+   |
-   |            help: a tuple variant with a similar name exists: `B`
+help: use this syntax instead
+   |
+LL |         A::D => (),
+   |         ^^^^
+help: a tuple variant with a similar name exists
+   |
+LL |         A::B(_) => (),
+   |            ^
 
 error[E0023]: this pattern has 3 fields, but the corresponding tuple variant has 2 fields
   --> $DIR/pattern-error-continue.rs:17:9

src/test/ui/suggestions/issue-84700.rs

@@ -0,0 +1,26 @@
+// test for suggestion on fieldless enum variant
+
+#[derive(PartialEq, Debug)]
+enum FarmAnimal {
+    Worm,
+    Cow,
+    Bull,
+    Chicken { num_eggs: usize },
+    Dog (String),
+}
+
+fn what_does_the_animal_say(animal: &FarmAnimal) {
+
+    let noise = match animal {
+        FarmAnimal::Cow(_) => "moo".to_string(),
+        //~^ ERROR expected tuple struct or tuple variant, found unit variant `FarmAnimal::Cow`
+        FarmAnimal::Chicken(_) => "cluck, cluck!".to_string(),
+        //~^ ERROR expected tuple struct or tuple variant, found struct variant `FarmAnimal::Chicken`
+        FarmAnimal::Dog{..} => "woof!".to_string(),
+        _ => todo!()
+    };
+
+    println!("{:?} says: {:?}", animal, noise);
+}
+
+fn main() {}

src/test/ui/suggestions/issue-84700.stderr

@@ -0,0 +1,21 @@
+error[E0532]: expected tuple struct or tuple variant, found unit variant `FarmAnimal::Cow`
+  --> $DIR/issue-84700.rs:15:9
+   |
+LL |     Cow,
+   |     --- `FarmAnimal::Cow` defined here
+...
+LL |         FarmAnimal::Cow(_) => "moo".to_string(),
+   |         ^^^^^^^^^^^^^^^^^^ help: use this syntax instead: `FarmAnimal::Cow`
+
+error[E0532]: expected tuple struct or tuple variant, found struct variant `FarmAnimal::Chicken`
+  --> $DIR/issue-84700.rs:17:9
+   |
+LL |     Chicken { num_eggs: usize },
+   |     --------------------------- `FarmAnimal::Chicken` defined here
+...
+LL |         FarmAnimal::Chicken(_) => "cluck, cluck!".to_string(),
+   |         ^^^^^^^^^^^^^^^^^^^^^^ help: use struct pattern syntax instead: `FarmAnimal::Chicken { num_eggs }`
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0532`.

src/test/ui/variance/variance-unused-type-param.stderr

@@ -5,6 +5,7 @@ LL | struct SomeStruct<A> { x: u32 }
    |                   ^ unused parameter
    |
    = help: consider removing `A`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `A` to be a const parameter, use `const A: usize` instead
 
 error[E0392]: parameter `A` is never used
   --> $DIR/variance-unused-type-param.rs:9:15
@@ -13,6 +14,7 @@ LL | enum SomeEnum<A> { Nothing }
    |               ^ unused parameter
    |
    = help: consider removing `A`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `A` to be a const parameter, use `const A: usize` instead
 
 error[E0392]: parameter `T` is never used
   --> $DIR/variance-unused-type-param.rs:13:15
@@ -21,6 +23,7 @@ LL | enum ListCell<T> {
    |               ^ unused parameter
    |
    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
+   = help: if you intended `T` to be a const parameter, use `const T: usize` instead
 
 error: aborting due to 3 previous errors
 

src/tools/clippy/tests/ui/wildcard_enum_match_arm.fixed

@@ -77,7 +77,7 @@ fn main() {
     let error_kind = ErrorKind::NotFound;
     match error_kind {
         ErrorKind::NotFound => {},
-        ErrorKind::PermissionDenied | ErrorKind::ConnectionRefused | ErrorKind::ConnectionReset | ErrorKind::ConnectionAborted | ErrorKind::NotConnected | ErrorKind::AddrInUse | ErrorKind::AddrNotAvailable | ErrorKind::BrokenPipe | ErrorKind::AlreadyExists | ErrorKind::WouldBlock | ErrorKind::InvalidInput | ErrorKind::InvalidData | ErrorKind::TimedOut | ErrorKind::WriteZero | ErrorKind::Interrupted | ErrorKind::Other | ErrorKind::UnexpectedEof | ErrorKind::Unsupported | _ => {},
+        ErrorKind::PermissionDenied | ErrorKind::ConnectionRefused | ErrorKind::ConnectionReset | ErrorKind::ConnectionAborted | ErrorKind::NotConnected | ErrorKind::AddrInUse | ErrorKind::AddrNotAvailable | ErrorKind::BrokenPipe | ErrorKind::AlreadyExists | ErrorKind::WouldBlock | ErrorKind::InvalidInput | ErrorKind::InvalidData | ErrorKind::TimedOut | ErrorKind::WriteZero | ErrorKind::Interrupted | ErrorKind::Other | ErrorKind::UnexpectedEof | ErrorKind::Unsupported | ErrorKind::OutOfMemory | _ => {},
     }
     match error_kind {
         ErrorKind::NotFound => {},
@@ -99,6 +99,7 @@ fn main() {
         ErrorKind::Other => {},
         ErrorKind::UnexpectedEof => {},
         ErrorKind::Unsupported => {},
+        ErrorKind::OutOfMemory => {},
         _ => {},
     }
 }

src/tools/clippy/tests/ui/wildcard_enum_match_arm.rs

@@ -99,6 +99,7 @@ fn main() {
         ErrorKind::Other => {},
         ErrorKind::UnexpectedEof => {},
         ErrorKind::Unsupported => {},
+        ErrorKind::OutOfMemory => {},
         _ => {},
     }
 }

src/tools/clippy/tests/ui/wildcard_enum_match_arm.stderr

@@ -32,7 +32,7 @@ error: wildcard matches known variants and will also match future added variants
   --> $DIR/wildcard_enum_match_arm.rs:80:9
    |
 LL |         _ => {},
-   |         ^ help: try this: `ErrorKind::PermissionDenied | ErrorKind::ConnectionRefused | ErrorKind::ConnectionReset | ErrorKind::ConnectionAborted | ErrorKind::NotConnected | ErrorKind::AddrInUse | ErrorKind::AddrNotAvailable | ErrorKind::BrokenPipe | ErrorKind::AlreadyExists | ErrorKind::WouldBlock | ErrorKind::InvalidInput | ErrorKind::InvalidData | ErrorKind::TimedOut | ErrorKind::WriteZero | ErrorKind::Interrupted | ErrorKind::Other | ErrorKind::UnexpectedEof | ErrorKind::Unsupported | _`
+   |         ^ help: try this: `ErrorKind::PermissionDenied | ErrorKind::ConnectionRefused | ErrorKind::ConnectionReset | ErrorKind::ConnectionAborted | ErrorKind::NotConnected | ErrorKind::AddrInUse | ErrorKind::AddrNotAvailable | ErrorKind::BrokenPipe | ErrorKind::AlreadyExists | ErrorKind::WouldBlock | ErrorKind::InvalidInput | ErrorKind::InvalidData | ErrorKind::TimedOut | ErrorKind::WriteZero | ErrorKind::Interrupted | ErrorKind::Other | ErrorKind::UnexpectedEof | ErrorKind::Unsupported | ErrorKind::OutOfMemory | _`
 
 error: aborting due to 5 previous errors