bors 63ef74b6aa Auto merge of #111717 - Urgau:uplift_fn_null_check, r=oli-obk ... Uplift `clippy::fn_null_check` lint This PR aims at uplifting the `clippy::fn_null_check` lint into rustc. ## `incorrect_fn_null_checks` (warn-by-default) The `incorrect_fn_null_checks` lint checks for expression that checks if a function pointer is null. ### Example ```rust let fn_ptr: fn() = /* somehow obtained nullable function pointer */ if (fn_ptr as *const ()).is_null() { /* ... */ } ``` ### Explanation Function pointers are assumed to be non-null, checking for their nullity is incorrect. ----- Mostly followed the instructions for uplifting a clippy lint described here: https://github.com/rust-lang/rust/pull/99696#pullrequestreview-1134072751 `@rustbot` label: +I-lang-nominated r? compiler		2023-07-11 09:34:48 +00:00
..
nonstandard_style	mv compiler to compiler/	2020-08-30 18:45:07 +03:00
array_into_iter.rs	errors: generate typed identifiers in each crate	2023-02-22 09:15:53 +00:00
builtin.rs	Move TyCtxt::mk_x to Ty::new_x where applicable	2023-07-05 20:27:07 +01:00
cast_ref_to_mut.rs	Uplift clippy::cast_ref_to_mut to rustc	2023-05-31 12:28:38 +02:00
context.rs	Move TyCtxt::mk_x to Ty::new_x where applicable	2023-07-05 20:27:07 +01:00
deref_into_dyn_supertrait.rs	Don't eagerly convert principal to string	2023-02-17 14:44:58 +00:00
drop_forget_useless.rs	Fix dropping_copy_types lint from linting in match-arm with side-effects	2023-07-01 16:05:55 +02:00
early.rs	Restrict From<S> for {D,Subd}iagnosticMessage.	2023-05-03 08:44:39 +10:00
enum_intrinsics_non_enums.rs	rename needs_subst to has_param	2023-04-27 08:35:19 +01:00
errors.rs	Use Cow in {D,Subd}iagnosticMessage.	2023-05-29 09:23:43 +10:00
expect.rs	Move expansion of query macros in rustc_middle to rustc_middle::query	2023-05-15 08:49:13 +02:00
fn_null_check.rs	Uplift clippy::fn_null_check to rustc	2023-07-10 18:12:41 +02:00
for_loops_over_fallibles.rs	use the correct param env	2023-03-21 09:57:22 +01:00
hidden_unicode_codepoints.rs	migrate: hidden_unicode_codepoints.rs	2023-01-09 17:07:25 -05:00
internal.rs	Use is_some_and/is_ok_and in less obvious spots	2023-05-24 14:33:43 +00:00
invalid_from_utf8.rs	Add invalid_from_utf8 analogous to invalid_from_utf8_unchecked	2023-05-27 00:18:28 +02:00
late.rs	Add an ensure_sufficient_stack to LateContextAndPass::visit_expr	2023-06-15 09:57:47 -07:00
let_underscore.rs	Fix typos in compiler	2023-04-10 22:02:52 +02:00
levels.rs	Stop confusing specification levels when computing expectations.	2023-05-18 08:52:54 +00:00
lib.rs	Uplift clippy::fn_null_check to rustc	2023-07-10 18:12:41 +02:00
lints.rs	Uplift clippy::fn_null_check to rustc	2023-07-10 18:12:41 +02:00
map_unit_fn.rs	Fix #109152, fix the scenario that we may can not get span of func	2023-03-15 14:07:39 +08:00
methods.rs	Do not suppress temporary_cstring_as_ptr in macros.	2023-04-04 18:55:02 +00:00
multiple_supertrait_upcastable.rs	Migrate predicates_of and caller_bounds to Clause	2023-06-26 23:12:03 +00:00
non_ascii_idents.rs	Fix typos in compiler	2023-04-10 22:02:52 +02:00
non_fmt_panic.rs	Use Option::is_some_and and Result::is_ok_and in the compiler	2023-05-24 14:20:41 +00:00
nonstandard_style.rs	allow host param to be lowercase	2023-07-04 11:47:46 +00:00
noop_method_call.rs	do not use stringly typed diagnostics	2023-06-13 13:53:56 +00:00
opaque_hidden_inferred_bound.rs	Move TyCtxt::mk_x to Ty::new_x where applicable	2023-07-05 20:27:07 +01:00
pass_by_value.rs	remove bound_type_of query; make type_of return EarlyBinder; change type_of in metadata	2023-02-16 17:05:56 -07:00
passes.rs	Take a LocalDefId in hir::Visitor::visit_fn.	2023-01-28 09:51:50 +00:00
redundant_semicolon.rs	refactor: cleanup	2023-01-09 18:57:02 -05:00
tests.rs	Update to last upstream version	2021-07-08 17:14:28 +02:00
traits.rs	Migrate predicates_of and caller_bounds to Clause	2023-06-26 23:12:03 +00:00
types.rs	Move TyCtxt::mk_x to Ty::new_x where applicable	2023-07-05 20:27:07 +01:00
unused.rs	Migrate item_bounds to ty::Clause	2023-06-22 18:34:23 +00:00