Add comment for future_incompatible lint group

2021-06-28 17:42:27 +02:00 · 2021-06-28 17:42:27 +02:00 · f0d7280ff3
commit f0d7280ff3
parent 0e28575909
1 changed files with 3 additions and 0 deletions
--- a/compiler/rustc_lint/src/context.rs
+++ b/compiler/rustc_lint/src/context.rs
@ -221,6 +221,9 @@ impl LintStore {
                        .lint_ids
                        .push(id);
                } else {
+                    // Lints belonging to the `future_incompatible` lint group are lints where a
+                    // future version of rustc will cause existing code to stop compiling.
+                    // Lints tied to an edition don't count because they are opt-in.
                    self.lint_groups
                        .entry("future_incompatible")
                        .or_insert(LintGroup {