diff --git a/compiler/rustc_lint/src/levels.rs b/compiler/rustc_lint/src/levels.rs index 4ede9b4408798..42b771471d08f 100644 --- a/compiler/rustc_lint/src/levels.rs +++ b/compiler/rustc_lint/src/levels.rs @@ -299,6 +299,11 @@ impl<'tcx> Visitor<'tcx> for LintLevelsBuilder<'_, LintLevelQueryMap<'tcx>> { intravisit::walk_expr(self, e); } + fn visit_pat_field(&mut self, f: &'tcx hir::PatField<'tcx>) -> Self::Result { + self.add_id(f.hir_id); + intravisit::walk_pat_field(self, f); + } + fn visit_expr_field(&mut self, f: &'tcx hir::ExprField<'tcx>) { self.add_id(f.hir_id); intravisit::walk_expr_field(self, f); diff --git a/tests/ui/lint/unused/unused-field-in-pat-field.rs b/tests/ui/lint/unused/unused-field-in-pat-field.rs new file mode 100644 index 0000000000000..34959a1023f95 --- /dev/null +++ b/tests/ui/lint/unused/unused-field-in-pat-field.rs @@ -0,0 +1,21 @@ +//@ check-pass + +// Ensure we collect lint levels from pat fields in structs. + +#![deny(unused_variables)] + +pub struct Foo { + bar: u32, + baz: u32, +} + +pub fn test(foo: Foo) { + let Foo { + #[allow(unused_variables)] + bar, + #[allow(unused_variables)] + baz, + } = foo; +} + +fn main() {}