1 files changed, 10 insertions, 0 deletions
diff --git a/compiler/rustc_lint/src/nonstandard_style.rs b/compiler/rustc_lint/src/nonstandard_style.rs
index a3e7c84584d..d1138e8f1fa 100644
--- a/compiler/rustc_lint/src/nonstandard_style.rs
+++ b/compiler/rustc_lint/src/nonstandard_style.rs
@@ -422,6 +422,16 @@ impl<'tcx> LateLintPass<'tcx> for NonSnakeCase {
         }
     }
 
+    fn check_ty(&mut self, cx: &LateContext<'_>, ty: &hir::Ty<'_, hir::AmbigArg>) {
+        if let hir::TyKind::BareFn(hir::BareFnTy { param_idents, .. }) = &ty.kind {
+            for param_ident in *param_idents {
+                if let Some(param_ident) = param_ident {
+                    self.check_snake_case(cx, "variable", param_ident);
+                }
+            }
+        }
+    }
+
     fn check_trait_item(&mut self, cx: &LateContext<'_>, item: &hir::TraitItem<'_>) {
         if let hir::TraitItemKind::Fn(_, hir::TraitFn::Required(param_idents)) = item.kind {
             self.check_snake_case(cx, "trait method", &item.ident);