commit ac8f50473caf0b43c05e07028cae7f13d074efb5
author Jason Newcomb <jsnewcomb@pm.me> Thu Jun 19 15:30:13 2025 -0400
committer Jason Newcomb <jsnewcomb@pm.me> Thu Jun 19 16:03:21 2025 -0400
tree b70714c5080525a0a0fb341309ca0b4c9c1f20cb
parent 19c1c709054ea1964d942259c5c33ad6489cd1e0

Fix `non_copy_const` ICE

clippy_lints/src/non_copy_const.rs

diff --git a/clippy_lints/src/non_copy_const.rs b/clippy_lints/src/non_copy_const.rs
index a27c6aa..5f10e19 100644
--- a/clippy_lints/src/non_copy_const.rs
+++ b/clippy_lints/src/non_copy_const.rs
@@ -617,7 +617,7 @@
 
             // Then a type check. Note we only check the type here as the result
             // gets cached.
-            let ty = EarlyBinder::bind(typeck.expr_ty(src_expr)).instantiate(tcx, init_args);
+            let ty = typeck.expr_ty(src_expr);
             // Normalized as we need to check if this is an array later.
             let ty = tcx.try_normalize_erasing_regions(typing_env, ty).unwrap_or(ty);
             if self.is_ty_freeze(tcx, typing_env, ty).is_freeze() {

tests/ui/borrow_interior_mutable_const.rs

diff --git a/tests/ui/borrow_interior_mutable_const.rs b/tests/ui/borrow_interior_mutable_const.rs
index 0f439f7..674450a 100644
--- a/tests/ui/borrow_interior_mutable_const.rs
+++ b/tests/ui/borrow_interior_mutable_const.rs
@@ -218,4 +218,20 @@
         let _ = &S::VALUE.1; //~ borrow_interior_mutable_const
         let _ = &S::VALUE.2;
     }
+    {
+        pub struct Foo<T, const N: usize>(pub Entry<N>, pub T);
+
+        pub struct Entry<const N: usize>(pub Cell<[u32; N]>);
+
+        impl<const N: usize> Entry<N> {
+            const INIT: Self = Self(Cell::new([42; N]));
+        }
+
+        impl<T, const N: usize> Foo<T, N> {
+            pub fn make_foo(v: T) -> Self {
+                // Used to ICE due to incorrect instantiation.
+                Foo(Entry::INIT, v)
+            }
+        }
+    }
 }