1 files changed, 33 insertions, 0 deletions

diff --git a/src/test/ui/const-generics/issues/issue-70180-1-stalled_on.rs b/src/test/ui/const-generics/issues/issue-70180-1-stalled_on.rs
new file mode 100644
index 000000000..2ec37cc3a
--- /dev/null
+++ b/src/test/ui/const-generics/issues/issue-70180-1-stalled_on.rs
@@ -0,0 +1,33 @@
+// build-pass
+
+pub fn works() {
+    let array/*: [_; _]*/ = default_array();
+    let _: [_; 4] = array;
+    Foo::foo(&array);
+}
+
+pub fn didnt_work() {
+    let array/*: [_; _]*/ = default_array();
+    Foo::foo(&array);
+    let _: [_; 4] = array;
+}
+
+trait Foo {
+    fn foo(&self) {}
+}
+
+impl Foo for [i32; 4] {}
+impl Foo for [i64; 8] {}
+
+// Only needed because `[_; _]` is not valid type syntax.
+fn default_array<T, const N: usize>() -> [T; N]
+where
+    [T; N]: Default,
+{
+    Default::default()
+}
+
+fn main() {
+    works();
+    didnt_work();
+}