1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/ui/inline-const/const-expr-lifetime.rs b/src/test/ui/inline-const/const-expr-lifetime.rs
new file mode 100644
index 000000000..d883deb28
--- /dev/null
+++ b/src/test/ui/inline-const/const-expr-lifetime.rs
@@ -0,0 +1,35 @@
+// run-pass
+
+#![feature(const_mut_refs)]
+#![feature(inline_const)]
+
+use std::marker::PhantomData;
+
+// rust-lang/rust#78174: ICE: "cannot convert ReErased to a region vid"
+fn issue_78174() {
+    let foo = const { "foo" };
+    assert_eq!(foo, "foo");
+}
+
+pub struct InvariantRef<'a, T: ?Sized>(&'a T, PhantomData<&'a mut &'a T>);
+
+impl<'a, T: ?Sized> InvariantRef<'a, T> {
+    pub const fn new(r: &'a T) -> Self {
+        InvariantRef(r, PhantomData)
+    }
+}
+
+fn get_invariant_ref<'a>() -> InvariantRef<'a, ()> {
+    const { InvariantRef::<'a, ()>::new(&()) }
+}
+
+fn get_invariant_ref2<'a>() -> InvariantRef<'a, ()> {
+    // Try some type inference
+    const { InvariantRef::new(&()) }
+}
+
+fn main() {
+    issue_78174();
+    get_invariant_ref();
+    get_invariant_ref2();
+}