1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/defaults/generic-expr-default-mismatched-types.rs b/src/test/ui/const-generics/defaults/generic-expr-default-mismatched-types.rs
new file mode 100644
index 000000000..777865d1c
--- /dev/null
+++ b/src/test/ui/const-generics/defaults/generic-expr-default-mismatched-types.rs
@@ -0,0 +1,16 @@
+#![feature(generic_const_exprs)]
+#![allow(incomplete_features)]
+
+struct Foo<const N: usize, const M: usize = { N + 1 }>;
+fn should_unify<const N: usize>() -> Foo<N> where [(); { N + 1 }]: {
+    Foo::<N, { N + 1 }>
+}
+pub fn shouldnt_unify<const N: usize>() -> Foo<N>
+where
+    [(); { N + 1 }]:,
+    [(); { N + 2 }]:, {
+    Foo::<N, { N + 2 }>
+    //~^ error: mismatched types
+}
+
+fn main() {}