1 files changed, 11 insertions, 0 deletions
diff --git a/src/test/ui/mismatched_types/const-fn-in-trait.rs b/src/test/ui/mismatched_types/const-fn-in-trait.rs
new file mode 100644
index 000000000..e04d59c58
--- /dev/null
+++ b/src/test/ui/mismatched_types/const-fn-in-trait.rs
@@ -0,0 +1,11 @@
+trait Foo {
+    fn f() -> u32;
+    const fn g(); //~ ERROR cannot be declared const
+}
+
+impl Foo for u32 {
+    const fn f() -> u32 { 22 } //~ ERROR cannot be declared const
+    fn g() {}
+}
+
+fn main() { }