1 files changed, 14 insertions, 0 deletions
diff --git a/tests/ui/consts/const-extern-fn/const-extern-fn-requires-unsafe.rs b/tests/ui/consts/const-extern-fn/const-extern-fn-requires-unsafe.rs
new file mode 100644
index 000000000..afe645ae8
--- /dev/null
+++ b/tests/ui/consts/const-extern-fn/const-extern-fn-requires-unsafe.rs
@@ -0,0 +1,14 @@
+// revisions: mir thir
+// [thir]compile-flags: -Z thir-unsafeck
+
+#![feature(const_extern_fn)]
+
+const unsafe extern "C" fn foo() -> usize { 5 }
+
+fn main() {
+    let a: [u8; foo()];
+    //[mir]~^ call to unsafe function is unsafe and requires unsafe function or block
+    //[thir]~^^ call to unsafe function `foo` is unsafe and requires unsafe function or block
+    foo();
+    //[mir]~^ ERROR call to unsafe function is unsafe and requires unsafe function or block
+}