1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/unsafe/unsafe-const-fn.rs b/src/test/ui/unsafe/unsafe-const-fn.rs
new file mode 100644
index 000000000..65e3acf30
--- /dev/null
+++ b/src/test/ui/unsafe/unsafe-const-fn.rs
@@ -0,0 +1,15 @@
+// A quick test of 'unsafe const fn' functionality
+
+// revisions: mir thir
+// [thir]compile-flags: -Z thir-unsafeck
+
+const unsafe fn dummy(v: u32) -> u32 {
+    !v
+}
+
+const VAL: u32 = dummy(0xFFFF);
+//~^ ERROR E0133
+
+fn main() {
+    assert_eq!(VAL, 0xFFFF0000);
+}