1 files changed, 6 insertions, 0 deletions
diff --git a/src/test/ui/macros/unreachable-fmt-msg.rs b/src/test/ui/macros/unreachable-fmt-msg.rs
new file mode 100644
index 00000000000..b2df8f82500
--- /dev/null
+++ b/src/test/ui/macros/unreachable-fmt-msg.rs
@@ -0,0 +1,6 @@
+// run-fail
+// error-pattern:internal error: entered unreachable code: 6 is not prime
+
+fn main() {
+    unreachable!("{} is not {}", 6u32, "prime");
+}