1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/ui/macros/unreachable-arg.rs b/src/test/ui/macros/unreachable-arg.rs
new file mode 100644
index 000000000..4024bd20b
--- /dev/null
+++ b/src/test/ui/macros/unreachable-arg.rs
@@ -0,0 +1,16 @@
+// ignore-emscripten no processes
+
+// revisions: edition_2015 edition_2021
+// [edition_2015]edition:2015
+// [edition_2021]edition:2021
+// [edition_2015]run-fail
+// [edition_2021]check-fail
+// [edition_2015]error-pattern:internal error: entered unreachable code: hello
+// [edition_2021]error-pattern:format argument must be a string literal
+
+#![allow(non_fmt_panics)]
+
+fn main() {
+    let a = "hello";
+    unreachable!(a);
+}