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-rw-r--r--tests/ui/macros/unreachable-format-arg.rs15
1 files changed, 15 insertions, 0 deletions
diff --git a/tests/ui/macros/unreachable-format-arg.rs b/tests/ui/macros/unreachable-format-arg.rs
new file mode 100644
index 000000000..ff059ad9e
--- /dev/null
+++ b/tests/ui/macros/unreachable-format-arg.rs
@@ -0,0 +1,15 @@
+// run-fail
+// ignore-emscripten no processes
+
+// revisions: edition_2015 edition_2021
+// [edition_2015]edition:2015
+// [edition_2021]edition:2021
+// [edition_2015]error-pattern:internal error: entered unreachable code: x is {x}
+// [edition_2021]error-pattern:internal error: entered unreachable code: x is 5
+
+#![allow(non_fmt_panics)]
+
+fn main() {
+ let x = 5;
+ unreachable!("x is {x}");
+}