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-rw-r--r--tests/ui/extern-flag/invalid-crate-name.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/tests/ui/extern-flag/invalid-crate-name.rs b/tests/ui/extern-flag/invalid-crate-name.rs
new file mode 100644
index 000000000..a26b5dd46
--- /dev/null
+++ b/tests/ui/extern-flag/invalid-crate-name.rs
@@ -0,0 +1,4 @@
+// compile-flags: --extern=?#1%$
+// error-pattern: crate name `?#1%$` passed to `--extern` is not a valid ASCII identifier
+
+fn main() {}