1 files changed, 12 insertions, 0 deletions
diff --git a/tests/ui/foreign/issue-91370-foreign-fn-block-impl.rs b/tests/ui/foreign/issue-91370-foreign-fn-block-impl.rs
new file mode 100644
index 00000000000..2ac3ca29355
--- /dev/null
+++ b/tests/ui/foreign/issue-91370-foreign-fn-block-impl.rs
@@ -0,0 +1,12 @@
+// Regression test for issue #91370.
+
+extern {
+    //~^ `extern` blocks define existing foreign functions
+    fn f() {
+        //~^ incorrect function inside `extern` block
+        //~| cannot have a body
+        impl Copy for u8 {}
+    }
+}
+
+fn main() {}