1 files changed, 10 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/target/issue-3974.rs b/src/tools/rustfmt/tests/target/issue-3974.rs
new file mode 100644
index 000000000..a9f992ebd
--- /dev/null
+++ b/src/tools/rustfmt/tests/target/issue-3974.rs
@@ -0,0 +1,10 @@
+fn emulate_foreign_item() {
+    match link_name {
+        // A comment here will duplicate the attribute
+        #[rustfmt::skip]
+        | "pthread_mutexattr_init"
+        | "pthread_mutexattr_settype"
+        | "pthread_mutex_init"
+        => {}
+    }
+}