1 files changed, 14 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/target/negative-impl.rs b/src/tools/rustfmt/tests/target/negative-impl.rs
new file mode 100644
index 000000000..16ce7e26a
--- /dev/null
+++ b/src/tools/rustfmt/tests/target/negative-impl.rs
@@ -0,0 +1,14 @@
+impl !Display for JoinHandle {}
+
+impl !Box<JoinHandle> {}
+
+impl !std::fmt::Display
+    for JoinHandle<T: std::future::Future + std::marker::Send + std::marker::Sync>
+{
+}
+
+impl
+    !JoinHandle<T: std::future::Future<Output> + std::marker::Send + std::marker::Sync + 'static>
+        + 'static
+{
+}