1 files changed, 16 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/source/issue-3840/version-two_hard-tabs.rs b/src/tools/rustfmt/tests/source/issue-3840/version-two_hard-tabs.rs
new file mode 100644
index 00000000000..7b505fda87c
--- /dev/null
+++ b/src/tools/rustfmt/tests/source/issue-3840/version-two_hard-tabs.rs
@@ -0,0 +1,16 @@
+// rustfmt-hard_tabs: true
+// rustfmt-version: Two
+
+impl<Target: FromEvent<A> + FromEvent<B>, A: Widget2<Ctx = C>, B: Widget2<Ctx = C>, C: for<'a> CtxFamily<'a>> Widget2 for WidgetEventLifter<Target, A, B>
+{
+    type Ctx = C;
+    type Event = Vec<Target>;
+}
+
+mod foo {
+    impl<Target: FromEvent<A> + FromEvent<B>, A: Widget2<Ctx = C>, B: Widget2<Ctx = C>, C: for<'a> CtxFamily<'a>> Widget2 for WidgetEventLifter<Target, A, B>
+    {
+        type Ctx = C;
+        type Event = Vec<Target>;
+    }
+}