1 files changed, 27 insertions, 0 deletions
diff --git a/src/test/ui/parser/trait-object-bad-parens.stderr b/src/test/ui/parser/trait-object-bad-parens.stderr
new file mode 100644
index 000000000..74e484eeb
--- /dev/null
+++ b/src/test/ui/parser/trait-object-bad-parens.stderr
@@ -0,0 +1,27 @@
+error[E0178]: expected a path on the left-hand side of `+`, not `((Auto))`
+  --> $DIR/trait-object-bad-parens.rs:8:16
+   |
+LL |     let _: Box<((Auto)) + Auto>;
+   |                ^^^^^^^^^^^^^^^ expected a path
+
+error[E0178]: expected a path on the left-hand side of `+`, not `(Auto + Auto)`
+  --> $DIR/trait-object-bad-parens.rs:10:16
+   |
+LL |     let _: Box<(Auto + Auto) + Auto>;
+   |                ^^^^^^^^^^^^^^^^^^^^ expected a path
+
+error[E0178]: expected a path on the left-hand side of `+`, not `(Auto)`
+  --> $DIR/trait-object-bad-parens.rs:12:16
+   |
+LL |     let _: Box<(Auto +) + Auto>;
+   |                ^^^^^^^^^^^^^^^ expected a path
+
+error[E0178]: expected a path on the left-hand side of `+`, not `(dyn Auto)`
+  --> $DIR/trait-object-bad-parens.rs:14:16
+   |
+LL |     let _: Box<(dyn Auto) + Auto>;
+   |                ^^^^^^^^^^^^^^^^^ expected a path
+
+error: aborting due to 4 previous errors
+
+For more information about this error, try `rustc --explain E0178`.