diff --git a/src/test/ui/pattern/const-pat-ice.stderr b/src/test/ui/pattern/const-pat-ice.stderr
index 260c2e04d74f7..fabaea0535f5b 100644
--- a/src/test/ui/pattern/const-pat-ice.stderr
+++ b/src/test/ui/pattern/const-pat-ice.stderr
@@ -1,4 +1,4 @@
-thread 'rustc' panicked at 'assertion failed: rows.iter().all(|r| r.len() == v.len())', src/librustc_mir/hair/pattern/_match.rs:1083:5
+thread 'rustc' panicked at 'assertion failed: rows.iter().all(|r| r.len() == v.len())', src/librustc_mir/hair/pattern/_match.rs:1085:5
 note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
 
 error: internal compiler error: unexpected panic
diff --git a/src/test/ui/symbol-names/impl2.rs b/src/test/ui/symbol-names/impl2.rs
new file mode 100644
index 0000000000000..d48b182f2a200
--- /dev/null
+++ b/src/test/ui/symbol-names/impl2.rs
@@ -0,0 +1,14 @@
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+trait Foo {
+    fn baz();
+}
+
+impl Foo for [u8; 1 + 2] {
+    #[rustc_def_path] //~ ERROR def-path(<[u8; _] as Foo>::baz)
+    fn baz() { }
+}
+
+fn main() {
+}
diff --git a/src/test/ui/symbol-names/impl2.stderr b/src/test/ui/symbol-names/impl2.stderr
new file mode 100644
index 0000000000000..de26fed44139e
--- /dev/null
+++ b/src/test/ui/symbol-names/impl2.stderr
@@ -0,0 +1,8 @@
+error: def-path(<[u8; _] as Foo>::baz)
+  --> $DIR/impl2.rs:9:5
+   |
+LL |     #[rustc_def_path]
+   |     ^^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+