--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/guality/pr86687.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,28 @@
+// PR debug/86687
+// { dg-do run }
+// { dg-options "-g" }
+
+class string {
+public:
+  string (int p) { this->p = p ; }
+  string (const string &s) { this->p = s.p; }
+
+  int p;
+};
+
+class foo {
+public:
+  foo (string dir_hint) {
+    p = dir_hint.p; // { dg-final { gdb-test . "dir_hint.p" 3 } }
+  }
+
+  int p;
+};
+
+int
+main (void)
+{
+  string s = 3;
+  foo bar(s);
+  return !(bar.p == 3);
+}