diff --git a/gcc/testsuite/gcc.dg/uninit-1.c b/gcc/testsuite/gcc.dg/uninit-1.c
new file mode 100644
index 00000000000..91838810fda
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/uninit-1.c
@@ -0,0 +1,30 @@
+/* Spurious uninitialized variable warnings, case 1.
+   Taken from cppfiles.c (merge_include_chains) */
+/* { dg-do compile } */
+/* { dg-options "-O -Wuninitialized" } */
+
+struct list
+{
+  struct list *next;
+  int id;
+};
+
+extern void free (void *);
+
+void remove_dupes (struct list *el)
+{
+  struct list *p, *q, *r;  /* { dg-bogus "r" "uninitialized variable warning" { xfail *-*-* } } */
+
+  for (p = el; p; p = p->next)
+  {
+    for (q = el; q != p; q = q->next)
+      if (q->id == p->id)
+      {
+	r->next = p->next;
+	free (p);
+	p = r;
+	break;
+      }
+    r = p;
+  }
+}