PR c/46889

	* c-decl.c (detect_field_duplicates): Ensure hash is used for
	finding duplicates when first field is anonymous.

testsuite:
	* gcc.dg/anon-struct-15.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@168348 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 16 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/anon-struct-15.c b/gcc/testsuite/gcc.dg/anon-struct-15.c
new file mode 100644
index 00000000000..d9e786a8d86
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/anon-struct-15.c
@@ -0,0 +1,16 @@
+/* Test diagnostics for duplicate field names involving anonymous
+   struct or union as first field.  PR 46889.  */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+struct foo {
+  union {
+    struct {
+      unsigned long time_stamp;
+    };
+    struct {
+      int *page;
+    };
+  };
+  int *page; /* { dg-error "duplicate member" } */
+};