1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/redecl-14.c b/gcc/testsuite/gcc.dg/redecl-14.c
new file mode 100644
index 000000000..b27c02441
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/redecl-14.c
@@ -0,0 +1,22 @@
+/* Some incompatible external linkage declarations were not diagnosed.
+   Bug 21342.  Test type in inner scope is correct.  */
+/* Origin: Joseph Myers <joseph@codesourcery.com> */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+typedef int IA[];
+typedef int IA5[5];
+typedef IA *IAP;
+typedef IA5 *IA5P;
+extern IAP a[];
+void
+f (void)
+{
+  {
+    extern IA5P a[];
+    sizeof (*a[0]);
+  }
+  extern IAP a[];
+  extern IAP a[5];
+  sizeof (*a[0]); /* { dg-error "invalid application of 'sizeof' to incomplete type 'IA'" } */
+}