--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/Warray-bounds-8.c	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,22 @@
+/* PR c/92326 - wrong bound in zero-length array diagnostics
+   { dg-do compile }
+   { dg-options "-O2 -Wall" } */
+
+extern int a0[0];
+extern int ax[];
+
+void warn_global_array (void)
+{
+  a0[0] = 0;        // { dg-warning "array bounds of 'int *\\\[0]'" }
+  ax[-1] = 0;       // { dg-warning "array bounds of 'int *\\\[]'" }
+}
+
+
+struct S0 { int n, a0[0]; } s0;
+struct Sx { int n, ax[]; } sx = { 0 };
+
+void warn_member_array (void)
+{
+  s0.a0[0] = 0;     // { dg-warning "array bounds of 'int *\\\[0]'" }
+  sx.ax[0] = 0;     // { dg-warning "array bounds of 'int *\\\[]'" }
+}