[inferbo] Add FN test of using global constant

Summary: After a redeclaration of a global constant, it is not parsed as ICE(integral constant expression), which results in FN.

Reviewed By: ezgicicek

Differential Revision: D14299288

fbshipit-source-id: 394afd595

infer/tests/codetoanalyze/cpp/bufferoverrun/class.cpp

@@ -291,6 +291,18 @@ void use_global_Bad() {
   a[S::x] = 0;
 }
 
+const unsigned int S::x;
+
+void use_global_2_Good() {
+  int a[50];
+  a[S::x] = 0;
+}
+
+void use_global_2_Bad_FN() {
+  int a[30];
+  a[S::x] = 0;
+}
+
 class my_class6 {
   int* x;