ref: 4eb0595fdcfb5064a5f81b1ffe4fb2de4c6a3dd3 dir: /tests/execute/0155-struct-compl.c/
extern struct X x; int foo(); int main() { extern struct X x; return &x != 0; } struct X {int v;}; int foo() { x.v = 0; return x.v; }