ref: 5247d32a51b1bfab5b5c63d1894a3f896a9b9212 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; }