ref: 5f0409dd660ec9a663b8d0e6ccc9664b44f2e4e3 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; }