ref: 4c09eaec1c1f81e175b6e8b6266e8a2c9aa7afaa 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; }