gcc/testsuite/gdc.test/fail_compilation/diag9620.d

/*
TEST_OUTPUT:
---
fail_compilation/diag9620.d(18): Error: `pure` function `diag9620.main.bar` cannot call impure function `diag9620.foo1`
fail_compilation/diag9620.d(19): Error: `pure` function `diag9620.main.bar` cannot call impure function `diag9620.foo2!().foo2`
---
*/

int x;

void foo1() { x = 3; }
void foo2()() { x = 3; }

void main() pure
{
    void bar()
    {
        foo1();
        foo2();
    }
}