gcc/testsuite/gdc.test/fail_compilation/fail12932.d

/*
TEST_OUTPUT:
---
fail_compilation/fail12932.d(11): Error: array literal in @nogc function 'fail12932.foo' may cause GC allocation
fail_compilation/fail12932.d(15): Error: array literal in @nogc function 'fail12932.foo' may cause GC allocation
---
*/

int* foo() @nogc
{
    foreach (ref e; [1,2,3])
    {
    }

    foreach (ref e; [1,2,3])
    {
        return &e;
    }
}