gcc/testsuite/gdc.test/fail_compilation/test21319.d

// https://issues.dlang.org/show_bug.cgi?id=21319
/*
TEST_OUTPUT:
---
fail_compilation/test21319.d(11): Error: circular reference to `test21319.C.c`
---
*/

class C
{
    immutable C c = new C();
}