gcc/testsuite/gdc.test/fail_compilation/diag9861.d

/*
TEST_OUTPUT:
---
fail_compilation/diag9861.d(8): Error: no property 'epsilon' for type 'int'
fail_compilation/diag9861.d(9):        while looking for match for Foo!int
---
*/
struct Foo(T, real x = T.epsilon) {}
Foo!(int) q;