gcc/testsuite/gdc.test/fail_compilation/fail246.d

/*
TEST_OUTPUT:
---
fail_compilation/fail246.d-mixin-11(11): Error: identifier expected, not `End of File`
fail_compilation/fail246.d-mixin-11(11): Error: `;` expected after `mixin`
---
*/

void a()
{
    mixin(`mixin`);
}