class Foo
{
    string foo()
    {
        return "";
    }
}

void main()
{
    Foo f = new Foo;
    mixin(f.foo());
}

test.d(14): Error: variable f cannot be read at compile time
Assertion failure: 'v->ctfeAdrOnStack >= 0 && v->ctfeAdrOnStack < stackPointer()' on line 100 in file 'interpret.c'

The error is ok but the ICE should not appear. Not my code, reduced from: http://forum.dlang.org/thread/kftoqbweswexqjumkhks@forum.dlang.org#post-kftoqbweswexqjumkhks:40forum.dlang.org