Make "`aa[key]`" use the same runtime call as "`key in aa`". The runtime calls these were using were different, but with equivalent definitions. With `ldc -O3`, the following functions now all compile to the exact same code: {{{ int[int] y; void foo(int x) { if (x in y) { auto z = x in y; sink(*z); } } void bar(int x) { if (x in y) { sink(y[x]); } } void baz(int x) { if (auto p = x in y) { sink(*p); } } }}}

module mini.nested19;

void main()
{
    int i = 1;
    
    class C
    {
        int j = 2;
        void func()
        {
            int k = 3;
            
            void foo()
            {
                i = i+j+k;
            }
            
            foo();
        }
    }
    
    auto c = new C;
    c.func();
    
    assert(i == 6);
}