Like new.target, super.prop doesn't parse inside debugger eval because of static scope chain issues. Unlike new.target, it won't work if we just hook it up. We need to detect when we're inside a debugger eval, and emit a new instruction JSOP_DEBUGSUPERBASE, which will know how to query the DebugScopeProxy that it will find. We should not make this true in the general case, because the global scope might not be a DSP.