[Issue 20674] [DIP1000] inference of `scope` is easily confused

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20674

--- Comment #5 from Walter Bright <bugzilla at digitalmars.com> ---
(In reply to Dennis from comment #3)
> Surely you can infer scope here without creating a control-flow graph, right?

The trouble is, once you start doing a lame DFA, then people want a real DFA.
Doing DFA in the front end will significantly slow it down.

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