[Issue 24208] [DIP1000] Nested function can escape scope parameter

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24208

--- Comment #3 from Paul Backus <snarwin+bugzilla at gmail.com> ---
Disregard previous example, I read the errors wrong. They occur in the function
bodies, not at the call site. The parameter of `escape` is not allowed to
escape at all if it is `scope`, even `return scope`.

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