[Issue 21674] [REG v2.086] `alias this` triggers wrong deprecation message on function call

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21674

Mathias LANG <pro.mathias.lang at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|DUPLICATE                   |---

--- Comment #2 from Mathias LANG <pro.mathias.lang at gmail.com> ---
In the provided example, there is no assignment taking place, the compiler is
calling `str(string)`, so it is not "a feature".

I just read the initial issue again, and *if* we forbid `alias this` on the
LHS, the code I showed would still be valid. Looking at the deprecation, it is
expected to be turned into an error, which is why I marked it as
`rejects-valid`.

In Johan's last message, the code should really not need the `opAssign` in S1.

P.S: As a side note, issues that one would deem "a feature, not a bug" should
not be marked as duplicate of issue that change a behavior, but rather,
INVALID, as their premise is wrong.

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