[Issue 20437] Transitive immutable/shared does not apply to variables captured by delegates

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=20437

--- Comment #1 from Chloé <rightfold+bugzilla+dl...@gmail.com> ---
To clarify, the proposed solution is to disallow the conversion of:

    T delegate()

into:

    immutable(T delegate())
    shared(T delegate())

Just like it is disallowed to convert T[] to immutable(T[]), or T* to
immutable(T*). Similar for shared.

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