[Issue 21033] enhancement: allow assign to field when the shared owing object has been locked already without cast

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21033

--- Comment #1 from mw <mingwu at gmail.com> ---
Created attachment 1797
  --> https://issues.dlang.org/attachment.cgi?id=1797&action=edit
enhancement: allow assign to field when the shared owing object has been locked
already without cast

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