[Issue 20780] Function parameter UDA not accepted in nested function declarations

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20780

--- Comment #3 from Basile-z <b2.temp at gmx.com> ---
Created attachment 1780
  --> https://issues.dlang.org/attachment.cgi?id=1780&action=edit
patch for the bug

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