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[Issue 20179] 'goto' skips over declaration triggered for unused variable
Aug 06, 2020
Mathias LANG
Dec 17, 2022
Iain Buclaw
Apr 18, 2023
RazvanN
August 06, 2020
Gravatar of Mathias LANGPosted by Mathias LANGReply
Mathias LANG
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https://issues.dlang.org/show_bug.cgi?id=20179

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

           What    |Removed                     |Added
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                 OS|Mac OS X                    |All

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December 17, 2022
Gravatar of Iain BuclawPosted by Iain BuclawReply
Iain Buclaw
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https://issues.dlang.org/show_bug.cgi?id=20179

Iain Buclaw <ibuclaw@gdcproject.org> changed:

           What    |Removed                     |Added
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           Priority|P1                          |P4

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April 18, 2023
Gravatar of RazvanNPosted by RazvanNReply
RazvanN
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https://issues.dlang.org/show_bug.cgi?id=20179

RazvanN <razvan.nitu1305@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |razvan.nitu1305@gmail.com

--- Comment #1 from RazvanN <razvan.nitu1305@gmail.com> ---
The compiler does not do any dataflow analysis so it cannot know whether `str` is used or not below L1. However, `str` could be used, therefore the compiler is conservative in this case and errors. In most cases, I think that the error could actually prevent wrong code.

Anyway, if last use analysis is implemented for move constructors/perfect fordwarding maybe this will have a chance of being fixed, however, chances are slim.

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