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From: "tilkax at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/96311] New: false positive for -Wunused-but-set-variable (const/constexpr identifier used in generic lambda) Date: Fri, 24 Jul 2020 15:36:42 +0000 [thread overview] Message-ID: <bug-96311-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96311 Bug ID: 96311 Summary: false positive for -Wunused-but-set-variable (const/constexpr identifier used in generic lambda) Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: tilkax at gmail dot com Target Milestone: --- Using gcc version 11.0.0 20200723, this code: void foo() { constexpr int used = 0; [](auto unused) { return used; }; } triggers an incorrect warning: <source>:3:19: warning: variable 'used' set but not used [-Wunused-but-set-variable] 3 | constexpr int used = 0; | ^~~~ It doesn't matter whether the lambda is called but it does need to be a generic lambda to trigger the incorrect warning. Also, both the lambda parameter as well as the lambda itself are unused here but don't trigger any warnings :/
next reply other threads:[~2020-07-24 15:36 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-24 15:36 tilkax at gmail dot com [this message] 2020-07-27 7:11 ` [Bug c++/96311] " marxin at gcc dot gnu.org 2020-07-27 7:40 ` tilkax at gmail dot com 2020-07-27 10:09 ` [Bug c++/96311] [8/9/10/11 Regression] " jakub at gcc dot gnu.org 2020-07-27 10:17 ` jakub at gcc dot gnu.org 2021-02-11 15:25 ` jakub at gcc dot gnu.org 2021-03-10 17:29 ` hewillk at gmail dot com 2021-04-05 20:04 ` jason at gcc dot gnu.org 2021-04-05 21:27 ` cvs-commit at gcc dot gnu.org 2021-04-05 21:29 ` [Bug c++/96311] [8/9/10 " jason at gcc dot gnu.org 2021-05-14 9:53 ` [Bug c++/96311] [9/10 " jakub at gcc dot gnu.org 2021-05-20 21:35 ` cvs-commit at gcc dot gnu.org 2021-06-01 8:18 ` rguenth at gcc dot gnu.org 2022-05-13 17:41 ` [Bug c++/96311] [9 " cvs-commit at gcc dot gnu.org 2022-05-13 17:45 ` jason at gcc dot gnu.org
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