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* [Bug c++/113640] New: 'deducing this' lambda invoked multiple times unexpectedly @ 2024-01-28 15:51 hewillk at gmail dot com 2024-01-28 15:54 ` [Bug c++/113640] " hewillk at gmail dot com ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: hewillk at gmail dot com @ 2024-01-28 15:51 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113640 Bug ID: 113640 Summary: 'deducing this' lambda invoked multiple times unexpectedly Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: hewillk at gmail dot com Target Milestone: --- #include <iostream> int main() { auto l = [](this auto self, int n) { std::cout << n << " "; return self; }; l(1)(42)(100); } https://godbolt.org/z/3rEoGsPWe Clang prints "1 42 100" as expected, however, GCC prints "1 1 42 1 42 100", which is weird. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/113640] 'deducing this' lambda invoked multiple times unexpectedly 2024-01-28 15:51 [Bug c++/113640] New: 'deducing this' lambda invoked multiple times unexpectedly hewillk at gmail dot com @ 2024-01-28 15:54 ` hewillk at gmail dot com 2024-01-30 15:10 ` ppalka at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: hewillk at gmail dot com @ 2024-01-28 15:54 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113640 --- Comment #1 from 康桓瑋 <hewillk at gmail dot com> --- Noted that changing `this auto self` to `this auto&& self` will get the expected results ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/113640] 'deducing this' lambda invoked multiple times unexpectedly 2024-01-28 15:51 [Bug c++/113640] New: 'deducing this' lambda invoked multiple times unexpectedly hewillk at gmail dot com 2024-01-28 15:54 ` [Bug c++/113640] " hewillk at gmail dot com @ 2024-01-30 15:10 ` ppalka at gcc dot gnu.org 2024-01-30 15:45 ` cvs-commit at gcc dot gnu.org 2024-01-30 15:46 ` ppalka at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: ppalka at gcc dot gnu.org @ 2024-01-30 15:10 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113640 Patrick Palka <ppalka at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|unassigned at gcc dot gnu.org |ppalka at gcc dot gnu.org Last reconfirmed| |2024-01-30 Ever confirmed|0 |1 Status|UNCONFIRMED |ASSIGNED CC| |ppalka at gcc dot gnu.org ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/113640] 'deducing this' lambda invoked multiple times unexpectedly 2024-01-28 15:51 [Bug c++/113640] New: 'deducing this' lambda invoked multiple times unexpectedly hewillk at gmail dot com 2024-01-28 15:54 ` [Bug c++/113640] " hewillk at gmail dot com 2024-01-30 15:10 ` ppalka at gcc dot gnu.org @ 2024-01-30 15:45 ` cvs-commit at gcc dot gnu.org 2024-01-30 15:46 ` ppalka at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2024-01-30 15:45 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113640 --- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>: https://gcc.gnu.org/g:0857a00fe3226db8801384743b6d44353dcac9da commit r14-8631-g0857a00fe3226db8801384743b6d44353dcac9da Author: Patrick Palka <ppalka@redhat.com> Date: Tue Jan 30 10:44:56 2024 -0500 c++: duplicated side effects of xobj arg [PR113640] We miscompile the below testcase because keep_unused_object_arg thinks the object argument of an xobj member function is unused, and so it ends up duplicating the argument's side effects. PR c++/113640 gcc/cp/ChangeLog: * call.cc (keep_unused_object_arg): Punt for an xobj member function. gcc/testsuite/ChangeLog: * g++.dg/cpp23/explicit-obj-lambda14.C: New test. Reviewed-by: Jason Merrill <jason@redhat.com> ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/113640] 'deducing this' lambda invoked multiple times unexpectedly 2024-01-28 15:51 [Bug c++/113640] New: 'deducing this' lambda invoked multiple times unexpectedly hewillk at gmail dot com ` (2 preceding siblings ...) 2024-01-30 15:45 ` cvs-commit at gcc dot gnu.org @ 2024-01-30 15:46 ` ppalka at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: ppalka at gcc dot gnu.org @ 2024-01-30 15:46 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113640 Patrick Palka <ppalka at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |14.0 Keywords| |wrong-code Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> --- Fixed, thanks for the report. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2024-01-30 15:46 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2024-01-28 15:51 [Bug c++/113640] New: 'deducing this' lambda invoked multiple times unexpectedly hewillk at gmail dot com 2024-01-28 15:54 ` [Bug c++/113640] " hewillk at gmail dot com 2024-01-30 15:10 ` ppalka at gcc dot gnu.org 2024-01-30 15:45 ` cvs-commit at gcc dot gnu.org 2024-01-30 15:46 ` ppalka at gcc dot gnu.org
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