https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108556
Bug ID: 108556
Summary: std::sort changes objects' member values
Product: gcc
Version: 11.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: gnu.iodaj at simplelogin dot com
Target Milestone: ---
When working on a project, I tried using std::sort to sort a vector of objects,
and it resulted in a crash. After looking closer, valgrind reports lots of
invalid writes and the data is effectively modified during the sort.
This issue doesn't happen with stable_sort nor with small enough vectors.
The g++ versions tested are 11.3.0 and 12.1.0.
The system is a Dell Precision 5570 running Linux Mint 21.
g++ command is g++ -Wall -Wextra sort-bug.cpp (file in attachment)
The compiler output is none (no warnings, no errors, no line displayed)
Please find the attached file that serves as a minimal working example of this
bug.
Thank you.
