https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103853
Bug ID: 103853
Summary: std::forward_list::merge should check if __list !=
this
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: pavel.kryukov at phystech dot edu
Target Milestone: ---
Created attachment 52080
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52080&action=edit
check if __list==this in std::forward_list::merge
C++ standard does not require 'do nothing' if std::forward_list::merge argument
equals to 'this', however it does not say 'undefined behavior' or 'infinite
loop' too.
I've attached my patch to fix and test it, but since I'm not an experienced GCC
contributor, I don't know how to run the tests. Following instructions on
CONTRIBUTING page builds whole GCC ending with some problems with my machine. I
would be grateful if you tell how I can test only libstdc++.
