https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90887
Bug ID: 90887
Summary: [10 Regression] r272186 causes -fcompare-debug failure
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
CC: redi at gcc dot gnu.org
Target Milestone: ---
The commit r272186 causes that our program fails with -fcompare-debug
That's somewhat odd as it is a libstdc++ change, which shouldn't cause this.
Admittedly, I did only incrementation builds for the bisecting, but it is
robust: going to this revision causes the fail and going to the version before
works.
Triggering the bugs is not that simple - in my case, it only fails for
g++ ... /full/path.cc
even using ../rel/path.cc made it pass; likewise compiling with "-E" will
produce a file which does compile.
The options required also don't make much sense; the reduced options were
(besides includes/defines):
g++ -std=c++2a -fcompare-debug -Woverloaded-virtual -Wlogical-op -g3 -Wall
-fsanitize=float-cast-overflow -fsanitize=float-divide-by-zero
-fsanitize=undefined -fno-sanitize=vptr,null
The commit which triggers the issue is r272186
Author: redi <redi@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed Jun 12 14:52:02 2019 +0000
Replace std::to_string for integers with optimized version
I will try to drill a bit deeper to understand what goes on.
