[llvm-bugs] [Bug 47903] New: Possible bug in std::sort

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47903

            Bug ID: 47903
           Summary: Possible bug in std::sort
           Product: libc++
           Version: 10.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: alexandru.croitor at qt.io
                CC: llvm-bugs at lists.llvm.org, mclow.lists at gmail.com

Created attachment 24076
  --> https://bugs.llvm.org/attachment.cgi?id=24076&action=edit
std::sort crash repro

Hi, I may? have found a bug in libc++'s std::sort() that causes a craash.

I didn't dig too deep except for creating a minimal repro.

Stumbled upon this as part of a bigger project (Qt Creator), but reduced it to
the code in the attachment.

Reproduced it on macOS 10.15.7 + Xcode 11.6 Build version 11E708 

As well as Ubuntu 18.04 clang 10.0.0 (unpackaged from releases.llvm.org) + a
self-built libc++ from git master ( 86ef379800162e5d6bb0d478c5bfb4b56498a272 )

building with the following script

 $ cat make.sh
 #!/bin/sh -x

 export PREFIX=/home/alex/Dev/llvm-project/build/installed
 export CLANG_PREFIX=/home/alex/Dev/clang10/bin
 export CFLAGS="-nostdinc++ -I$PREFIX/include/c++/v1"
 export LFLAGS="-L$PREFIX/lib -Wl,-rpath,$PREFIX/lib -nostdlib++ -lc++"
 $CLANG_PREFIX/clang++ -c -pipe $CFLAGS -O2 -std=gnu++11 -Wall -Wextra -o
main.o ../main.cpp
 $CLANG_PREFIX/clang++ -ccc-gcc-name g++ $LFLAGS -o proj main.o -v

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20201019/7cb9fe8b/attachment-0001.html>