[Boost-bugs] [Boost C++ Libraries] #13611: SEGFAULT when logging std::to_string(NAN)

Subject: [Boost-bugs] [Boost C++ Libraries] #13611: SEGFAULT when logging std::to_string(NAN)
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2018-06-19 23:19:16

#13611: SEGFAULT when logging std::to_string(NAN)
------------------------------+-----------------------------
 Reporter:  Filip Matzner     |      Owner:  Andrey Semashev
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  log
  Version:  Boost 1.67.0      |   Severity:  Problem
 Keywords:                    |
------------------------------+-----------------------------
 Consider the following code:
 {{{
 #include <climits>
 #include <boost/log/trivial.hpp>

 int main()
 {
     BOOST_LOG_TRIVIAL(info) <<
 std::to_string(std::numeric_limits<double>::quiet_NaN());
 }
 }}}

 When compiled with:
 {{{
 g++ -std=c++17 -DBOOST_ALL_DYN_LINK -pthread -lboost_log -O3 test.cpp &&
 ./a.out
 }}}

 It crashes with SEGFAULT. If I replace BOOST_LOG_TRIVIAL(info) with
 std::cout, it does not.

 System:
 {{{
 [floop_at_pine /tmp ]$ g++ -v
 ...
 gcc version 8.1.1 20180531 (GCC)
 [floop_at_pine /tmp ]$ uname -a
 Linux pine 4.16.13-2-ARCH #1 SMP PREEMPT Fri Jun 1 18:46:11 UTC 2018
 x86_64 GNU/Linux
 }}}

 Note that the SEGFAULT does not happen with clang++, but only g++. It also
 does not happen with -O2, but only -O3. It might also be a compiler bug,
 you will probably know better than me. :-)

-- 
Ticket URL: <https://svn.boost.org/trac10/ticket/13611>
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