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Re: toolchain/54411: std::locale broken

The following reply was made to PR toolchain/54411; it has been noted by GNATS.

From: Thomas Klausner <>
Subject: Re: toolchain/54411: std::locale broken
Date: Sat, 27 Jul 2019 18:12:15 +0200

 Thanks for the feedback.
 I included the clang++ output for completeness. I want the g++
 exception fixed, since that is still the default compiler.
 I tried fixing the program according to your suggestions, but my c++
 is probably not good enough;
 # g++ locale.cpp
 # ./a.out
 terminate called after throwing an instance of 'std::runtime_error'
   what():  locale::facet::_S_create_c_locale name not valid
 zsh: abort (core dumped)  ./a.out
 # clang++ personal/netbsd/locale.cpp
 # ./a.out
 Thousands separator for en_US is '44'
 Thousands separator for de_DE.UTF-8 is '46'
 Thousands separator for fr_FR.UTF-8 is '-62'
 #include <iostream>
 #include <locale>
 using namespace std;
 void print_thousands_separator(const char *localestring)
     std::locale loc = std::locale(localestring);
     wchar_t thou_sep = std::use_facet<std::numpunct<wchar_t> >(loc).thousands_sep();
     cout << "Thousands separator for " << localestring << " is '" << thou_sep << "'" << endl;
 int main() {
 But as I said, the locale problem with the french locale doesn't
 matter to me as much as the "terminate" with g++.

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