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From: "artur77 at freemail dot hu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/103664] New: std::regex_replace bug if the string
 contains \0
Date: Sat, 11 Dec 2021 21:52:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103664

            Bug ID: 103664
           Summary: std::regex_replace bug if the string contains \0
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: artur77 at freemail dot hu
  Target Milestone: ---

I think I found a bug in std::regex_replace.

The following code should write "1a b2" with length 5, but it writes "1a2" =
with
length 3.


#include <iostream>
#include <regex>

using namespace std;
int main()
{
    string a =3D regex_replace("1<sn>2", std::regex("<sn>"), string("a\0b",=
 3));

    cout << "a: " << a << "\n";
    cout << a.length();

    return 0;
}=