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From: "arakawamasahiro at jp dot fujitsu.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/113761] New: Abnormal program termination using
 libstdc++
Date: Mon, 05 Feb 2024 08:38:34 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: libstdc++
X-Bugzilla-Version: 12.3.0
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: arakawamasahiro at jp dot fujitsu.com
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113761

            Bug ID: 113761
           Summary: Abnormal program termination using libstdc++
           Product: gcc
           Version: 12.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: arakawamasahiro at jp dot fujitsu.com
  Target Milestone: ---

If you compile the following program with g++-11.4.0 and run it using libst=
dc++
12.3.0, the executable program will terminate abnormally.

[program(test.cpp)]
#include <iostream>

#include <random>
#include <cassert>

double f(double x)
{
    return x*2;
}

int main()
{
    typedef std::piecewise_constant_distribution<> D;
    D d({}, f);
    std::vector<double> iv =3D d.intervals();

    return 0;
}

[Compile and execute log]
$ g++ test.cpp
$ LANG=3DC; ./a.out
terminate called after throwing an instance of 'std::length_error'
  what():  vector::reserve
Aborted (core dumped)

The {} specified in the first argument of variable d in the std::
piecewise_constant_distribution<> class reduces the list size to 0.
Given the constraints of the constructor of the std::
piecewise_constant_distribution<> class, you should expect a pattern where =
the
list size is zero.=