boost/process/detail/posix/wait_for_exit.hpp -> wait_until -> handler_func crash

start mgr process
kill read process
kill write process
crash in "boost/process/detail/posix/wait_for_exit.hpp" -> "wait_until" -> "static void handler_func(int val)"

environment
Target: x86_64-linux-gnu
Thread model: posix
gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)
boots 1.81.0

mgr process (example)
////////////////////////////////////////////////////////////////////////
//
#include
#include
using namespace std;

#include
using namespace boost;

void func1()
{
error_code ec;
process::child cp;

cp = process::child("/opt/project/board/src/test/process/read/build/read");
cp.wait_for(std::chrono::seconds(100000), ec)
}

void func2()
{
error_code ec;
process::child cp;

cp = process::child("/opt/project/board/src/test/process/write/build/write");
cp.wait_for(std::chrono::seconds(100000), ec)
}

int main()
{
std::thread th1 = std::thread(func1);
std::thread th2 = std::thread(func2);

th1.join();
th2.join();

return 0;
}

write process (example)
////////////////////////////////////////////////////////////////////////
//
#include
#include
#include
using namespace std;

int g_stop = 0;

void onSignal(int sig)
{
cout << "write onSignal, sig=" << sig << endl;

g_stop = 1;
}

int main()
{
cout << "write start ..." << endl;

::signal(SIGINT | SIGKILL | SIGTERM, onSignal);

while (g_stop == 0)
{
::usleep(1000);
}

cout << "write end" << endl;

return 0;
}

read process (example)
////////////////////////////////////////////////////////////////////////
//
#include
#include
#include
using namespace std;

int g_stop = 0;

void onSignal(int sig)
{
cout << "read onSignal, sig=" << sig << endl;

g_stop = 1;
}

int main()
{
cout << "read start ..." << endl;

::signal(SIGINT | SIGKILL | SIGTERM, onSignal);

while (g_stop == 0)
{
::usleep(1000);
}

cout << "read end" << endl;

return 0;
}