Draw is sometimes crashed unexpectedly during running of test command

When running under debugger, the following debug assertion is raised:

Program: D:\git\occt1\build\win64\vc12\bind\DRAWEXE.exe
File: f:\dd\vctools\crt\crtw32\lowio\dup2.c
Line: 59

Expression: (fh1 >= 0 && (unsigned)fh1 < (unsigned)_nhandle)


The stack trace is shown:

     msvcr120d.dll![revision removed]() Unknown
> TKDraw.dll!`anonymous namespace'::capture_end(OSD_File * tmp_file, int std_fd, int save_fd, std::basic_ostream<char,std::char_traits<char> > & log, unsigned int doEcho) Line 90 C++
     TKDraw.dll!CommandCmd(void * theClientData, Tcl_Interp * interp, int argc, const char * * argv) Line 203 C++

The line in our code is (Draw_Interpretor.cxx):

89: dup2(save_fd, std_fd);

It seems assertion is raised during duplication of the standard error channel.

Error disappears if we turn off logging, either by running "dlog off" command, or by adding "1" option to the end of "test" command.

On my home computer similar problem is reproduces as follows:

1. Copy text "test perf bapline intersect" to buffer
2. Start DRAW
3. Paste the text
4. Press Enter
==> The test starts but crashes with message "error writing "stdout": bad file number"

Notably if the same text is input directy instead of copy / paste, it works OK

This is not for my work PC. This test always work OK.

This bug has been fixed with #0027620.
Please close it.