Hi rickenxmas,
We need to isolate the problem.
Could you check the following?
1. Does gtags still crash if you do full update instead of incremental update?
$ gtags -vw --debug --gtagslabel pygments
2. Does gtags still crash if you do not add --gtagslabel pygments option?
$ global -uv
3. Is there any difference between gtags.exe run under emacs and gtags.exe run under msys environment?
Are they the same binary file or different ones?
4. Is there any difference between emacs environment and msys environment? e.g. environment variables, shell command, etc.. Different environment may cause different behaviour.
Thanks,