For example this bug report was wrongly closed:
But I couldn't add a comment or reopen, so I had to create a new one.
That report was closed, as such comment posting was disabled. Based on the description in your bug report your statement was that timezone was not defined in time.h. It is defined in time.h:
__MINGW_IMPORT long timezone;
I see you've opened an additional report which sheds more light on the issue:
I will further respond there.