Zlib - Run Time Check Failure #3 (unitialized variable)
Build and install Ruby 1.9.1 with -RTC1 with VC2008.
Then at the command prompt:
gem install libxml-ruby (you can use any gem)
Then you get:
Run-Time Check Failure #3 - The variable 'guard' is being used without being initialized.
This is in ext/zlib/zlib.c at line 721.
Patch is simple, initialize guard to Qnil.