Today i tried to rebase my dev branch of OpenGL.pm on the latest changes and found that a segfault in OpenGL::Array was assumed to be fixed, despite still being alive and well. With nothing (haha) better to do i decided to poke at it and see if i could fix it. I foregrounded #xs on irc.perl.org in my IRC client and set to work. My first stumbling block came surprisingly soon:

How to print debug messages in XS?

Since i can't just step through XS in the perl debugger, i had to debug via printing to the command line. However the XS in OpenGL.pm seems to swallow all output to ST…