How to report bugs effectively [www.chiark.greenend.org.uk/~sgtatham]
This essay is a classic ! I did not bookmark it last time I had read it, it's worth to have it always by hand.
I should probably inspire myself and write something similar for our community. A user shares frequently details in a manner: "It does not work, please help me."
No platform, compiler or the line of code or at least function where it crashed or surprisingly returns an unexpected value.