I had similar experience in past. I submitted a bug report in a small library, the author/owner just rudely talked about that I should not expect him to work for free, and closed the bug. I would have been happy if it was tagged as non priority bug and did not get resolved in near future, but the already existing open bug report accepts the validity of bug and is an invitation for any willingful contributor.
I believe submitting a bugreport itself is a contribution. I know it does not mean that the developer is liable for fixing it or improving it, but if it's a valid bug at least they should politely refuse to fix or even just ignore it and let it be open.
I believe submitting a bugreport itself is a contribution. I know it does not mean that the developer is liable for fixing it or improving it, but if it's a valid bug at least they should politely refuse to fix or even just ignore it and let it be open.