Submitting bugs

Make sure to review these points before submitting issues - thank you!

Make sure a similar issue doesn't exist yet: use the search box
Include reproducible code: we should be able to paste it into an editor, compile and run it and get the same error as you. Otherwise it's impossible for us to reproduce the bug.
Don't only use play.crystal-lang.org or carc.in: code might be lost and the issue will remain incomplete. Write code in the issue itself.
Reduce code, if possible, to the minimum size that reproduces the bug.
If all of the above is impossible due to a large project, create a branch that reproduces the bug and point us to it.
Include Crystal compiler version (crystal -v) and OS. If possible, try to see if the bug still reproduces on master.

Submitting questions

If the question is something like "how do I do X?", consider using StackOverflow
If the question is about a shard, consider asking the question in that shard