I have written tens of thousands of lines of code using Crystal. Created several mature applications.
In the meantime, I have encountered many compiler bugs. Some of them have already been recorded, and some are my own feedback.
I think it is necessary to emphasize that Crystal is not very perfect at present. If you encounter problems, you should immediately ask the community for help. Otherwise the learner may take a long time to find the problem or eventually give up.
PS: Bringing learners here can also make this forum even more lively.