How good are your error messages? Wouldn't it be nice if there was a tool that told you if your error messages were unhelpful?
Proactive Detection of Inadequate Diagnostic Messages for Software Configuration Errors https://homes.cs.washington.edu/~mernst/pubs/inadequate-diagnostics-issta2015.pdf
miniblog.
Related Posts
Compiler error messages is such a deep topic. Even in rustc, a mature compiler that invests effort in diagnostic quality, I find interesting issues every few months.
(The majority have been fixed pretty quickly, so it's really rewarding to file issues.)