Emacs tip: getting garbage in a traceback from byte-compiled functions? Go to the last function's definition and do eval-buffer in the file.
miniblog.
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Lovely traceback polish in Java 14: reporting which expression returned null in foo().bar().baz()!
This is also useful if something is making Emacs slow. SIGUSR2 gives you a traceback, whereas C-g just stops whatever it is. https://twitter.com/_wilfredh/status/659499112677642242
Django's loaddata command does not give you full tracebacks by default. Argh. Turns out there's a --traceback command line argument though.