I am attempting to edit a file. Emacs is preventing me from making the edit, and throwing: Args out of range: #<buffer user.action.js>, 4965, 17721. It is completely not obvious to me where this exception is coming from. How can I debug errors such as this one?
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Enable debugging via M-x toggle-debug-on-error or in the menu Options => Enter Debugger on Error.
debug-on-error. Seems like the question has been asked, but I don't find a good duplicate. – Drew Sep 26 '18 at 16:00