meowking's Blog

When debugging my #emacs configuration, I find it is more useful to put (setq debug-on-error t) at the beginning of your init.el rather than using command line argument to start Emacs like emacs --debug-init. The reason behind this is that --debug-init seemingly only affect Emacs between starting Emacs and Emacs finishing loading your configuration, whereas your configuration may also affect Emacs’s behavior directly after loading. For example, you add a function to prog-mode-hook, and inside the function, u use variable buffer-file-name. Then Emacs may not behave well cuz scratch buffer is lisp-interaction-mode which is a derived mode of prog-mode and it is directly loaded after Emacs initialization.

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