Questions tagged [debugging]

Debugging is a methodical process of finding and reducing the number of bugs, or defects, in a computer program.

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How to debug error in process sentinel?

I've recently switched to doom emacs, and for the most part it's working great. However, when I'm looking at a folder in dired-mode, if I copy a file using C the file is copied but *Messages* contains ...
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dired-do-delete fails to delete file

In Dired, with point on a file name, I invoke dired-do-delete and confirm. The line disappears, as it normally does when a file is deleted. But the file is not in fact deleted, as I can see by e.g. ...
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Proof general: Symbol’s value as variable is void: coq-prog-args

I'm trying to proof-assert-next-command-interactive, but get the following error in *Messages*: proof-activate-scripting: Symbol’s value as variable is void: coq-prog-args. I haven't found an ...
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Debugging for Elisp threads?

Let's say some package does (make-thread (lambda () (message "Started thread.") (error "Fit happens.") (message "Finished thread."))) Regardless of M-x ...
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40 views

Julia mode in MacOS

I updated my macOS from Big Sur to Monterey and found that my julia command does not work. Specifically, I use the following init.el. So far, I could send line using C-return but, now I got a message &...
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emacs 26.1 "Symbol’s function definition is void: bibtex-completion-candidates-formatter"

I have updated to Emacs 26.1. and reinstalled all packages. When running helm-bibtex, the bibliographies are loaded, but then the process terminates with the following error message: helm-bibtex-...
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recursive require of slime error when trying to require symex

I'm getting the following error when doing (require 'symex) or (use-package symex). Error (use-package): symex/:catch: Recursive ‘require’ for feature ‘slime’ This is emacs 27.1 on Ubuntu 21.10 and ...
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`void-variable: Symbol’s value as variable is void: v` when deleting remote directory in dired

This recently started happening. Whenever I try to recursively delete any remote directory from dired (i.e. D over the dired entry), I get this after Emacs asks me for confirmation: void-variable: ...
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123 views

`while` is hanging

(defun test (n) (let ((list1 ())) (while (< (length list1) 10)) (push (random n) list1) list1)) I'm trying to add (random n) to list1 while the length of list1 is ...
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54 views

What's this `slot-missing: Invalid slot name: "#<forge-database forge-database-156f3376b4d8>", :file`

I somehow messed up my magit/forge db, and now emacs won't forgive me. Now I can't open magit's status buffer, and sometimes not even a file buffer opens. This is all I can gather from the Messages ...
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Find out where "Text is read only" coming from

My workflow involves converting a huge generated org-mode document that is created in a read only buffer and is automatically put together. When trying to export it to latex, sporadically I get the &...
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debugging why emacs is autoformatting on save hook

I'm currently facing an issue where I am trying to save a file, but some save hook is triggering an auto formatting the file in a way that I do not want. I am not sure how to debug this issue. Ideally,...
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dired--unhide: Buffer is read-only: #<buffer bufferName> when set bookmark in a dired buffer

When I use C-x r m in a Dired buffer to add this directory to my bookmark, it complains: dired--unhide: Buffer is read-only: # The enabled minor modes in this buffer include: Async-Bytecomp-Package ...
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shell-resync-dirs hangs

When I run shell-resync-dirs 1, the function hangs, until I press C-g, at which this point, what looks suspiciously like the output of my shell's dirs -l command 2 gets inserted into my buffer at ...
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How are program arguments handled when a program/script is launched from Emacs?

I often find myself wondering how people handle program arguments when they are developing with Emacs. Let's say we have a Python script test.py and launching it requires supplying arguments, e.g. --...
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Error sending mail via mu4e

I get the following error after sending mail via mu4e: Error (message-sent-hook): Error running hook #[0 "\301\302\303 !\207" [mu4e-sent-func mu4e-sent-handler mu4e~proc-sent buffer-file-...
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Unable to open files for editing with GPG + EasyPG

I have been using GPG + EasyPG for encrypting/decrypting files on my Macbook. Recently, I moved to a new Macbook and tried setting things up similar to my previous setup. However, while the files are ...
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package-load-descriptor: End of file during parsing

I've encountered this error on an Arch Linux system running Emacs-27.2. I sync my Emacs ~/.config/emacs/init.el which calls a host of other files located under ~/.config/emacs/settings/*-settings.el ...
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Emacs 27: How to jump to backward found word when switched into reverse incremental search?

I am trying to apply following solution(How to jump to backward found word when switched into reverse incremental search?) into Emacs >27.1, (which works in emacs 26.3): (define-advice isearch-...
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New `wrong-number-of-arguments` error from `desktop-change-dir` and other commands

(This has started happening with other commands too, but I don't remember which.) Previously when I ran M-x desktop-change-dir I would be prompted to enter a folder, whereupon Emacs would load the ....
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Org Quote Face not responding to CJK font

Org Quote face doesn't seem to be responsive to CJK font settings. The following custom settings: '(org-quote ((t (:extend t :background "black" :slant italic :foundry "GOOG" :...
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89 views

How to find the function that is run after cursor is moved?

I am working with a highly customized emacs configuration that is not built by me and it highlights all the words in the buffer that match the word under the cursor. How to find the function that ...
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53 views

"inspect element" for GUI elements?

Is there a way to "inspect elements" for Emacs? e.g. In Firefox, I would open the developer tools, select this icon: Then pick an element on the page to get information on it. For an ...
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45 views

Function add-variable-watcher does not watch "last-command" variable

I have added a watcher function to watch the last-command variable. (defun my-watch (symbol newval op where) (message "Hello")) (add-variable-watcher 'last-command #'my-watch) The ...
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1answer
37 views

gdb input/output buffer not working

I start gdb (with many-windows) through projectile-run-gdb but stdin/out is not displayed in the input/output buffer. And I have no clue where to look for the issue. Google search did not bring up any ...
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81 views

How to automatically open the debugger whenever `kill-buffer` is invoked?

I'm using Elpy for Python development, and when I run code with C-c C-c the source buffer closes -- which I don't want. Have to constantly reopen. One idea is to set a breakpoint in kill-buffer - ...
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Cannot navigate to recent projects in emacs dashboard: "Symbol's function definition is void: nil" error

Recently, I have not been able to open any of my recent projects that show up on the dashboard screen (package emacs-dashboard). If I move my cursor over one of the projects and press enter nothing ...
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34 views

Why is Emacs Entering the Debugger despite a condition case wrapper?

The context of my question: I was editing some clojure code, and point was inside a comment, and to the right of three characters: `abc'. I ran the command: M-x company-diag, to ask company mode for a ...
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67 views

Emacs elisp debugger: How do i make the debugger jump to source when i press s?

The builtin elisp debugger (i.e. the regular one, debug, not edebug) has a default binding of s to command backtrace-goto-source. When I try to use it, it says: Source code location not known You can ...
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67 views

Can't disable font-lock-mode

If I have font-lock on and I do M-x find-library RET simple RET, I have colours: If I then M-x font-lock-mode to disable the mode, the colours disappear in the currently-visible portion of the buffer:...
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1answer
75 views

How to debug an Emacs that stops taking input and needs to be restarted every few hours, but doesn't throw any errors

I've been having a problem lately where every few hours of use, for some reason I don't understand, Emacs stops responding to input without throwing an error. C-g and Esc-Esc-Esc do nothing, so I'm ...
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152 views

Why am I getting Wrong type argument: stringp, nil?

What's wrong here ? It gives me the error Wrong type argument: stringp, nil. (let* ((filename (file-name-nondirectory buffer-file-name)) (executable (file-name-sans-extension filename))) (...
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1answer
88 views

"#+STARTUP: hideblocks" won't work. Can't find offending package/setting

After I upgraded to Org Mode 9.4.5, I learned about the startup option hideblocks, but it won't work as advertised for me. OK, when I start emacs with the flag -Q, it did, so I went hunting for ...
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36 views

query-replace within LaTeX/Math

The answer below was taken from https://stackoverflow.com/a/44913296. This is the most upvoted answer there. Unfortunately, after running the code (for example by replacing q with \theta) one ...
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86 views

elpa.gnu.org:443 has a running process;kill it? message at install AUCTeX package on emacs 27.1 on windows 10

Trying to install AUCTeX on emacs 27.1 on Windows 10, when install AUC TeX through manage emacs packages when press install while the process work appears this mesage Buffer "*http elpa.gnu.org:...
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113 views

emacs crashes at least 10 times a day

9 out of 10 times it happens when invoking magit with C-x g. I noticed (sometimes) pressing 'g' for refresh inside a dired buffer crashes too. There's no error shown. My -nw emacsclient just lands in ...
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118 views

Emacs hangs/crashes when opening files with special unicode characters, does not crash with -nw

I'm using Arch Linux, i3wm and emacs 27.1, and I'm having an issue where emacs hangs when opening certain files, but I can't seem to find a pattern as to which files cause the hang. When emacs hangs, ...
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1k views

Emacs won’t access Documents directory on MacOS Big Sur

I am running Emacs 26.3 on MacOS 11.2.1 “Big Sur”. When I try to open the directory ~/Documents, it fails with the message “Listing directory failed but ‘access-file’ worked.” Emacs.app is given ...
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113 views

File mode specification error: (wrong-number-of-arguments (1 . 2) 0)

When I start my emacs I keep seeing following message on the minibuffer. How can I detect that which function causes this error message, in order to fix it? File mode specification error: (wrong-...
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47 views

void-variable battery-status-function [duplicate]

I'm trying to set up a custom battery indicator in the mode line and I'd like to use the battery-status-function variable defined in battery.el, which is a part of emacs. However, I cannot use it in ...
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1answer
94 views

Portacle Emacs C-c C-c stopped working

I am a beginner Lisp programmer and new to Emacs. I work on Portacle. I must have done something because when I press C-c C-c to compile a function in a buffer I get: C-c C-c is undefined. This worked ...
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680 views

How do I solve `Lisp error: (void-function -compose)` when using lsp-dart?

When I load a Dart file with GNU Emacs 27.1-1 for OS X I get the following little error novel. Debugger entered--Lisp error: (void-function -compose) (-compose #'lsp--client-path->uri-fn #'lsp--...
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121 views

Tramp hangs indefinitely when using doas on Linux

Tramp works fine when I try to edit with sudo or ssh, but when I try to edit with doas it will hang (while also maxing out my cpu). Here is some tramp output: backtrace() tramp-signal-hook-...
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How can one debug a situation when emacs is unresponsive on Windows?

There is an operation in my setup which makes emacs unresponsive with high CPU. I checked the emacs process with process monitor, but it does not wait for an other process, so I guess it must be ...
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50 views

Debuggable emacs and vanilla emacs binaries

I'm running Ubuntu 20.04. I would like to build an emacs binary for general usage (no debug symbols) and another emacs binary (when something goes wrong). The build is pretty straight-forward, but I ...
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64 views

How to debug emacs config / need to rerun org-mode after startup

I run emacs on Windows and I start with this command: C:\path-to\emacs.exe -q --load "C:/path-to-git-tracked-config-folder/.emacs" --debug-init Emacs starts without error from --debug-init. ...
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51 views

Why does every command with `M-x cider-jack-in` raise an error?

Anyone knows why any command whatsover comes up with this error? ;; Startup: /usr/local/bin/clojure -Sdeps '{:deps {nrepl/nrepl {:mvn/version "0.8.3"} cider/cider-nrepl {:mvn/version "...
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163 views

org-capture: Capture abort: Wrong type argument: stringp, org-main-file

I know this error has come up here before, but none of the answers thus far have been able to help me and no amount of googling has got me anywhere. I've been using org-capture-templates for quite a ...
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1answer
47 views

inludegraphics macro does not ask for width etc. but only for llx, lly

Using GNU Emacs 26.3, I have a tex file with \usepackage{graphicx} and AUCTeX enabled. However, inserting a includegraphics macro does not prompt for the optional arguments defined in graphicx.el ...
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savehist-mode: Lisp error: (void-variable pell-buffer)

I am using GNU Emacs 26.3 in macOS. For (savehist-mode 1) I keep getting following error: Debugger entered--Lisp error: (void-variable pell-buffer) signal(void-variable (pell-buffer)) savehist-...

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