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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161 views

Error encountered when adding melpa to package-archives

I'm using emacs 25.2.1 (built from source). A strange problem happened after I tried to configure it for editing tex files. The suspicious config file content is listed below. (require 'package) (...
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1answer
154 views

Symbol's function definition is void: pdf-tools-install after succesfull Installation with nor error messages

I tried to install pdf-tools under emacs 24 and Ubunt 16.04, like I did it several times succesfully. But now I get the error messages: Symbol's function definition is void: pdf-tools-install PDFs ...
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1answer
176 views

How to troubleshoot random hangs / pauses?

Short of building a debug version of emacs and adding break points. Whats the best way to know whats happening during a 'pause' while emacs runs? (assuming the pause is long enough to manually run an ...
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1answer
31 views

pabbrev-mode idle timer error

I have installed again pabbrev and whenever I activate the mode I constantly get theses 2 errors. Error running timer ‘pabbrev-idle-timer-function’: (invalid-function pabbrev-debug-message) Error ...
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1answer
70 views

How do I debug when match-data is not getting set?

Lately, I have seen some cases where I use re-search-forward to find a pattern, and then try to do something with the match, only to find that the match-data is apparently not correct. For example, ...
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2answers
274 views

Problems loading packages from repos in another emacs directory

I want to test a new configuration from emacs for that case I begin with this: emacs -q --load ".emacs.jesus.d/init.el" --debug-init it works and I load the emacs file, until I started to download ...
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2answers
212 views

How to Debug Javascript in HTML in Webmode.el

I am new to Emacs webmode. I was wondering how to debug javascript embedded into my html page using webmode.el. The script is in the <script> tag. I'd like to see break lines and see the values ...
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1answer
549 views

Cryptic startup error messages

I just started out on emacs so this might have a really simple answer. I'm getting an error message on startup and have no idea what it means. The debug message doesn't help much either. What do ...
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21 views

org-mind-map unable to find flatten and dot command

I get the following error when running org-mind-map. Paths the each are as follows: $ which unflatten /usr/local/bin/unflatten $ which dot /usr/local/bin/dot How to tell org-mind-map to access ...
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1answer
33 views

Ditaa source code evaluated with no result

The code below evaluated successfully but ~/Downloads/foo.png is empty. A look at the downloads folder shows that no file has been generated. What went wrong? #+begin_src ditaa :file ~/Downloads/foo....
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22 views

`scad-mode` (derived from CC Mode) hangs Emacs. How to debug/fix?

I have found that scad-mode.el, a derived mode from CC Mode, which can be found here: https://github.com/openscad/openscad/blob/master/contrib/scad-mode.el hangs emacs if I type #( into the window,...
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20 views

org-insert-link sometimes produces “wrong type argument: stringp, nil” after prolonged use of emacs

It usually happens after a couple of days of use that C-c C-l / org-insert-link inside .org files does not allow me to insert new links anymore. What I want to do is interactively insert link ...
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50 views

Why an error when calling a command in a specific buffer?

Q: why do I get errors when calling a command from a specific buffer, but not in any other buffer? Scratch all of what I had previously said about call-interactively (see strikethrough below for ...
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29 views

org-mode internal link works only in some cases

I have an .org document with the following structure. * Headline 1 This is some text * Headline 2 :Custom_id: h2 This is heading number two ** Sub heading 1 <<target>> ** Sub heading ...
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28 views

org-ref “Unbalanced parentheses”, 20306, 18248 error

I am new to org-mode and I am learning to use it to replace markdown for academic writing. M-x org-ref gave me this error: org-ref "Unbalanced parentheses", 20306, 18248 error What should I do ...
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0answers
19 views

Some lisp errors not showing a backtrace

I have a few custom written methods in my init file. They run in to null issues - too often :) Anywhen, I noticed for some errors emacs pull up a backtrace/debugger prompt for me. But often the error ...
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12 views

`gud-print` results in “Text is read-only” message

Whenever I run gud-print (C-xC-aC-p) with my cursor positioned on a variable while debugging with GUD (specifically via the gdb command), I get the message "Text is read-only" in the echo area. I can'...
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19 views

pop-to-buffer: Wrong type argument: window-valid-p, #<window 117>PNG warning: Interlace handling should be turned on when using png_read_image

I occasionally run into the following error when opening a new file with projectile: pop-to-buffer: Wrong type argument: window-valid-p, #<window 117>PNG warning: Interlace handling should be ...
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45 views

end of file during parsing during org-mode export to latex

I have a weird thing going on with emacs on Fedora 29. Once in a blue moon, my Emacs will go HA! you cannot export to LaTeX with the "error": end of file during parsing during. However, if I move ...
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1answer
27 views

Wrong type argument: symbolp, possible mismatched parenteses in .spacemacs

I am trying to apply a fix to make it easier to change todo status in org mode. The code is the following: '( (org :variables org-want-todo-bindings t) ) from https://github.com/syl20bnr/...
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25 views

Emacs flashes when changing buffer with `ido-switch-buffer`

When I change buffer via ido-switch-buffer and enter a python buffer my entire Emacs flashes visually for a second. If I handle other files the same way, it does not. What can be the reason for that? ...
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37 views

Ctrl-g will stop Emacs(terminal) and send it to background, ending with core-dump

I'm using Ubuntu server without GUI(ssh into the server), so I use Emacs in terminal, but since the first day I use it, Ctrl-g will stop Emacs and send it to background multiple times one day, it is ...
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1answer
52 views

Invalid function: treemacs-block

I use treemacs for project management. For some reason (even if I don't have treemacs buffer opened) when I try to launch Dired for the first time I get invalid function: treemacs-block What is even ...
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179 views

Spacemacs error when loading `.spacemacs` which uses package `flycheck`

I added the following at the end of my ~/.spacemacs file: (use-package flycheck :defer t :init (global-flycheck-mode)) When I do this, I get Spacemacs encountered an error while loading your '/...
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47 views

Unknown *emacs* process

I recently realized that every time I lunch emacs, after a minute, a strange buffer appear in buffers list that is linked to an emacs process, infact it also appear in system's process list: When I ...
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1answer
39 views

Why do parts of my Emacs buffer turn invisible when I'm writing elisp?

When I'm writing elisp code, parts of the buffer that I press enter on turn invisible (i.e. they get the property invisible set to t). I haven't been able to reproduce this reliably, because it doesn'...
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47 views

Slime inspector for emacs lisp

I want to know, if there is some possibility of inspecting an object as slime inspector does. For example, using libyaml I get the following result, it worked well: ELISP> (yaml-read-from-string ...
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25 views

fault-tolerant `check-parens` resp. `scan-lists`

Looking for a way to have a fault-tolerant navigation. I.e. in case of broken syntax, uncomplete forms etc. --when check-paren fails--, it should try some heuristics. Unfortunatly can't use check-...
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18 views

helm-comint-input-ring - get error: shell-mode-map

windows 10, emacs 26.1, helm 3.0 I use C-c C-l (comint-dynamic-list-input-ring) I get something like this: But I don't like this. I want to use helm-comint-input-ring. I want to get something like ...
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211 views

(wrong-type-argument number-or-marker-p nil) when calling run-python

When I call run-python from the package python.el Emacs displays me the following error: error in process filter: Wrong type argument: number-or-marker-p, nil To investigate further I called toggle-...
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200 views

Disabling recentf mode?

I try to disable this via (recentf-mode -1) (setq recentf-mode nil) ;; mysteriously switches to t after some time but it keeps automatically turning on after some time and is causing problems for ...
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39 views

Debug missing keystrokes

Something has happened to my Emacs environment that causes keystrokes to be dropped occasionally. It seems to happen more often in isearch, or after a week and a couple hundred buffers open. The ...
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1answer
286 views

override “C-SPC” set-mark-command

I'm using expand-region and experimenting with it trying to find the right key binding As per expand-region README it binded to (global-set-key (kbd "C-=") 'er/expand-region) But I'm not satisfied, ...
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50 views

C-S-a doesn't select text to the line beginning

The Key combination Ctrl + Shift + a doesn't work in my GUI-Emacs to select a region from the position of pointer to the line start. Doing C-h k and the above key combination shows no documentation.
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277 views

The Application Emacs is Not Open Anymore (macOS High Sierra)

I am using Emacs (25.2.1) on macOS High Sierra 10.13.2, and when trying to open a simple .txt file using Emacs as the editor, I get the error "The application Emacs is not open anymore". Details: ...
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2answers
105 views

Bad sexp error on custom diary function

I've created a diary function to allow me to record cyclic events. So something like (diary-limited-cyclic-weekday 8 '(0 3 6) 01 01 2018) will create an event for every Sunday, Wednesday, and ...
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40 views

Unable to run browse-kill-ring

After installing the browse-kill-ring package under Emacs 24.5.1, I get the following error when running the browse-kill-ring command: font-lock-set-defaults: Wrong type argument: symbolp, (font-...
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0answers
47 views

Detect variable use in an elisp function at run time

I try to understand a piece of elisp source code, with many nested and conditional functions calls, and I would like to know if a particular variable is used (and, if so, where in the code) at run ...
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151 views

Emacs hung with Error running timer 'blink-cursor-start'

I just installed a fresh Ubuntu 17.10 on a Dell XPS 15, and then installed Emacs from the repos with apt-get in the normal way. The moment I start Emacs, I get the error message Error running timer '...
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0answers
117 views

Slow Emacs at editing elisp files

When editing .el files my Emacs is very slow. The larger the file, the worse it behaves, it is especially visible while scrolling or using autocompletion of any kind. It becomes pretty visibly slow at ...
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217 views

toggle-debug-on-error only works for the first error, how can i fix this?

when I enable debug on error it works perfectly the first time. when I go and fix my error and rerun my function debug on error no longer triggers for new errors. Is there a way to enable it so ...
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256 views

Error when initializing Emacs

This is what I get when starting Emacs from terminal with emacs --debug-init. I don't know the reason why emacs suddenly started to not working. Debugger entered--Lisp error: (wrong-type-argument ...
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1answer
383 views

Debugging emacs 24.5 slow startup (WSL)

I'm running emacs24-nox on Ubuntu trusty on Windows Linux Subsystem, and I'm trying to figure out why the startup time is slow. I've inspected the startup with strace and found two calls to poll that ...
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1answer
42 views

Need help to debug an issue with query-replace command

The query-replace command used to work perfectly for me. Recently, it fails with a symptom like this: [updated] Assuming the code looks like: (for example) set_flaag(var1); set_flaag(var2); Now I ...
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51 views

how to debug who move cursor

I have very annoying problem, after I run M-x compile time to time cursor jump from middle of buffer to the first line. I want to find out culprit (I found mode who responsible for this, but I want ...
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1answer
684 views

doc-view not working with emacs 25.2.1. (x86_64-w64-mingw32)

I am definitely no newbie and I think I now followed every little advice I could find online, and after 2 days doc-view is still not working :-( (it works fine on my older laptop under windows 10) On ...
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1answer
134 views

emacs org-mode error during installation in windows

While I try to install org-mode using M-x package-install RET org RET, I am getting the following error. I am new to both emacs and org-mode and using Windows 10. Debugger entered--Lisp error: (void-...
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1answer
97 views

debugging segmentation fault when using `prin1`

Q:  How can I narrow down this gdb backtrace to a specific character, or set of characters, that is causing a Emacs to suffer a segmentation fault when using prin1? Program received signal SIGSEGV, ...
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188 views

Help with debugging emacs, when opening routes.rb from rails applications

I'm using emacs for my every day tasks, I started more or less 4 years ago, and now I'm very happy with emacs. maybe I have a lot of plugins working together. This is my-ruby configuration file I ...
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1answer
25 views

Removing old name /tmp/docview1000 warning

When starting emacs I get the following warning: Warning (initialization): an error occurred while loading '/home/jamesbond/.emacs': File error: Removing old name, no such file or directory, /tmp/...