Questions tagged [debugging]

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

140 questions with no upvoted or accepted answers
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11
votes
0answers
580 views

Edebug orgmode source code blocks with input variables

What is the standard method to debug emacs-lisp orgmode source code blocks with input variables as header arguments? I found the hacky solution to insert the following snipped in front of a source ...
7
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0answers
728 views

Display all local variables within a edebug session

When using edebug one can get a local variable by command describe-variable (C-h v), but are there any ways to display all local variables? For example in Python you can call locals() in a pdb ...
6
votes
1answer
2k views

How do I change the working directory used by pdb/gud?

When running M-x pdb from Emacs, the current directory seems to be set to that of the directory of the script you are running, so pdb ~/path/to/project/__main__.py Would set the working directory ...
5
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0answers
1k views

How to debug C++ (dap-mode + LLDB or GDB)

I want to use dap-mode to debug a C++ code. Until now I followed instructions dap-mode (LLDB) and lldb-vscode. I further enabled the mode and UI via (dap-mode 1) (dap-ui-mode 1) When I execute dap-...
5
votes
0answers
105 views

How to investigate “color bleeding”?

I frequently have color-bleed issues in emacs, most often with AUCTeX: all of a sudden and for no apparent reason, the line I'm writing will be fontified as math. First things first: no, I do not ...
5
votes
0answers
707 views

Emacs typing backwards

So, sometimes when I go into a buffer that has a [ as the first character (such as .ini files) emacs suddenly starts typing everything backwards. In other words, if I press the keys y e s I get out s ...
4
votes
1answer
122 views

(RegEx-)Replace: Sporadic Match data clobbered by buffer modification hooks

I know this was asked in other contexts already, but I couldn't find anything related to C++ development with my hooks that could help me. I am working a lot with replace and query-replace and query-...
4
votes
0answers
377 views

list of current variables in a buffer for Python code

I would like to find a way to reproduce the "Workspace" of Matlab or the equivalent "Variables" window of the awesome pudb debugger directly in emacs for python code: it is a window which details the ...
4
votes
0answers
253 views

Is it possible to debug Django from gud-pdb?

Brand new to gud/pdb and I am trying to run the Django development server from emacs. I can't seem to set breakpoints that affect the running server, though. I am invoking PDB with M-x pdb, then ...
4
votes
0answers
305 views

Quitting emacs is very slow

Quitting my Emacs takes a really long time. Is there a good way to track what's happening while quitting Emacs? (So far I'm turning to git blame to figure out what changes I have made to cause this ...
3
votes
0answers
449 views

Tramp hanging on writing or opening file

Tramp consistently hangs, for me, when opening or writing a remote file. None of the ‘why is Tramp hanging...?’ resources I've found seem to address my situation. What's odd is that this used to ...
3
votes
0answers
613 views

Debugging in Unity3d with emacs?

I develop in Unity, and have been using emacs as my text editor for development. Debugging however has always needed to be done through monodevelop (and it crashes half the time while doing this). My ...
3
votes
0answers
117 views

Multiple Quit messages in my *Messages* buffer

When I hold C-p or C-n to navigate any page, the movement is jerky and I get multiple Quit messages in my *Messages* buffer. I checked the C-h l to see the commands ran, it only has the C-n [next-...
3
votes
0answers
204 views

Emacs/realgud/Python: How to display variables at each step?

Using emacs and realgud one can have a separate buffer that automatically shows where the program is currently stopped (by displaying that line of source code). Is there an easy way to get realgud to ...
3
votes
0answers
1k views

Spacemacs C++ debugging?

What tools are you using for setting Breakpoints visualize Variables within Spacemacs? I had a look at gdb but it felt awkward to set the breakpoints separated from the source files. I would like to ...
3
votes
1answer
259 views

`<dead-grave> is undefined`

for a few month, I use Emacs for Latex, and I am French. today (for the first time) when I use C-c ` to see my errors, Emacs answers <dead-grave> is undefined I try to add in my .emacs (...
3
votes
0answers
634 views

Emacs sometimes fails to save files

I'm experiencing a weird problem with Emacs on Windows where sometimes, after a while, the current buffer I'm in throws an error when attempting to save the file. I can't seem to reliably reproduce ...
3
votes
0answers
41 views

Display all internet connections during startup

How can I display all Internet connections that are used during startup? Sometimes I work in a low speed Internet environment and I would like to remove all the Internet connection code during startup....
3
votes
0answers
191 views

Why is emacs freezing and how can I prevent it? (likely involving org agenda)

What would cause emacs to "mostly" freeze when creating an org agenda? I say "mostly" because when you type C-g, it does show "Quit" in the minibuffer, and the time logging number in the minibuffer ...
3
votes
1answer
235 views

trace-redisplay: How to see stderr from within Emacs?

When building Emacs, I use ./configure --enable-checking='glyphs' so that I can take advantage of some of the built-in tools such as M-x trace-redisplay. The redisplay debugging messages can be seen ...
3
votes
0answers
861 views

Why doesn't auto-complete work in ruby-mode?

I have spent several days trying to debug auto-complete, it is working properly in Elisp mode, but when I go in Ruby mode it stops working. auto-complete-mode runs successfully, but the menu of ...
2
votes
0answers
42 views

Unexpected indentation in python chunks

Already one year ago, I described a problem on github with polymode and unexpected indents. Since there was no answer there so far and the problem is really annoying, I ask here for ideas for a ...
2
votes
1answer
147 views

How to use `next-error` and `previous-error` without the compilation buffer visible

I want to be able to use grep to find matching lines and to be able to jump through them using next-error and previous-error however I don't feel the need to have the match list on screen and it takes ...
2
votes
1answer
104 views

How can I debug a hang when debug-on-quit doesn't work?

I have a problem with haskell-mode where Emacs will hang every time I open up a Haskell file. Mashing Ctrl-g a few times will get the file opened. So I would imagine setting debug-on-quit would allow ...
2
votes
0answers
256 views

Valgrind interface for emacs

Is there an interface similar to 'gdb-mi' for using Valgrind in emacs? What are some ways to use Valgrind inside emacs?
2
votes
0answers
390 views

How to diagnose emacs hanging and 100% cpu on startup?

How can I diagnose this issue? I've tried using strace and I see the following that seems to be stuck in a loop: recvfrom(5, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., ...
2
votes
0answers
1k views

Extremely slow startup on Windows - How to debug?

I have a serious problem with an extremely slow spacemacs startup (emacs-init-time = ~200s). (The server works, but this is so slow I cannot debug some other problems that I am trying to fix) My ...
2
votes
0answers
796 views

debugging: how to optimize a RealGUD workflow

I code in Python and I my workflow uses debuggers (I coded for 8 years in Matlab). I develop numerical simulation codes: most of the time it returns a result, the question is: "Is the result right?" ...
2
votes
0answers
418 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: ...
2
votes
0answers
65 views

inhibit-read-only affects all buffers when *Backtrace* buffer is open

I use buffer-read-only as a safety measure for anything that is important. Recently, I have been debugging functions that use inhibit-read-only and I leave the *Backtrace* open to go about my ...
2
votes
0answers
70 views

how can I debug or fix slowness in org-cycle?

running org-cycle appears to hang sometimes. I've run M-x profiler-start <tab> ;; bound to org-cycle C-g ;; to cancel apparently-hung command M-x profiler-report and I see that a bunch of time ...
2
votes
0answers
564 views

init error: file missing - cl-generic after any time I edit settings.org file

I am using org mode to organize my various Emacs settings. Within my init.el file I just have (taking out initial comments): ;;; Code: (package-initialize) (eval-when-compile (require 'use-package))...
1
vote
0answers
27 views

Emacs freezes when pressing ESC

My Emacs usually works well, but sometimes it freezes, to be more specific: It only freezes after pressing ESC. When the freeze begins, it will always freeze after pressing ESC: I kill Emacs, restart ...
1
vote
0answers
35 views

Thumbnails not displaying with image-dired

Background: I recently found out about image-dired, so I'm playing around with it and trying to get it to work. It seems to mostly work, but when I image-dired into a directory (we'll call it ~/...
1
vote
0answers
35 views

How to debug org-caldav-sync?

I'm trying to sync Google Calendar over OAuth2 using org-caldav. However, when I execute M-x org-caldav-sync, the following error occurs: *Messages*: Contacting host: www.googleapis.com:443 json-...
1
vote
0answers
38 views

How do I debug a flask application from within emacs?

I want to use something like pdbpp or ipdb to debug a flask application. I've tried but not understood how to set a breakpoint in a python file that's part of a wider application and see it hit. There ...
1
vote
0answers
32 views

Python debug mode in Emacs

I'm looking for a python debug debug mode in Emacs that allows me to start flask apps in debug mode and interact with them. Is there something that does this and and a step through on how to use it? I'...
1
vote
0answers
41 views

Emacs freezes when using split-string in recursive function

I'm trying to figure out why my emacs keeps freezing when running this set of functions to split a string into a list of pairs. Is there some significant overhead happening when using string-split? Is ...
1
vote
0answers
86 views

Passing arguments to dap-mode (c++)

everyone. I am new to debugging with dap-mode and i can't figure out how to pass arguments. I tried by creating a template (dap-register-debug-template "GDB::Mine" (list :type "gdb" :...
1
vote
0answers
87 views

Matlab-shell autocompletion error

For some reason emacs matlab-shell is returning an error when running autocompletion. The debugging output for a completion of "load Da[TAB]" is shown below. The closest thread that I've ...
1
vote
1answer
706 views

Debugging with dap-mode for python and taking user input

I am trying to make dap-mode for python working on spacemacs. For the most part I was able to get it working, but I am having issues taking in input on the CLI def main(): a = input(">") The ...
1
vote
0answers
12 views

CIDER inspector unable to refresh a modified atom

With the CIDER inspector I'm able to view the contents of an atom. I can do C-u C-u C-c M-i and input the atom with an @ prefix and the value displays correctly. Now, if I keep the inspector window ...
1
vote
0answers
30 views

Conditional CIDER breakpoint not working in recursive functions

I'm using CIDER for Clojure programming. I've been playing around with the CIDER debugger lately. I wanted to use the conditional breakpoint facility with some simple recursive function, such as ...
1
vote
0answers
45 views

Debugger breaks with Args out of range: “”, 0

When forge is installed on a system with no compiler, I sometimes get this error which breaks magit. I'd like to figure out the traceback for this error so I can add some proper error handling, ...
1
vote
1answer
228 views

Non-hex digit used for Unicode escape error when setting org-latex-classes

When I try to set org-latex-classes with the following code: (setq org-latex-classes '(("article" " \\documentclass[12pt,a4paper]{article} \usepackage{xeCJK} %\usepackage[heading]{...
1
vote
0answers
553 views

Symbol's function defintion is void: org-show-all

I get the above error when trying to archive my org agenda using C-c C-x C-a and/or C-c C-x C-s, according to instructions over here. My archive location is set the default. UPDATE: After following @...
1
vote
0answers
92 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 ...
1
vote
0answers
69 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 ...
1
vote
0answers
193 views

neotree: `all-the-icons-icon-for-dir` raises void-function error

I am getting an error with neotree and i dont know why the arguments from call-interactively are nil. Edit: The Problem is within neotree and i have an empty init file just with neotree and the ...
1
vote
2answers
82 views

How to open 3 emacs windows when debugging using gdb

I am debugging a program that outputs 8 or more lines of display and requires input. So my IO window has to be say 10 rows or so in height. But I also want to see the source code AND of course the ...