Questions tagged [error-handling]
The error-handling tag has no usage guidance.
56
questions
0
votes
1answer
18 views
Emacs 24.3: warning “Unable to activate package”
Upon startup of my emacs 24.3, I'm getting the errors:
Warning (emacs): Unable to activate package `with-editor'.
Required package `emacs-24.4' is unavailable
I have a dim recollection that when I ...
1
vote
2answers
25 views
Can a mode setup function fail?
If I define a new mode using define-derived-mode or define-minor-mode, can the mode setup somehow signal failure so that the mode is not activated?
All of the following modes are activated despite ...
0
votes
1answer
17 views
How to handle multiple kinds of errors with condition-case?
With condition-case, is there a way to handle multiple kinds of errors?
Currently I have user-error and error both being handled.
Is there a way to de-duplicate these checks to handle any kind of ...
0
votes
1answer
23 views
Why does Emacs not enter the debugger when popping a cons twice?
I wrote some LISP code that was wrong because I was trying to pop a cons twice:
(let ((pair '("a" . "b")))
(let* ((a (pop pair))
(b (pop pair)))
b))
Evaluating this in the *scratch* ...
4
votes
2answers
102 views
How to report that an interactive command couldn't run?
When writing my own interactive function, whats the best way to report that nothing happened.
(if line-is-empty
(message "Found empty line, nothing to do!")
(do-stuff))
Or is it better to use ...
2
votes
0answers
274 views
Fontconfig Error in Snap version of Emacs
I installed Emacs 26.3 using Snap in my Debian Buster. After I launch it, it gives me the following errors:
Fontconfig warning: "/etc/fonts/fonts.conf", line 5: unknown element "its:rules"
Fontconfig ...
1
vote
1answer
37 views
How does emacs flash its icon on the windows taskbar?
Sometimes when I run a process if there is an error during the process the emacs icon on the windows taskbar lights up, so if I'm in an other app I can see something happened there.
I'd like to use ...
0
votes
0answers
17 views
AucTeX'sTeX-next-error not catching any errors in ConTeXt
AucTeX's TeX-next-error doesn't display any of the errors listed in the output buffer, only "No more errors".
MWE:
\starttext
\Hello
\stoptext
% Local Variables:
% ConTeXt-Mark-version: "IV"
% End:
...
0
votes
0answers
20 views
“<Hangul> is undefined” error on space key press
I'm running Emacs 26.1 without any "strange" configuration: a bare bone Ubuntu 19.04 emacs package with few packages installed from elpa or melpa. I have the following issue: when pressing space bar ...
2
votes
2answers
72 views
Couldn't make condition-case work
Hello fellow Emacs Lisp enthusiasts!
I've encountered problem that I am even embarrassed to describe. It is very clear how to use condition-case from all the docs and examples that I can find online, ...
1
vote
1answer
59 views
After setting bookmark: `Wrong type argument: listp, "~/.spacemacs`
So I did just M-x bookmark-save in my original .spacemacs file, which lead to the case that when I booted Spacemacs, I get the following error:
Upgrading bookmark format from 0 to 1...
mapcar: Wrong ...
0
votes
0answers
64 views
Why AUCTeX/pdflatex show me help in Japanese?
I had this error message displayed to me by AUCTeX (already corrected using \ddot{\boldsymbol x})
ERROR: Extra }, or forgotten $.
--- TeX said ---
<recently read> }
l.51 \[ \boldsymbol M\ddot\...
1
vote
1answer
55 views
Latex compilation message in the echo area dissapears too soon
The outcome (success/error) of a Latex compilation (TeX-command-run-all) is printed in the echo area. Once you press a key, however, the echo area is cleared and the message is gone. I usually look at ...
1
vote
1answer
68 views
Keep going mode for require-package
In my initialization file, I have got:
(require-package 'clips-mode)
The thing is that, lately, this package fails to be loaded sometimes (it's already downloaded but I guess it fails when it tries ...
0
votes
1answer
70 views
helm-mu on macOS throws Invalid read syntax: (")
Hej guys,
I get an error when searching through my mails with helm-mu.
Messages gives
Invalid face reference: helm-grep-finish [96 times]
error in process filter: helm-mu-candidate-parser: End of ...
3
votes
2answers
834 views
Orgmode table error - shrunk field?
I'm very new to Emacs and Org mode, so I'm basically fumbling around. I'm getting an alarm bell ding whenever I type in an table in an *.org file. A message says "invalid function: org-table-with-...
0
votes
1answer
42 views
Identify which mode is throwing an error
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 ...
0
votes
0answers
177 views
“No such file or directory, bind-key” after installing use-package [duplicate]
I'm using Emacs on Windows 10. I want to override key bindings, so after reading How to override major mode bindings, I installed use-package with the built-in package manager (via M-x package-install ...
0
votes
1answer
33 views
How Can I Prevent make-process from failing if the default-directory doesn't exist?
Usually, when you open a file, Emacs prompts you to run M-x make-directory RET RET if the directory doesn't exist.
However, after writing my own advice, I realized that opening files in directories ...
1
vote
1answer
109 views
How can I disable the “<C-lwindow> is undefined” error?
I use Windows 10's virtual desktop feature. The hotkey for switching between virtual desktops is Ctrl-Win-Left / Ctrl-Win-Right. When Emacs is focused and I want to switch dekstops, I get an error ...
1
vote
1answer
211 views
Running emacs client: how do you know if the init files had errors loading
I use emacs 25, in nw mode, with "alias emacs='emacsclient -nw'"
When I add something to my personal.el, I do
brew services restart emacs
My issue is, if I make a big blunder inside my personal.el ...
0
votes
0answers
290 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 ...
2
votes
1answer
36 views
Exiting from outer calling functions on error
Consider the following:
(defun my-divide-by-0()
(condition-case nil
(/ 1 0)
(error (progn (message "Could not evaluate: 1/0") nil))))
(defun my-test()
(interactive)
(my-divide-by-0)
...
0
votes
1answer
121 views
redirect stderr to a file in call-process-region
I have been reading the documentation for call-process-region here and I am trying to redirect stderr to a file. from the the documentation, this looks correct
(call-process-region beg end perltidy-...
1
vote
2answers
151 views
Is the unwind-protect's clean form always evaluated?
I have this loop:
(catch 'QUIT
(while
(search-forward-regexp "\\([^\n\\]\\(?:\\\\\\\\\\)*\\|^\\(?:\\\\\\\\\\)+\\)%.*\n"
nil t)
(save-excursion
(let ((b (make-...
3
votes
1answer
59 views
When I (byte-compile-file “my-package.el”), can I treat warnings as errors?
As part of CI testing, I'm byte-compiling package files to make sure there are no errors. I'd like to take this a step further and ensure there are no warnings, either (like 'function not known to be ...
0
votes
0answers
104 views
On Windows 8.1, in Emacs Ghostscript doesn't work, while on commandline it does
Edited question of August 2017:
After a long search I found the reason, why a wonderful software called pdfsizeopt (for my question from April 2017 see below) does not work, when called from Emacs, ...
2
votes
2answers
1k views
Symbol's function definition is void: insert-string
;; Specify the startup banner. Default value is `official', it displays
;; the official spacemacs logo. An integer value is the index of text
;; banner, `random' chooses a random text banner in `core/...
2
votes
1answer
373 views
What is the difference between the error handler in condition-case and the error function
I am wondering the semantic of the error function. For condition-case, the Elisp manual says:
The arguments after the protected form are handlers. Each handler
lists one or more condition names (...
12
votes
1answer
601 views
Get backtrace from error programmatically
If an error is signalled in Emacs Lisp code, and debug-on-error is t, I get a backtrace buffer that makes it easy to figure out where the error occurred. However, for errors that occur while ...
2
votes
1answer
83 views
Taking action depending on the presence of particular message in the echo area
I have my proper function to run latex, say my-tex.
Sometimes one should run latex two times to get references right. A message like below in the echo area appears to tell this. How to identify ...
2
votes
1answer
55 views
Standard way of reporting user errors to user?
I am writing an emacs package which provides some commands to the user. The user can run things like M-x foobar and M-x eggsspam. However, some of these commands can fail. As an example, without ...
2
votes
1answer
39 views
Which function should I advise to do something when a user-error is unhandled?
I need to advise emacs to do something when any error dings to the user. I can't find any documentation on which function I actually need to advise.
Which function do I need to advise to do ...
2
votes
1answer
34 views
Catch invalid calc expression
Inspired by this blog I wrote a function which replaces arithmetic expressions between two $ symbols with the mathematical result inline (and deletes the $ symbols). How can I modify this such that it ...
49
votes
2answers
9k views
What do I do when Emacs is frozen? [duplicate]
What should I do when Emacs stops responding?
My current "emacs-is-frozen" protocol looks like this:
Spam C-g (it sometimes works)
Wait for a while.
pkill -9 emacs
What alternate steps could I try ...
2
votes
1answer
167 views
Break on all errors in edebug
How can I make Emacs break on an error, even if the error is being handled somewhere?
In my current scenario, the setup of a major mode is modifying the buffer and I want to find out why (and then ...
asked Mar 29 '16 at 9:54
Gilles 'SO- stop being evil'
15.9k4 gold badges41 silver badges79 bronze badges
0
votes
2answers
223 views
autoload list of packages in Emacs 25.0.92
According to emacs.SE answer I am trying to make Emacs (version 25.0.92) autoload packages if they are not already installed on my computer. At my .emacs file now I have only:
(package-initialize)
(...
6
votes
1answer
192 views
How to abort saving in a before-save-hook function?
If, in a function run from before-save-hook, I want to abort the saving of a file, so that the file is not saved and the user is signaled, how can I do that? Is it possible (without rebinding C-xC-s ...
0
votes
1answer
629 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 ...
3
votes
3answers
566 views
Finding frames by name
I'm trying to write a little compilation monitor frame that gets compilation updates written to it without the overhead of seeing absolutely everything going on in the compile. I've been working with ...
4
votes
1answer
314 views
How to condition-case Lisp nesting exceeds `max-lisp-eval-depth'?
I'd like to catch too big recursive call nesting in elisp, like this:
(condition-case nil
(potentially-too-recursive-function)
(xxx (message "Gave up, using defaults")))
What is the symbol in ...
1
vote
0answers
845 views
Can't exit Emacs with error “End of file during parsing”
Every time I press c-x c-c to exit Emacs, it shows "End of file during parsing" in the minibuffer. I cursorily examined my .emacs and did not find any mismatching parenthesis. Any idea what's the ...
9
votes
2answers
306 views
Rethrowing an error in Emacs Lisp
I need to call a function and perform a cleanup only if the function fails, and then relaunch the error. Here is the pseudo-code:
(condition-case err
(call-function)
(error
(cleanup)
;; ...
3
votes
3answers
204 views
How to call another function, if one function gives an error message
Suppose I call a function which is named as foo.
Sometimes that function foo will give a message such as "Example of error message". If that is the case, then something else should be executed.
...
2
votes
1answer
52 views
Invoke function on message
The debug-on-message variable tells Emacs to start the debugger when a matching message is displayed. How can I get Emacs to invoke my own function when a matching message is displayed?
My motivation ...
5
votes
1answer
582 views
Capturing stderr of subprocesses
I'm trying to capture stderr separately from stdout for a (synchronous) process run from emacs. I've found one way of doing it based on some code copied from emacs' shell-command function (I don't ...
3
votes
1answer
81 views
Perform function until it returns user-error
I want to define a function org-move-subtree-top that calls org-move-subtree-up until it returns a user-error (in this case "Cannot move past superior level or buffer limit"). How can I do this in ...
15
votes
3answers
4k views
Show line number on error
Say that emacs throws some error that I don't understand. Or maybe the error says "Symbol's value as variable is void: modes", but there are many occurrences of the symbol modes in my code, so I need ...
3
votes
1answer
166 views
How do I catch signals?
After reading the documentation, here's what I've tried:
(condition-case err
(signal 'my-error 'my-data)
(my-error (message "data: %S" err)))
Evaluating this form still throws the signal, ...
4
votes
1answer
341 views
define-error for older Emacs?
I'm using define-error to throw custom errors.
But it looks like this function wasn't yet implemented in emacs-24.3, for instance.
It still seems to work for emacs-24.3 if I write this:
(when (...
