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Invalid function in font-lock-fontify-keywords-region [duplicate]

Why do I get the error: font-lock-fontify-keywords-region: Invalid function: (concat "\\\\" (regexp-opt (quote ("cs" "hepth" "hepph" "heplat" "...
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0answers
20 views

Odd graphics issue on Kubuntu

Since moving to Kubuntu 20.04 I have been getting this strange visual tearing in emacs (running in its own window). I find that as I move the point along the line with the tearing, it is corrected. ...
1
vote
1answer
144 views

nov-mode returns binary buffer and “File mode specification error: (error Invalid version syntax: ‘’ (must start with a number))”

When opening an epub file with Nov-mode I get a binary buffer in fundamental mode and an error message File mode specification error: (error Invalid version syntax: ‘’ (must start with a number)). ...
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0answers
18 views

Flycheck gutter reporting of LaTeX compiler errors

I'm wondering if it's possible to have Flycheck report LaTeX compile errors the way it reports linting errors. For example, if I have: \documentclass[12pt]{article} \begin{documen} %ERROR Hello world! ...
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0answers
27 views

Error and warning highlighting

I use Emacs to write LISP and Python code. I have tried NetBeans and Eclipse before, which had the advantage of parsing the buffer and highlighting problems, e.g. if one function or symbol is not ...
0
votes
1answer
79 views

Error running timer (wrong-number-of-arguments equals 3)

I am trying to automatically change my Emacs theme according to time set (Thanks to answer provided by Dan). My code looks like this: (setq emacs-curr-theme nil) (setq emacs-light-theme 'faff) (setq ...