This is related to this Emacs.SE question.
I use the code from the answer:
(setq LaTeX-begin-regexp "\\(?:begin\\|if@\\)\\b")
(setq LaTeX-end-regexp "\\(?:end\\|else\\|fi\\)\\b")
I run into the error Match data clobbered by buffer modification hooks when editing tex files. The way to reproduce is as follows.
echo "\input ./...
This file when I compile it with AUCTeX, and then try to view it, using TeX-evince-sync-view, shows that one page has been compiled, but then shows a blank view. After I kill it, TeX-evince-sync-view ...
I'm a bit lost on what I can use the TeX input mode for. What I'd like to achieve is a mathematical notation like ∑ᵢ₌₁ᴺ ∑ⱼ₌₁ᴹ in pure UTF text and it seems to mostly work, i.e. \sum _ i _ = _ 1 works, ...