bug#47267: 28.0.50; Emacs hangs in font-lock-default-fontify-region

[Lars Ingebrigtsen]

Wasim Abbas <abbas.wasim@gmail.com> writes:

> For a very specific c++ header file (attached rorrhi_types_test.hpp)
> emacs is hanging in
> font-lock-default-fontify-region(xxx xxx nil) consistently. Just
> removing a few characters from the begining of the file or removing some
> doxygen comments solves the problem. I tried a few versions including
> current master etc. Emacs 27.1.91 doesn't have the issue.

Wasim Abbas <abbas.wasim@gmail.com> writes:

> Forgot to mention to reproduce it, you need to scroll up and down for this to 
> kick in. I have seen this happening with shortcuts too but usually scrolling 
> up and down quickly with mouse will trigger it.

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

I'm unable to reproduce this problem in Emacs 29.  Do you still see this
problem in recent Emacs versions?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no