Correction! This is using the emacs-25 branch build. But I have seen the
same on master branch build too.

On Tue, Sep 20, 2016 at 2:44 PM Kaushal Modi <kaushal.modi@gmail.com> wrote:

> Lately I have been seeing this odd block highlighting issue in the master
> build. Unfortunately I do not know how to recreate the issue, and the rough
> estimate from when this started happening is also bad (some time last
> month).
>
> The best way to explain this issue is this gif:
>
> http://i.imgur.com/yXLBoLO.gifv
>
> For some reason, the region between lines 24 and 42 gets highlighted (not
> selected) when the mouse cursor hovers on any text in that region. These
> two points are not fixed; this could happen at random in different files.
>
> I cannot make this go away by reverting the buffer or disabling *all* the
> minor modes or changing the major mode to fundamental mode.
>
> The only ways this gets 'fixed' is if I kill the buffer and re-open the
> file, or if the file is modified outside of emacs and I revert the buffer.
>
> But then this issue can repeat at any time in future.
>
> Questions:
>
> - Does this behavior look familiar to any recent commit to anyone?
> - Where can I start looking so that I can provide a useful bug report? As
> even disabling all minor modes and changing to fundamental mode retains
> this issue, I do not what else to look at.
>
> Here is my emacs build info:
>
> Emacs version: GNU Emacs 25.1.1 (x86_64-unknown-linux-gnu, GTK+ Version
> 2.24.23)
>  of 2016-09-18, built using commit
> 1229cc4ae640ea1fd9fafbb0bd64e72fc07994f8.
>
> ./configure options:
>   --with-modules --prefix=/home/kmodi/usr_local/apps/6/emacs/emacs-25
> 'CPPFLAGS=-fgnu89-inline -I/home/kmodi/usr_local/6/include
> -I/usr/include/freetype2 -I/usr/include' 'CFLAGS=-O2 -march=native'
> 'LDFLAGS=-L/home/kmodi/usr_local/6/lib -L/home/kmodi/usr_local/6/lib64'
> PKG_CONFIG_PATH=/home/kmodi/usr_local/6/lib/pkgconfig:/home/kmodi/usr_local/6/lib64/pkgconfig:/cad/adi/apps/gnu/linux/x86_64/6/lib/pkgconfig:/cad/adi/apps/gnu/linux/x86_64/6/lib64/pkgconfig:/usr/lib/pkgconfig:/usr/lib64/pkgconfig:/usr/share/pkgconfig:/lib/pkgconfig:/lib64/pkgconfig
>
> Features:
>   XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
> NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE LIBOTF XFT ZLIB
> TOOLKIT_SCROLL_BARS GTK2 X11 MODULES
>
>
> --
>
> Kaushal Modi
>
-- 

Kaushal Modi