[Users] [Bug 3543] previous html render is shown (momentarily) on opening next html part

[noreply at thewildbeast.co.uk]

http://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=3543

--- Comment #10 from Robert <thewildbeast at osndok.com> ---

I just recently updated from Fedora 25 (which did not have this problem) to
Fedora 26 (which does).

* claws-mail-3.14.1-1.fc25.x86_64 - is not effected
* claws-mail-3.14.1-4.fc26.x86_64 - is effected

...this leads me to believe that the bug (or at least, the origin of this
issue) rests in a package other than claws-mail or claws-mail-plugins.

Observations:
* Sometimes the html is never rendered (simply shows white/blank).
* When checked, I find that the html in the mimetmp directory is correct (for
this email), just not displayed/updated in the panel.
* It *feels* like a missed timer or callback.

I found this reference too:
*
https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1436975.html
** Version: 3.13.2

I recommend:
* bumping the effected version to 3.14.1
* adding more debug log statements after 'fancy_viewer.c:436:Starting request
of...' (or at the very start of all the receiving callbacks)

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