bug#28176: 26.0.50; Emacs hangs on entering a specific article in gnus

[Sam Steingold]

> * Eli Zaretskii <ryvm@tah.bet> [2017-08-21 20:41:31 +0300]:
>
>> From: Sam Steingold <sds@gnu.org>
>> Cc: 28176@debbugs.gnu.org
>> Date: Mon, 21 Aug 2017 13:23:23 -0400
>> 
>> I have no idea how to reproduce this easily.
>> It might work like this:
>> start gnus
>> open newsgroup "nntp+news.gwene.org:gwene.com.stackexchange.history"
>> in *Summary* buffer, find article with subject
>> "Why, in ancient battles, did being encircled mean defeat?"
>> view it by hitting RET.
>
> Can you show a backtrace when it hangs like that?

Alas, no: I cannot break out of the hang.
As I wrote:

Emacs hangs with a yellow triangle in the middle of the frame
(indicating ding) but C-g and C-] do not interrupt.
CPU usage is at 90%.
The only way out is "force quit" in activity monitor.

I.e., the only way out is "kill -9".

Thanks.

-- 
Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.1504
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