bug#25282: emacs 25,1 crash w/bt

[Eli Zaretskii <eliz@gnu.org>]

> From: Hlöðver Sigurðsson
> 	<hlolli@gmail.com>
> Date: Tue, 27 Dec 2016 12:21:32 +0100
> 
> My emacs 25.1 is crashing these days every 3 hours, irrelevant if Im
> on my laptop or work computer, and if Im programming in C or
> Clojure. Im always using Fedora, and I install emacs either by
> compiling from sources or installed from dnf. Just a paste of my last
> gdb crash backtrace: https://www.refheap.com/124399
> 
> Crashes are on my computer more likely when saveing or simply using the cursor around a document. I have
> aggressive indent mode enabled, haven't ruled that out yet. Looks to me still that something is not right in
> intervals.c?
> 
> Thanks for all feedback, hope I don't have to downgrade my emacs.
> 
> Best,
> Hlödver
> 
> (the beginning of the trace)
> Thread 1 "emacs" received signal SIGSEGV, Segmentation fault.
> 0x00000000005a0937 in balance_an_interval (i=0x685d630) at intervals.c:443
> 443 + RIGHT_TOTAL_LENGTH (i->left) - LEFT_TOTAL_LENGTH (i->left);
> (gdb) bt
> #0 0x00000000005a0937 in balance_an_interval (i=0x685d630) at intervals.c:443
> #1 0x00000000005a0ba5 in balance_possible_root_interval (interval=<optimized out>) at intervals.c:482
> #2 0x00000000005a1749 in find_interval (tree=<optimized out>, position=0) at intervals.c:673
> #3 0x00000000005a4d8e in validate_interval_range (object=<optimized out>,
> begin=begin@entry=0x7fffffff0028, end=end@entry=0x7fffffff0028, force=force@entry=false) at textprop.c:192

Please try the latest pretest of Emacs 25.2, I think this is due to
known bugs that were already fixed since v25.1 was released.

Thanks.