[okular] [Bug 398334] Okular crashes while un/re highlighting PDF file

[T. Zack Crawford]

https://bugs.kde.org/show_bug.cgi?id=398334

--- Comment #2 from T. Zack Crawford <t.z.crawford at hotmail.com> ---
(In reply to T. Zack Crawford from comment #1)
> I reinstalled okular and glibc in debug mode such that I could get the full
> backtrace and now the bug is not reproducible...

The crash started happening again. Managed to extract a trace using the gnu
debugger per the instructions at
https://wiki.archlinux.org/index.php/Debug_-_Getting_Traces

Trace --------
Starting program: /usr/bin/okular --verbose
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffed767700 (LWP 8371)]
[Thread 0x7ffff034b800 (LWP 8367) exited]
[Inferior 1 (process 8367) exited with code 01]
Starting program: /usr/bin/okular --verbose
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffed767700 (LWP 8374)]
[Thread 0x7ffff034b800 (LWP 8372) exited]
[Inferior 1 (process 8372) exited with code 01]
Starting program: /usr/bin/okular 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffed767700 (LWP 8387)]
[New Thread 0x7fffe6aa1700 (LWP 8390)]
[New Thread 0x7fffdb198700 (LWP 8391)]
[New Thread 0x7fffda856700 (LWP 8392)]
[New Thread 0x7fffda055700 (LWP 8393)]
[New Thread 0x7fffd9854700 (LWP 8394)]
[New Thread 0x7fffd9053700 (LWP 8395)]
[New Thread 0x7fffd8852700 (LWP 8396)]
[New Thread 0x7fffc3fff700 (LWP 8397)]
[New Thread 0x7fffc2cda700 (LWP 8400)]
[Thread 0x7fffc2cda700 (LWP 8400) exited]
[New Thread 0x7fffc2cda700 (LWP 8412)]
[New Thread 0x7fffb7fff700 (LWP 8413)]
[Thread 0x7fffc2cda700 (LWP 8412) exited]
[Thread 0x7fffb7fff700 (LWP 8413) exited]
[New Thread 0x7fffb7fff700 (LWP 8414)]
[New Thread 0x7fffc2cda700 (LWP 8415)]
[Thread 0x7fffb7fff700 (LWP 8414) exited]
[New Thread 0x7fffb7fff700 (LWP 8416)]
[Thread 0x7fffc2cda700 (LWP 8415) exited]
[New Thread 0x7fffb7fff700 (LWP 8417)]
[Thread 0x7fffb7fff700 (LWP 8416) exited]
[Thread 0x7fffb7fff700 (LWP 8417) exited]
[New Thread 0x7fffb7fff700 (LWP 8418)]
[New Thread 0x7fffc2cda700 (LWP 8419)]
[Thread 0x7fffb7fff700 (LWP 8418) exited]
[New Thread 0x7fffb7fff700 (LWP 8420)]
[Thread 0x7fffc2cda700 (LWP 8419) exited]
[New Thread 0x7fffc2cda700 (LWP 8421)]
[Thread 0x7fffb7fff700 (LWP 8420) exited]
[New Thread 0x7fffb7fff700 (LWP 8422)]
[Thread 0x7fffc2cda700 (LWP 8421) exited]
[New Thread 0x7fffc2cda700 (LWP 8423)]
[New Thread 0x7fffb77fe700 (LWP 8424)]
[Thread 0x7fffb7fff700 (LWP 8422) exited]
[Thread 0x7fffc2cda700 (LWP 8423) exited]
[New Thread 0x7fffb77fe700 (LWP 8425)]
[Thread 0x7fffb77fe700 (LWP 8424) exited]
[New Thread 0x7fffc2cda700 (LWP 8426)]
[Thread 0x7fffb77fe700 (LWP 8425) exited]
[Thread 0x7fffc2cda700 (LWP 8426) exited]
[New Thread 0x7fffc2cda700 (LWP 8427)]
[Thread 0x7fffc2cda700 (LWP 8427) exited]
[New Thread 0x7fffc2cda700 (LWP 8428)]
[Thread 0x7fffc2cda700 (LWP 8428) exited]
[New Thread 0x7fffc2cda700 (LWP 8429)]
[Thread 0x7fffc2cda700 (LWP 8429) exited]
[New Thread 0x7fffc2cda700 (LWP 8430)]
[New Thread 0x7fffb77fe700 (LWP 8431)]
[Thread 0x7fffc2cda700 (LWP 8430) exited]
[Thread 0x7fffb77fe700 (LWP 8431) exited]
[New Thread 0x7fffb77fe700 (LWP 8432)]
[Thread 0x7fffb77fe700 (LWP 8432) exited]
[New Thread 0x7fffb77fe700 (LWP 8433)]
[New Thread 0x7fffc2cda700 (LWP 8434)]
[Thread 0x7fffb77fe700 (LWP 8433) exited]
[Thread 0x7fffc2cda700 (LWP 8434) exited]
[New Thread 0x7fffc2cda700 (LWP 8435)]
[New Thread 0x7fffb77fe700 (LWP 8436)]
[New Thread 0x7fffc2cda700 (LWP 8437)]
[Thread 0x7fffc2cda700 (LWP 8435) exited]
[Thread 0x7fffb77fe700 (LWP 8436) exited]
[New Thread 0x7fffb77fe700 (LWP 8438)]
[Thread 0x7fffc2cda700 (LWP 8437) exited]
[Thread 0x7fffb77fe700 (LWP 8438) exited]
[New Thread 0x7fffb77fe700 (LWP 8439)]
[Thread 0x7fffb77fe700 (LWP 8439) exited]
[New Thread 0x7fffb77fe700 (LWP 8440)]
[Thread 0x7fffb77fe700 (LWP 8440) exited]
[New Thread 0x7fffb77fe700 (LWP 8441)]
[New Thread 0x7fffb77fe700 (LWP 8442)]
[Thread 0x7fffb77fe700 (LWP 8441) exited]
[Thread 0x7fffb77fe700 (LWP 8442) exited]
[New Thread 0x7fffb77fe700 (LWP 8443)]
[New Thread 0x7fffb77fe700 (LWP 8444)]
[Thread 0x7fffb77fe700 (LWP 8443) exited]
[Thread 0x7fffb77fe700 (LWP 8444) exited]
[New Thread 0x7fffb77fe700 (LWP 8446)]
[Thread 0x7fffb77fe700 (LWP 8446) exited]
[New Thread 0x7fffb77fe700 (LWP 8447)]

Thread 1 "okular" received signal SIGSEGV, Segmentation fault.
0x00007fffec69df6b in Okular::ObjectRect::distanceSqr
(this=this at entry=0x555555c6a2a0, 
    x=x at entry=0.52796803652968038, y=y at entry=0.717892903787549,
xScale=xScale at entry=1752, 
    yScale=yScale at entry=2297) at
/usr/src/debug/okular-18.08.1/core/annotations.h:693
693     /usr/src/debug/okular-18.08.1/core/annotations.h: No such file or
directory.

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