Flash player crashes sporadically in Konqueror

I was browsing forum.419eater.com and scamwarners.com/forum together, which I do often. It crashes without warning when I'm just looking at a page or scrolling. It's crashed several times in two hours, which it did not do before today. The last time I updated packages was December 23. The crash handler could not get a backtrace, so I ran konqueror in gdb and got the following:

(gdb) run forum.419eater.com
Starting program: /usr/bin/konqueror forum.419eater.com
[Depuración de hilo usando libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Nuevo Thread 0x7fffe3fe8700 (LWP 25574)]
[Nuevo Thread 0x7fffe37e7700 (LWP 25575)]
[Nuevo Thread 0x7fffd0b29700 (LWP 25584)]
[Nuevo Thread 0x7fff90119700 (LWP 25585)]
[Nuevo Thread 0x7fff8e31b700 (LWP 25602)]
Vector smash protection is enabled.
konqueror(25541)/kio (KIOJob) KIO::TransferJob::slotData: mimeType() not emitted when sending first data!; job URL = KUrl("https://log.pinterest.com/?guid=R4a5r20GqaEo&tv=2016111001&type=pidget&sub=www&button_count=0&follow_count=0&pin_count=0&profile_count=0&board_count=0&lang=en&via=https%3A%2F%2Fforum.419eater.com%2Fforum%2Findex.php&callback=PIN_1482833855244.f.callback%5B0%5D") data size = 0
[Thread 0x7fffe37e7700 (LWP 25575) terminado]
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[Nuevo Thread 0x7fff53fff700 (LWP 25906)]
[Thread 0x7fffe37e7700 (LWP 25838) terminado]
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[Thread 0x7fff51ffb700 (LWP 25988) terminado]
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[Nuevo Thread 0x7fff517fa700 (LWP 26030)]
[Nuevo Thread 0x7fff51ffb700 (LWP 26031)]
[Thread 0x7fff50ff9700 (LWP 26029) terminado]
[Thread 0x7fff517fa700 (LWP 26030) terminado]
[Thread 0x7fff51ffb700 (LWP 26031) terminado]
[Nuevo Thread 0x7fff51ffb700 (LWP 26050)]
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[Thread 0x7fff51ffb700 (LWP 26050) terminado]
[Thread 0x7fff517fa700 (LWP 26051) terminado]
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[Nuevo Thread 0x7fff50ff9700 (LWP 26121)]
[Nuevo Thread 0x7fff517fa700 (LWP 26122)]
[Nuevo Thread 0x7fff51ffb700 (LWP 26123)]
[Thread 0x7fff50ff9700 (LWP 26121) terminado]
[Thread 0x7fff517fa700 (LWP 26122) terminado]
[Thread 0x7fff51ffb700 (LWP 26123) terminado]
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[Thread 0x7fff51ffb700 (LWP 26208) terminado]
[Thread 0x7fff517fa700 (LWP 26209) terminado]
[Thread 0x7fff50ff9700 (LWP 26216) terminado]
[Nuevo Thread 0x7fff50ff9700 (LWP 26243)]
[Nuevo Thread 0x7fff517fa700 (LWP 26244)]
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[Thread 0x7fff517fa700 (LWP 26244) terminado]
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[Thread 0x7fff51ffb700 (LWP 26311) terminado]
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[Nuevo Thread 0x7fff50ff9700 (LWP 26325)]
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[Nuevo Thread 0x7fff517fa700 (LWP 26470)]
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[Thread 0x7fff37fff700 (LWP 26480) terminado]
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[Nuevo Thread 0x7fff377fe700 (LWP 26567)]
[Nuevo Thread 0x7fff37fff700 (LWP 26568)]
[Nuevo Thread 0x7fff50ff9700 (LWP 26572)]
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[Nuevo Thread 0x7fff537fe700 (LWP 26576)]
[Nuevo Thread 0x7fff52ffd700 (LWP 26578)]
[Nuevo Thread 0x7fff51ffb700 (LWP 26582)]
[Nuevo Thread 0x7fff517fa700 (LWP 26584)]
konqueror(25541)/kio (KIOJob) KIO::TransferJob::slotData: mimeType() not emitted when sending first data!; job URL = KUrl("https://node-p1w-ohnath.sitescout.com/adx/win/aid:586240b86b857805019f0008;c:WGJAuAADv2EKaYSLAABFDoYdBTiAXvq8VPRONw;s:b5a09b4f1ddb8996;cid:435088;ts:1482834104328;d:1470701") data size = 0
[Nuevo Thread 0x7fff36ffd700 (LWP 26619)]
[Nuevo Thread 0x7fff367fc700 (LWP 26621)]
[Nuevo Thread 0x7fff35ffb700 (LWP 26622)]
[Nuevo Thread 0x7fff357fa700 (LWP 26623)]
[Nuevo Thread 0x7fff34ff9700 (LWP 26636)]
[Nuevo Thread 0x7fff2ffff700 (LWP 26637)]
[Thread 0x7fff34ff9700 (LWP 26636) terminado]
[Thread 0x7fff2ffff700 (LWP 26637) terminado]
[Nuevo Thread 0x7fff2ffff700 (LWP 26697)]
[Nuevo Thread 0x7fff34ff9700 (LWP 26705)]
[Thread 0x7fff2ffff700 (LWP 26697) terminado]
[Thread 0x7fff34ff9700 (LWP 26705) terminado]
[Nuevo Thread 0x7fff34ff9700 (LWP 26718)]
[Thread 0x7fff34ff9700 (LWP 26718) terminado]
[Thread 0x7fff357fa700 (LWP 26623) terminado]
[Thread 0x7fff367fc700 (LWP 26621) terminado]
[Thread 0x7fff36ffd700 (LWP 26619) terminado]
[Thread 0x7fff35ffb700 (LWP 26622) terminado]
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[Nuevo Thread 0x7fff517fa700 (LWP 26739)]
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[Nuevo Thread 0x7fff52ffd700 (LWP 26741)]
[Nuevo Thread 0x7fff537fe700 (LWP 26742)]
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[Nuevo Thread 0x7fff367fc700 (LWP 26746)]
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[Thread 0x7fff367fc700 (LWP 26746) terminado]
konqueror(25541)/kio (KIOJob) KIO::TransferJob::slotData: mimeType() not emitted when sending first data!; job URL = KUrl("https://log.pinterest.com/?guid=RCYkNNQWPdnu&tv=2016111001&type=pidget&sub=www&button_count=0&follow_count=0&pin_count=0&profile_count=0&board_count=0&lang=en&via=https%3A%2F%2Fforum.419eater.com%2Fforum%2Fviewforum.php%3Ff%3D18&callback=PIN_1482834196564.f.callback%5B0%5D") data size = 0
[Nuevo Thread 0x7fff367fc700 (LWP 27572)]
[Nuevo Thread 0x7fff36ffd700 (LWP 27573)]
[Nuevo Thread 0x7fff377fe700 (LWP 27574)]
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[Nuevo Thread 0x7fff34ff9700 (LWP 27586)]
[Thread 0x7fff34ff9700 (LWP 27586) terminado]
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[Nuevo Thread 0x7fff2e7fc700 (LWP 28013)]
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[Nuevo Thread 0x7fff2e7fc700 (LWP 28033)]
konqueror(25541)/kio (KIOJob) KIO::TransferJob::slotData: mimeType() not emitted when sending first data!; job URL = KUrl("https://log.pinterest.com/?guid=rfdxQAAHjv4G&tv=2016111001&type=pidget&sub=www&button_count=0&follow_count=0&pin_count=0&profile_count=0&board_count=0&lang=en&via=https%3A%2F%2Fforum.419eater.com%2Fforum%2Fsearch.php&callback=PIN_1482834548717.f.callback%5B0%5D") data size = 0
[Nuevo Thread 0x7fff2effd700 (LWP 28038)]
[Thread 0x7fff2e7fc700 (LWP 28033) terminado]
[Thread 0x7fff2effd700 (LWP 28038) terminado]
[Nuevo Thread 0x7fff2effd700 (LWP 28117)]
[Thread 0x7fff2effd700 (LWP 28117) terminado]
konqueror(25541)/kio (KIOJob) KIO::TransferJob::slotData: mimeType() not emitted when sending first data!; job URL = KUrl("https://log.pinterest.com/?guid=WTqF6QdPvejU&tv=2016111001&type=pidget&sub=www&button_count=0&follow_count=0&pin_count=0&profile_count=0&board_count=0&lang=en&via=https%3A%2F%2Fforum.419eater.com%2Fforum%2Fsearch.php%3Fmode%3Dresults&callback=PIN_1482834555579.f.callback%5B0%5D") data size = 0
[Nuevo Thread 0x7fff2effd700 (LWP 28144)]
[Nuevo Thread 0x7fff2e7fc700 (LWP 28146)]
[Thread 0x7fff2effd700 (LWP 28144) terminado]
[Nuevo Thread 0x7fff2effd700 (LWP 28157)]
[Thread 0x7fff2e7fc700 (LWP 28146) terminado]
[Thread 0x7fff2effd700 (LWP 28157) terminado]
konqueror(25541)/kio (KIOJob) KIO::TransferJob::slotData: mimeType() not emitted when sending first data!; job URL = KUrl("https://log.pinterest.com/?guid=GjvY9v5nA5Ma&tv=2016111001&type=pidget&sub=www&button_count=0&follow_count=0&pin_count=0&profile_count=0&board_count=0&lang=en&via=https%3A%2F%2Fforum.419eater.com%2Fforum%2Fviewtopic.php%3Ft%3D280185%26highlight%3Dlambert%2Bhuddles&callback=PIN_1482834563946.f.callback%5B0%5D") data size = 0
[Nuevo Thread 0x7fff2effd700 (LWP 28174)]
[Nuevo Thread 0x7fff2e7fc700 (LWP 28175)]
[Thread 0x7fff2effd700 (LWP 28174) terminado]
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[Nuevo Thread 0x7fff2effd700 (LWP 28302)]
[Thread 0x7fff2effd700 (LWP 28302) terminado]
[Nuevo Thread 0x7fff2effd700 (LWP 28304)]
[Thread 0x7fff2effd700 (LWP 28304) terminado]
[Nuevo Thread 0x7fff2effd700 (LWP 28316)]
[Thread 0x7fff2effd700 (LWP 28316) terminado]
[Nuevo Thread 0x7fff2effd700 (LWP 28323)]
[Thread 0x7fff2effd700 (LWP 28323) terminado]
[Nuevo Thread 0x7fff2effd700 (LWP 28329)]
[Nuevo Thread 0x7fff2e7fc700 (LWP 28337)]
[Thread 0x7fff2effd700 (LWP 28329) terminado]
[Thread 0x7fff2e7fc700 (LWP 28337) terminado]
[Nuevo Thread 0x7fff2e7fc700 (LWP 28346)]
[Thread 0x7fff2e7fc700 (LWP 28346) terminado]
[Nuevo Thread 0x7fff2e7fc700 (LWP 28349)]
[Thread 0x7fff2e7fc700 (LWP 28349) terminado]
[Nuevo Thread 0x7fff2e7fc700 (LWP 28355)]
[Thread 0x7fff2e7fc700 (LWP 28355) terminado]
[Nuevo Thread 0x7fff2e7fc700 (LWP 28362)]
[Thread 0x7fff2e7fc700 (LWP 28362) terminado]
[Nuevo Thread 0x7fff2e7fc700 (LWP 28369)]
[Thread 0x7fff2e7fc700 (LWP 28369) terminado]
[Nuevo Thread 0x7fff2e7fc700 (LWP 28381)]
[Thread 0x7fff2e7fc700 (LWP 28381) terminado]
[Nuevo Thread 0x7fff2e7fc700 (LWP 28383)]
[Nuevo Thread 0x7fff2effd700 (LWP 28390)]
[Thread 0x7fff2e7fc700 (LWP 28383) terminado]
[Thread 0x7fff2effd700 (LWP 28390) terminado]

Thread 1 "konqueror" received signal SIGSEGV, Segmentation fault.
0x00007fff87231fd9 in ?? ()
   from /usr/lib/flashplugin-installer/libflashplayer.so
(gdb) where
#0 0x00007fff87231fd9 in ?? ()
   from /usr/lib/flashplugin-installer/libflashplayer.so
#1 0x00007ffff0ac9ac3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007ffff0ac905a in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007ffff0ac9400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007ffff0ac94ac in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5 0x00007ffff438c2ae in QEventDispatcherGlib::processEvents (this=0x623b90,
    flags=...) at kernel/qeventdispatcher_glib.cpp:450
#6 0x00007ffff4e19616 in QGuiEventDispatcherGlib::processEvents (
    this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#7 0x00007ffff435a18f in QEventLoop::processEvents (
    this=this@entry=0x7fffffffdad0, flags=...) at kernel/qeventloop.cpp:149
#8 0x00007ffff435a4f5 in QEventLoop::exec (this=this@entry=0x7fffffffdad0,
    flags=...) at kernel/qeventloop.cpp:204
#9 0x00007ffff43604b9 in QCoreApplication::exec ()
    at kernel/qcoreapplication.cpp:1227
#10 0x00007ffff4d6a22c in QApplication::exec () at kernel/qapplication.cpp:3828
#11 0x00007ffff7ba350f in kdemain (argc=<optimized out>, argv=<optimized out>)
    at /build/kde-baseapps-OyudFt/kde-baseapps-15.12.3/konqueror/src/konqmain.cpp:227
#12 0x00007ffff7737830 in __libc_start_main (
    main=0x4006d0 <main(int, char**)>, argc=2, argv=0x7fffffffde38,
    init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>,
    stack_end=0x7fffffffde28) at ../csu/libc-start.c:291
#13 0x0000000000400709 in _start ()

I filed this report on December 27 under konqueror and was told to report it under libflashplayer.

Ubuntu 16.04.1 LTS
flashplugin-installer 24.0.0.186ubuntu0.16.04.1
Konqueror 4.14.16
Linux caracal 4.4.0-53-generic #74-Ubuntu SMP Fri Dec 2 15:59:10 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux