.
Thread 3 (process 1534):
#0  0x00007fbce0ea65a9 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
No symbol table info available.
#1  0x00007fbce3966926 in WTF::TCMalloc_PageHeap::scavengerThread (
    this=0x7fbce475bb40) at ../JavaScriptCore/wtf/FastMalloc.cpp:2291
No locals.
#2  0x00007fbce3966949 in WTF::TCMalloc_PageHeap::runScavengerThread (
    context=0x7fbce4769c0c) at ../JavaScriptCore/wtf/FastMalloc.cpp:1429
No locals.
#3  0x00007fbce0ea1a04 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#4  0x00007fbce0c0b7bd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#5  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (process 1565):
#0  0x00007fbce0ea682d in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
No symbol table info available.
#1  0x00007fbce18b9602 in ?? () from /usr/lib/libgthread-2.0.so.0
No symbol table info available.
#2  0x00007fbce16070bf in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#3  0x00007fbce16071cf in g_async_queue_timed_pop ()
   from /lib/libglib-2.0.so.0
No symbol table info available.
#4  0x00007fbce16560a0 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#5  0x00007fbce1654b34 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#6  0x00007fbce0ea1a04 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#7  0x00007fbce0c0b7bd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#8  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (process 1530):
#0  0x00007fbce0b5f4b5 in *__GI_raise (sig=<value optimized out>)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
	pid = <value optimized out>
	selftid = <value optimized out>
#1  0x00007fbce0b62f50 in *__GI_abort () at abort.c:92
	act = {__sigaction_handler = {sa_handler = 0x7fbcce552df1, 
    sa_sigaction = 0x7fbcce552df1}, sa_mask = {__val = {140449201657928, 
      140736612597680, 1225, 140736612597920, 140449200806342, 206158430232, 
      140736612597936, 140736612597712, 140449200717224, 206158430256, 
      140736612597960, 48805008, 434544, 2323049405900550000, 
      3035536552852072488, 140736612629272}}, sa_flags = -523896589, 
  sa_restorer = 0x7fbcce552ce0}
	sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007fbce0b58481 in *__GI___assert_fail (
    assertion=0x7fbcce552df1 <Address 0x7fbcce552df1 out of bounds>, 
    file=<value optimized out>, line=1225, 
    function=0x7fbcce552f10 <Address 0x7fbcce552f10 out of bounds>)
    at assert.c:81
	buf = 0x2e8b490 "epiphany-browser: /build/buildd/nspluginwrapper-1.2.2/src/npw-rpc.c:1225: do_recv_NPObject: Assertion `npobj != ((void *)0)' failed.\n"
#3  0x00007fbcce5478a9 in ?? ()
No symbol table info available.
#4  0x00007fffcbcd0230 in ?? ()
No symbol table info available.
#5  0x00000001cbcd01e8 in ?? ()
No symbol table info available.
#6  0x00007fffcbcd2260 in ?? ()
No symbol table info available.
#7  0x00007fbcce54a7f1 in ?? ()
No symbol table info available.
#8  0x0000000000000001 in ?? ()
No symbol table info available.
#9  0x00007fbc0000000d in ?? ()
No symbol table info available.
#10 0x00007fffcbcd0260 in ?? ()
No symbol table info available.
#11 0x00007fffcbcd2380 in ?? ()
No symbol table info available.
#12 0x00007fffcbcd01e4 in ?? ()
No symbol table info available.
#13 0x00007fffcbcd01e0 in ?? ()
No symbol table info available.
#14 0x00007fffcbcd01dc in ?? ()
No symbol table info available.
#15 0x00007fffcbcd01c0 in ?? ()
No symbol table info available.
#16 0x00007fffcbcd01c8 in ?? ()
No symbol table info available.
#17 0x00007fffcbcd01d0 in ?? ()
No symbol table info available.
#18 0x00007fbcce5533dc in ?? ()
No symbol table info available.
#19 0x000000000000000e in ?? ()
No symbol table info available.
#20 0x0000000000000000 in ?? ()
No symbol table info available.