#0  0x00007f090c786174 in __lll_lock_wait () from /lib/libpthread.so.0
#1  0x00007f090c781b08 in _L_lock_104 () from /lib/libpthread.so.0
#2  0x00007f090c781470 in pthread_mutex_lock () from /lib/libpthread.so.0
#3  0x00007f090f94f726 in LockSemaphoreInfo () from /usr/lib/libMagickCore.so.3
#4  0x00007f090f8f8c4b in GetLocaleInfo_ () from /usr/lib/libMagickCore.so.3
#5  0x00007f090f8f8f6c in GetLocaleMessage () from /usr/lib/libMagickCore.so.3
#6  0x00007f090f8ce4d1 in GetLocaleExceptionMessage () from /usr/lib/libMagickCore.so.3
#7  0x00007f090f8cee33 in ThrowMagickExceptionList () from /usr/lib/libMagickCore.so.3
#8  0x00007f090f8cf0ca in ThrowMagickException () from /usr/lib/libMagickCore.so.3
#9  0x00007f090f963823 in AcquireStringInfo () from /usr/lib/libMagickCore.so.3
#10 0x00007f090f963ad4 in ConfigureFileToStringInfo () from /usr/lib/libMagickCore.so.3
#11 0x00007f090f8f80aa in GetLocaleOptions () from /usr/lib/libMagickCore.so.3
#12 0x00007f090f8f8d2d in GetLocaleInfo_ () from /usr/lib/libMagickCore.so.3
#13 0x00007f090f8f8f6c in GetLocaleMessage () from /usr/lib/libMagickCore.so.3
#14 0x00007f090f8ce4d1 in GetLocaleExceptionMessage () from /usr/lib/libMagickCore.so.3
#15 0x00007f090f8cee33 in ThrowMagickExceptionList () from /usr/lib/libMagickCore.so.3
#16 0x00007f090f8cf0ca in ThrowMagickException () from /usr/lib/libMagickCore.so.3
#17 0x00007f090f8ed9a6 in CloneImage () from /usr/lib/libMagickCore.so.3
#18 0x00007f090f8f5bb7 in CoalesceImages () from /usr/lib/libMagickCore.so.3
#19 0x00007f090f597898 in MogrifyImageList () from /usr/lib/libMagickWand.so.3
#20 0x00007f090f59f837 in MogrifyImages () from /usr/lib/libMagickWand.so.3
#21 0x00007f090f523280 in ConvertImageCommand () from /usr/lib/libMagickWand.so.3
#22 0x00007f090f59462c in MagickCommandGenesis () from /usr/lib/libMagickWand.so.3
#23 0x0000000000400955 in ?? ()
#24 0x00007f090ed0d1c4 in __libc_start_main () from /lib/libc.so.6