Core dump on close

[balkin]

candybar always crashes for me (on close).
It looks like:

baron@brn /usr/local/portage/x11-libs (git)-[master] % candybar                                                                                                                         =98%
[22:44:32] INFO candybar beta-git-439.e60f2c0 (Nov 18 2014 05:22:06)
[22:44:32] INFO using config file '/home/baron/.config/candybar/config.json'
[22:44:32] INFO loading theme 'file:////usr/share/candybar/theme-default/index.html'
[22:44:32] WARNING loading of '//usr/lib/candybar/libwidget_now_playing_mpd' (now_playing_mpd) failed
^C[1]    3885 segmentation fault (core dumped)  candybar

I loaded core dump into gdb (sorry, only candybar binary is unstripped, please let me know if you need full backtrace from libpthread):

Core was generated by `candybar'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f6a595853af in pthread_cond_timedwait () from /lib64/libpthread.so.0
(gdb) bt full
#0  0x00007f6a595853af in pthread_cond_timedwait () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x000000000040488c in join_widget_threads (bar=0x695df0) at ../src/widgets.c:122
        ret = 22
        timeout = {tv_sec = 1416339876, tv_nsec = 206315119}
        __func__ = "join_widget_threads"
#2  0x0000000000404436 in signal_handler (signal=2) at ../src/candybar.c:166
No locals.
#3  <signal handler called>
No symbol table info available.
#4  0x00007f6a592b4b5d in poll () from /lib64/libc.so.6
No symbol table info available.
#5  0x00007f6a5c73ce44 in ?? () from /usr/lib64/libglib-2.0.so.0
No symbol table info available.
#6  0x00007f6a5c73d16a in g_main_loop_run () from /usr/lib64/libglib-2.0.so.0
No symbol table info available.
#7  0x00007f6a5d0cad65 in gtk_main () from /usr/lib64/libgtk-3.so.0
No symbol table info available.
#8  0x0000000000403dc1 in main (argc=1, argv=0x7ffff22569e8) at ../src/candybar.c:301
        config_filename = <optimized out>
        window = 0x67e260
        layout = 0x697270
        screen = <optimized out>
        monitors_num = <optimized out>
        dest = {x = 0, y = 0, width = 1920, height = 1080}
        sa = {__sigaction_handler = {sa_handler = 0x404400 <signal_handler>, sa_sigaction = 0x404400 <signal_handler>}, sa_mask = {__val = {0 <repeats 16 times>}}, sa_flags = 0, 
          sa_restorer = 0x0}
        __func__ = "main"
        theme_config = 0x747c80
(gdb) 

I already checked the issues and tried disabling battery in config.json, but it still crashes.

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