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Thread 1 (Thread 0xb755b6c0 (LWP 160)):
#0  0xb77c5424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb75f7aff in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        resultvar = <optimized out>
        resultvar = <optimized out>
        pid = -1216905216
        selftid = 160
#2  0xb75fb083 in __GI_abort () at abort.c:90
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x8000000, sa_sigaction = 0x8000000}, sa_mask = {__val = {0, 1215, 67, 3078062080, 3076458197, 3076783781, 3077781041, 22, 4294967295, 0, 0, 135793152, 15, 15, 5, 4, 3076577489, 3078062080, 3077786341, 3078352363, 3219646728, 3078063168, 3078064512, 3077786341, 1, 3078062080, 3078355513, 3078062080, 3078064512, 0, 3, 4096}}, sa_flags = -1217702408, sa_restorer = 0xb7778000}
        sigs = {__val = {32, 0 <repeats 31 times>}}
#3  0xb75f0857 in __assert_fail_base (fmt=0xb7736654 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0xb77bedeb "backend != ((void *)0)", file=file@entry=0xb77bede0 "./plugin.c", line=line@entry=1304, function=function@entry=0xb77bfa39 "open_input_source") at assert.c:92
        str = 0x81ca518 "\360\233\034\bp\204w\267d: ./plugin.c:1304: open_input_source: Assertion `backend != ((void *)0)' failed.\n"
        total = 4096
#4  0xb75f0907 in __GI___assert_fail (assertion=0xb77bedeb "backend != ((void *)0)", file=0xb77bede0 "./plugin.c", line=1304, function=0xb77bfa39 "open_input_source") at assert.c:101
No locals.
#5  0xb77bbfa8 in ?? () from /lib/i386-linux-gnu/plymouth/renderers/drm.so
No symbol table info available.
#6  0xb77bc067 in ?? () from /lib/i386-linux-gnu/plymouth/renderers/drm.so
No symbol table info available.
#7  0xb7796541 in ply_event_loop_process_pending_events () from /lib/i386-linux-gnu/libply.so.2
No symbol table info available.
#8  0xb7796cf8 in ply_event_loop_run () from /lib/i386-linux-gnu/libply.so.2
No symbol table info available.
#9  0x0804ba6d in ?? ()
No symbol table info available.
#10 0xb75e2905 in __libc_start_main (main=0x804b0f0, argc=3, ubp_av=0xbfe7ee84, init=0x8054b70, fini=0x8054be0, rtld_fini=0xb77d55f0 <_dl_fini>, stack_end=0xbfe7ee7c) at libc-start.c:260
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1216905216, 0, 0, 0, -761955701, -1591796070}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x3, 0x804c89f}, data = {prev = 0x0, cleanup = 0x0, canceltype = 3}}}
        not_first_call = <optimized out>
#11 0x0804c8c0 in ?? ()
No symbol table info available.