#0  0xb7f1bd2b in IA__g_logv (log_domain=<value optimized out>, log_level=G_LOG_LEVEL_ERROR, format=0xb7f64990 "file %s: line %d (%s): assertion failed: (%s)", 
#1  0xb7f1bfa9 in IA__g_log (log_domain=0x0, log_level=G_LOG_LEVEL_ERROR, format=0xb7f64990 "file %s: line %d (%s): assertion failed: (%s)")
#2  0xb7f1c026 in IA__g_assert_warning (log_domain=0x0, file=0x804a5de "tracker-thumbnailer.c", line=204, pretty_function=0x804a95c "main", 
#3  0x08049b9c in ?? ()
#4  0x00000000 in ?? ()