Comment 4 for bug 1231995

FYI, here's the backtrace of ofono crashing:

#0 0x4063c464 in strlen () from /lib/arm-linux-gnueabihf/libc.so.6
#1 0x404c0840 in _dbus_string_init_const (str=str@entry=0xbe9ba930, value=0x1 <Address 0x1 out of bounds>) at ../../dbus/dbus-string.c:196
#2 0x404b4162 in _dbus_check_is_valid_utf8 (name=<optimized out>) at ../../dbus/dbus-marshal-validate.c:1255
#3 0x404b5adc in dbus_message_iter_append_basic (iter=iter@entry=0xbe9ba980, type=type@entry=115, value=value@entry=0xbe9baa2c) at ../../dbus/dbus-message.c:2598
#4 0x00072c6c in append_variant (iter=iter@entry=0xbe9ba9d8, type=type@entry=115, value=value@entry=0xbe9baa2c) at src/dbus.c:62
#5 0x00072f48 in ofono_dbus_signal_property_changed (conn=conn@entry=0x1ff93b0, path=<optimized out>, interface=interface@entry=0xbfbd4 "org.ofono.SimManager", name=name@entry=0xc5980 "PinRequired",
    type=type@entry=115, value=value@entry=0xbe9baa2c) at src/dbus.c:219
#6 0x000866a4 in sim_pin_query_cb (error=<optimized out>, pin_type=<optimized out>, data=0x2002fb8) at src/sim.c:2746
#7 0x0001f0b6 in ril_query_passwd_state (sim=<optimized out>, cb=0x86645 <sim_pin_query_cb>, data=0x2002fb8) at drivers/rilmodem/sim.c:606
#8 0x0001fb3e in sim_status_cb (message=<optimized out>, user_data=0x2002fb8) at drivers/rilmodem/sim.c:562
#9 0x0001aa04 in handle_response (message=0x20023e0, p=0x2000200) at gril/gril.c:366
#10 dispatch (message=0x20023e0, p=<optimized out>) at gril/gril.c:509
#11 new_bytes (rbuf=0x1ff8790, user_data=0x2000200) at gril/gril.c:607
#12 0x0001b4ae in received_data (channel=0x2000090, cond=G_IO_IN, data=0x2000270) at gril/grilio.c:124
#13 0x403e4b6a in g_main_context_dispatch () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
#14 0x403e4dca in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
#15 0x403e4dca in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0