x0fea98e4 in strlen () from /lib/libc.so.6
(gdb) bt
#0  0x0fea98e4 in strlen () from /lib/libc.so.6
#1  0x0fe70a04 in vfprintf@@GLIBC_2.4 () from /lib/libc.so.6
#2  0x0fe71714 in buffered_vfprintf () from /lib/libc.so.6
#3  0x0fe6d200 in vfprintf@@GLIBC_2.4 () from /lib/libc.so.6
#4  0x0ff2b318 in __fprintf_chk@@GLIBC_2.4 () from /lib/libc.so.6
#5  0x0e789e88 in newmail_hook () from /usr/lib/claws-mail/plugins/newmail.so
#6  0x1019df64 in ?? ()
#7  0x0f77c62c in g_hook_list_marshal () from /lib/libglib-2.0.so.0
#8  0x1019e0c8 in hooks_invoke ()
#9  0x10098858 in ?? ()
#10 0x10098d68 in folder_item_move_msgs ()
#11 0x10157ca0 in procmsg_move_messages ()
#12 0x101776f8 in summary_execute ()
#13 0x10178858 in summary_move_selected_to ()
#14 0x01ba3a14 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#15 0x0f6de44c in g_cclosure_marshal_VOID__VOID () from /lib/libgobject-2.0.so.0
#16 0x0f6cd9fc in g_closure_invoke () from /lib/libgobject-2.0.so.0
#17 0x0f6e1ca4 in ?? () from /lib/libgobject-2.0.so.0
#18 0x0f6e2ffc in g_signal_emit_valist () from /lib/libgobject-2.0.so.0
#19 0x0f6e31d8 in g_signal_emit () from /lib/libgobject-2.0.so.0
#20 0x01dcf5cc in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#21 0x0f6cd9fc in g_closure_invoke () from /lib/libgobject-2.0.so.0
#22 0x0f6e1ca4 in ?? () from /lib/libgobject-2.0.so.0
#23 0x0f6e2d84 in g_signal_emit_valist () from /lib/libgobject-2.0.so.0
#24 0x0f6e31d8 in g_signal_emit () from /lib/libgobject-2.0.so.0
#25 0x01a2d048 in gtk_accel_group_activate () from /usr/lib/libgtk-x11-2.0.so.0
#26 0x01a2d1bc in gtk_accel_groups_activate () from /usr/lib/libgtk-x11-2.0.so.0
#27 0x01df4018 in gtk_window_activate_key () from /usr/lib/libgtk-x11-2.0.so.0
#28 0x01ded328 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#29 0x01bd2fe0 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#30 0x0f6cbdcc in ?? () from /lib/libgobject-2.0.so.0
#31 0x0f6cd9fc in g_closure_invoke () from /lib/libgobject-2.0.so.0
#32 0x0f6e1df0 in ?? () from /lib/libgobject-2.0.so.0
#33 0x0f6e2d84 in g_signal_emit_valist () from /lib/libgobject-2.0.so.0
#34 0x0f6e31d8 in g_signal_emit () from /lib/libgobject-2.0.so.0
#35 0x01dd1048 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#36 0x01dd09c0 in gtk_widget_event () from /usr/lib/libgtk-x11-2.0.so.0
#37 0x01bd0634 in gtk_propagate_event () from /usr/lib/libgtk-x11-2.0.so.0
#38 0x01bce490 in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
#39 0x00241de8 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#40 0x0f78a844 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#41 0x0f78eb3c in ?? () from /lib/libglib-2.0.so.0
#42 0x0f78efa4 in g_main_loop_run () from /lib/libglib-2.0.so.0
#43 0x01bcd794 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#44 0x100d3734 in main ()