http://bugzilla.opensuse.org/show_bug.cgi?id=1175037 http://bugzilla.opensuse.org/show_bug.cgi?id=1175037#c8 --- Comment #8 from Dirk Weber <d_werner@gmx.net> --- Created attachment 843618 --> http://bugzilla.opensuse.org/attachment.cgi?id=843618&action=edit gdb debug sessions stepping through until the endless loop is entered with another message triggering the bug I tried to step until the location where it happens, see the log of the debug session. Using the current claws-mail version from Tumbleweed (snapshot 20201111) rpm -q claws-mail claws-mail-3.17.8-3.2.x86_64 Making a step at textview.c:1204 the endless loop is entered. Interrupting this with CTRL-C shows e.g. following locations: ^C Thread 1 "claws-mail" received signal SIGINT, Interrupt. 0x00007ffff6194188 in ?? () from /usr/lib64/libharfbuzz.so.0 ^C Thread 1 "claws-mail" received signal SIGINT, Interrupt. 0x00007ffff62edbbf in ?? () from /usr/lib64/libpangoft2-1.0.so.0 ^C Thread 1 "claws-mail" received signal SIGINT, Interrupt. 0x00007ffff6506c4d in _int_malloc () from /lib64/libc.so.6 1204: if (continue_write == FALSE) { messageview_show_partial_display( textview->messageview, textview->messageview->msginfo, mimeinfo->length); } GTK_EVENTS_FLUSH(); the last lines of stepping are reproducibly ... 1191 in textview.c (gdb) 1192 in textview.c (gdb) 1193 in textview.c (gdb) 1191 in textview.c (gdb) 1204 in textview.c (gdb) p continue_write $6 = 1 (gdb) step ^C Thread 1 "claws-mail" received signal SIGINT, Interrupt. 0x00007ffff6506c4d in _int_malloc () from /lib64/libc.so.6 (gdb) -- You are receiving this mail because: You are on the CC list for the bug.