Thread 2 (Thread 0xb6125b40 (LWP 2488)): #0 0xb7fdd424 in __kernel_vsyscall () #1 0xb781b96b in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0 #2 0xb7607c74 in mailsem_internal_wait () from /usr/lib/libetpan.so.15 #3 0xb7607e7d in mailsem_down () from /usr/lib/libetpan.so.15 #4 0x082545cb in thread_run (data=0x865d5a0) at etpan-thread-manager.c:324 #5 0xb7817d4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0 #6 0xb746a8be in clone () from /lib/i386-linux-gnu/libc.so.6 Thread 1 (Thread 0xb67ff8c0 (LWP 2485)): #0 0xb73f4ee6 in free () from /lib/i386-linux-gnu/libc.so.6 #1 0xb7714ccb in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0 #2 0xb7714f50 in g_free () from /lib/i386-linux-gnu/libglib-2.0.so.0 #3 0x082465d2 in slist_free_strings (list=0xb580e4c0) at utils.c:261 #4 0x0811e782 in imap_get_flags_thread (data=<optimized out>) at imap.c:4825 #5 imap_get_flags (folder=0x865ae48, item=0x865c928, msginfo_list=0x87386b0, msgflags=0x83ec6b8) at imap.c:4888 #6 0x08101cee in syncronize_flags (msglist=0x87386b0, item=0x865c928) at folder.c:1937 #7 syncronize_flags (item=0x865c928, msglist=0x87386b0) at folder.c:1923 #8 0x0810231e in folder_item_scan_full (item=0x865c928, filtering=1)
> Version: 3.8.0 Really? ;) So, first of all, I'm not a Claws Mail developer. But the backtrace is incomplete and lacking all the interesting details => Claws Mail has not been compiled with debug options or has been stripped. Else, see bug comment 1. You should not be using 3.8.0 anymore, especially not if you experience crashes related to IMAP access.
re-open if you can reproduce this bug with the latest release