Continuing.

Program received signal SIGABRT, Aborted.
0x00007f0a6ad85f45 in *__GI_raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
64	../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
	in ../nptl/sysdeps/unix/sysv/linux/raise.c
#0  0x00007f0a6ad85f45 in *__GI_raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        pid = <value optimized out>
        selftid = <value optimized out>
#1  0x00007f0a6ad88d80 in *__GI_abort () at abort.c:88
        act = {__sigaction_handler = {sa_handler = 0x7fff9b5aa6e0, sa_sigaction = 0x7fff9b5aa6e0}, sa_mask = {__val = {139682731539097, 139682731535023, 140735799797504, 139682731722280, 14692690896, 
              140735799797712, 139682731535664, 139682718788272, 139682739197120, 206158430224, 4294967295, 140735799797536, 139682731257856, 4217520, 140735799799344, 0}}, sa_flags = 0, sa_restorer = 0x28d858}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f0a6b982787 in default_fatal_finish (type=LOG_TYPE_PANIC, status=0) at failures.c:164
        backtrace = 0x13da458 "/usr/local/dovecot20/lib/dovecot/libdovecot.so.0 [0x7f0a6b982760] -> /usr/local/dovecot20/lib/dovecot/libdovecot.so.0 [0x7f0a6b983a71] -> /usr/local/dovecot20/lib/dovecot/libdovecot.so.0(i_fatal+0) [0"...
#3  0x00007f0a6b983a71 in i_internal_fatal_handler (type=LOG_TYPE_PANIC, status=0, fmt=0x7f0a6b9aaca8 "file %s: line %d (%s): assertion failed: (%s)", args=0x7fff9b5aa850) at failures.c:592
No locals.
#4  0x00007f0a6b982aaf in i_panic (format=0x7f0a6b9aaca8 "file %s: line %d (%s): assertion failed: (%s)") at failures.c:230
        args = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7fff9b5aa940, reg_save_area = 0x7fff9b5aa870}}
#5  0x00007f0a6b959a30 in settings_link_get_new (new_ctx=0x14c9048, links=0x13fe9b0, old_link=0x141d170) at settings-parser.c:1501
        new_link = 0x14c9170
        old_sets = 0x7fff9b5aa9b8
        new_sets = 0x13e78c0
        i = 0
        count = 32522
        count2 = 1805158536
        diff = 128
        __FUNCTION__ = "settings_link_get_new"
#6  0x00007f0a6b959fca in settings_parser_dup (old_ctx=0x141d048, new_pool=0x14c2020) at settings-parser.c:1573
        new_ctx = 0x14c9048
        iter = 0x13e78c0
        new_link = 0x7f0a6b9a67b4
        links = 0x13fe9b0
        key = 0x141d1a8
        value = 0x141d170
        i = 4
        parser_pool = 0x14c9020
        __FUNCTION__ = "settings_parser_dup"
#7  0x00007f0a6bc0abd0 in mail_storage_service_lookup (ctx=0x1401048, input=0x7fff9b5aab00, user_r=0x7fff9b5aab60, error_r=0x7fff9b5aaae8) at mail-storage-service.c:791
        user = 0x14c2df0
        username = 0x14835c8 "xxxx"
        user_info = 0x14c2108
        user_set = 0x14071b0
        userdb_fields = 0x14835a0
        reply = {uid = 31, gid = 0, home = 0x13da228 "xxxx@el-presidente.edelhost.de", chroot = 0x7fff9b5aaac0 "\240\253Z\233\377\177", extra_fields = {arr = {buffer = 0x405ab0, element_size = 140735799799344}, 
            v = 0x405ab0, v_modifiable = 0x405ab0}}
        set_parser = 0x141d048
        user_pool = 0x14c2020
        temp_pool = 0x1483570
        ret = 1
#8  0x0000000000407e33 in cmd_rcpt (client=0x14b5048, args=0x14be04a "TO:<xxxx@el-presidente.edelhost.de>") at commands.c:383
        rcpt = {address = 0x0, detail = 0x0, service_user = 0x0}
        input = {module = 0x40dc6e "lmtp", service = 0x40dc6e "lmtp", username = 0x13da228 "xxxx@el-presidente.edelhost.de", local_ip = {family = 10, u = {ip6 = {__in6_u = {
                  __u6_addr8 = '\000' <repeats 15 times>, "\001", __u6_addr16 = {0, 0, 0, 0, 0, 0, 0, 256}, __u6_addr32 = {0, 0, 0, 16777216}}}, ip4 = {s_addr = 0}}}, remote_ip = {family = 10, u = {ip6 = {
                __in6_u = {__u6_addr8 = '\000' <repeats 15 times>, "\001", __u6_addr16 = {0, 0, 0, 0, 0, 0, 0, 256}, __u6_addr32 = {0, 0, 0, 16777216}}}, ip4 = {s_addr = 0}}}, userdb_fields = 0x0}
        address = 0x13da228 "xxxx@el-presidente.edelhost.de"
        username = 0x13da228 "xxxx@el-presidente.edelhost.de"
        detail = 0x40dbdf ""
        error = 0x0
        arg = 0x13da100 "TO:<xxxx@el-presidente.edelhost.de>"
        argv = 0x13da130
        len = 35
        ret = 0
#9  0x0000000000405ea5 in client_input_line (client=0x14b5048, line=0x14be045 "RCPT TO:<xxxx@el-presidente.edelhost.de>") at client.c:57
        cmd = 0x13da0f8 "RCPT"
        args = 0x14be04a "TO:<xxxx@el-presidente.edelhost.de>"
#10 0x0000000000406080 in client_input_handle (client=0x14b5048) at client.c:108
        _data_stack_cur_id = 3
        output = 0x1404558
        line = 0x14be045 "RCPT TO:<xxxx@el-presidente.edelhost.de>"
        ret = 0
#11 0x00000000004060f5 in client_input (client=0x14b5048) at client.c:121
No locals.
#12 0x00007f0a6b9935ba in io_loop_handler_run (ioloop=0x13e6f60) at ioloop-epoll.c:208
        ctx = 0x13fafc0
        events = 0x13fb800
        event = 0x13fb800
        list = 0x13e7f20
        io = 0x14a7380
        tv = {tv_sec = 59, tv_usec = 999399}
        events_count = 6
        t_id = 2
        msecs = 60000
        ret = 1
        i = 0
        j = 0
        call = true
#13 0x00007f0a6b992265 in io_loop_run (ioloop=0x13e6f60) at ioloop.c:350
No locals.
#14 0x00007f0a6b97b34a in master_service_run (service=0x13e5f00, callback=0x405b94 <client_connected>) at master-service.c:486
No locals.
#15 0x0000000000405d40 in main (argc=2, argv=0x1399040) at main.c:96
        set_roots = {0x40e900, 0x40e440, 0x0}
        service_flags = MASTER_SERVICE_FLAG_KEEP_CONFIG_OPEN
        storage_service_flags = 739
        c = -1
LND: Sending signal 6 to Thread 0x7f0a6c0cb6f0 (LWP 5671)
Detaching from program: /usr/local/dovecot20/libexec/dovecot/lmtp, process 5671