.
Thread 1 (Thread 0x7f0d46848780 (LWP 29121)):
#0  0x00007f0d450c4f79 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        resultvar = 0
        pid = 29121
        selftid = 29121
#1  0x00007f0d450c8388 in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x7fff5a39cf94, sa_sigaction = 0x7fff5a39cf94}, sa_mask = {__val = {139694971074982, 139694990208344, 3105, 4294967295, 139694969714579, 4294967296, 140734707115328, 10103662288, 139694953665237, 139694993972824, 0, 0, 0, 21474836480, 139694993436672, 139694971090104}}, sa_flags = 1178909604, sa_restorer = 0x7f0d4644bd30}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f0d450bde36 in __assert_fail_base (fmt=0x7f0d4520f4b8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f0d4644bba4 "delb != ((void *)0)", file=file@entry=0x7f0d4644ad58 "/build/buildd/subversion-1.8.8/subversion/libsvn_client/merge.c", line=line@entry=3105, function=function@entry=0x7f0d4644bd30 "merge_dir_deleted") at assert.c:92
        str = 0x997f70 "0r\231"
        total = 4096
#3  0x00007f0d450bdee2 in __GI___assert_fail (assertion=0x7f0d4644bba4 "delb != ((void *)0)", file=0x7f0d4644ad58 "/build/buildd/subversion-1.8.8/subversion/libsvn_client/merge.c", line=3105, function=0x7f0d4644bd30 "merge_dir_deleted") at assert.c:101
No locals.
#4  0x00007f0d46435564 in ?? () from /usr/lib/x86_64-linux-gnu/libsvn_client-1.so.1
No symbol table info available.
#5  0x00007f0d46443326 in ?? () from /usr/lib/x86_64-linux-gnu/libsvn_client-1.so.1
No symbol table info available.
#6  0x00007f0d464433c4 in ?? () from /usr/lib/x86_64-linux-gnu/libsvn_client-1.so.1
No symbol table info available.
#7  0x00007f0d4482bf4f in ?? () from /usr/lib/x86_64-linux-gnu/libsvn_ra_serf-1.so.1
No symbol table info available.
#8  0x00007f0d4482f30e in ?? () from /usr/lib/x86_64-linux-gnu/libsvn_ra_serf-1.so.1
No symbol table info available.
#9  0x00007f0d443d866a in ?? () from /lib/x86_64-linux-gnu/libexpat.so.1
No symbol table info available.
#10 0x00007f0d443d964e in ?? () from /lib/x86_64-linux-gnu/libexpat.so.1
No symbol table info available.
#11 0x00007f0d443d79e1 in ?? () from /lib/x86_64-linux-gnu/libexpat.so.1
No symbol table info available.
#12 0x00007f0d443d816d in ?? () from /lib/x86_64-linux-gnu/libexpat.so.1
No symbol table info available.
#13 0x00007f0d443db5df in XML_ParseBuffer () from /lib/x86_64-linux-gnu/libexpat.so.1
No symbol table info available.
#14 0x00007f0d4482ffe0 in svn_ra_serf.handle_xml_parser () from /usr/lib/x86_64-linux-gnu/libsvn_ra_serf-1.so.1
No symbol table info available.
#15 0x00007f0d44830ce0 in ?? () from /usr/lib/x86_64-linux-gnu/libsvn_ra_serf-1.so.1
No symbol table info available.
#16 0x00007f0d4326ac90 in serf.process_connection () from /usr/lib/x86_64-linux-gnu/libserf-1.so.1
No symbol table info available.
#17 0x00007f0d432696e6 in serf_event_trigger () from /usr/lib/x86_64-linux-gnu/libserf-1.so.1
No symbol table info available.
#18 0x00007f0d432697cc in serf_context_run () from /usr/lib/x86_64-linux-gnu/libserf-1.so.1
No symbol table info available.
#19 0x00007f0d4482c5a9 in ?? () from /usr/lib/x86_64-linux-gnu/libsvn_ra_serf-1.so.1
No symbol table info available.
#20 0x00007f0d4642e2ea in ?? () from /usr/lib/x86_64-linux-gnu/libsvn_client-1.so.1
No symbol table info available.
#21 0x00007f0d464309a1 in ?? () from /usr/lib/x86_64-linux-gnu/libsvn_client-1.so.1
No symbol table info available.
#22 0x00007f0d46433e02 in ?? () from /usr/lib/x86_64-linux-gnu/libsvn_client-1.so.1
No symbol table info available.
#23 0x00007f0d46437dca in svn_client_merge_peg5 () from /usr/lib/x86_64-linux-gnu/libsvn_client-1.so.1
No symbol table info available.
#24 0x0000000000411ea9 in svn_cl.merge ()
No symbol table info available.
#25 0x000000000041b424 in ?? ()
No symbol table info available.
#26 0x0000000000406a77 in ?? ()
No symbol table info available.
#27 0x00007f0d450afec5 in __libc_start_main (main=0x406a30, argc=8, argv=0x7fff5a39b9a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff5a39b998) at libc-start.c:285
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -74907298577732415, 4221578, 140734707120544, 0, 0, 75246478482779329, 67389207417105601}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x41dcf0, 0x7fff5a39b9a8}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4316400}}}
        not_first_call = <optimized out>
#28 0x0000000000406ab3 in ?? ()
No symbol table info available.