Segmentation fault on debian wheezy and mydumper 0.9

[Matic Makovec]

I created a dump using mydumper.
When I try to import the data to another database using myloader I get segmentation fault.

Gdb tells me the following:

(gdb) thread apply all bt

Thread 2 (Thread 0x7f486bc8b700 (LWP 31616)):
#0 0x00007f486db4653c in recv () from /lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00007f486ddb833b in vio_read () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#2 0x00007f486ddb83b2 in vio_read_buff () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#3 0x00007f486dd9b3c6 in ?? () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#4 0x00007f486dd9b64f in ?? () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#5 0x00007f486dd9beb9 in my_net_read () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#6 0x00007f486dd9253a in cli_safe_read () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#7 0x00007f486dd93925 in ?? () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#8 0x00007f486dd952f6 in mysql_real_query () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#9 0x0000000000402e0b in restore_data (conn=conn@entry=0x19fe000, database=0x1a0ff00 "mab", table=0x1a10a00 "placements", filename=0x19fc740 "mab.placements.sql.gz",
    is_schema=is_schema@entry=0, need_use=need_use@entry=1) at /home/maticm/mydumper/myloader.c:485
#10 0x00000000004031b1 in process_queue (td=0x19fc820) at /home/maticm/mydumper/myloader.c:429
#11 0x00007f486d007f45 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f486db3eb50 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f486c8ac95d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#14 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f486e516720 (LWP 31615)):
#0 0x00007f486c809042 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x0000000000402a1b in add_table (filename=<optimized out>, conf=0x7fff5d700260) at /home/maticm/mydumper/myloader.c:388
#2 0x000000000040380b in restore_databases (conf=conf@entry=0x7fff5d700260, conn=conn@entry=0x19e0030) at /home/maticm/mydumper/myloader.c:217
#3 0x00000000004025f9 in main (argc=1, argv=0x7fff5d700398) at /home/maticm/mydumper/myloader.c:162

I am using version 0.9 from checked out from launchpad. If you sense there's a line mismatch it's because I've added a couple of g_message()'s into the code since I'm debugging this and I forgot to locate and remove them. The function calls are there though..

[Matic Makovec (matic-makovec-b)]

It is the same thing with unmodified (no g_message) 0.6 release:

gdb) thread apply all bt

Thread 2 (Thread 0x7ff03f9ca700 (LWP 460)):
#0 0x00007ff04188553c in recv () from /lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00007ff041af733b in vio_read () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#2 0x00007ff041af73b2 in vio_read_buff () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#3 0x00007ff041ada3c6 in ?? () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#4 0x00007ff041ada64f in ?? () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#5 0x00007ff041adaeb9 in my_net_read () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#6 0x00007ff041ad153a in cli_safe_read () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#7 0x00007ff041ad2925 in ?? () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#8 0x00007ff041ad42f6 in mysql_real_query () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
#9 0x000000000040299b in restore_data (conn=conn@entry=0x234a000, database=0x235b2b0 "mab", table=0x235b310 "placements", filename=0x235b290 "mab.placements.sql.gz",
    is_schema=is_schema@entry=0) at /home/maticm/mydumper/0.6/myloader.c:348
#10 0x0000000000402e35 in process_queue (td=0x2348850) at /home/maticm/mydumper/0.6/myloader.c:297
#11 0x00007ff040d46f45 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007ff04187db50 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007ff0405eb95d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#14 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ff042255720 (LWP 459)):
#0 0x00007ff040548042 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x000000000040321b in add_table (conf=0x7fffcb73dd40, filename=<optimized out>) at /home/maticm/mydumper/0.6/myloader.c:257
#2 restore_databases (conf=conf@entry=0x7fffcb73dd40, conn=conn@entry=0x232c010) at /home/maticm/mydumper/0.6/myloader.c:198
#3 0x00000000004023e6 in main (argc=1, argv=0x7fffcb73de78) at /home/maticm/mydumper/0.6/myloader.c:153

[Max Bubenick (max-bubenick)]

Hi, thanks for the report could you please provide the gdb output from the latest code version without any modification?