Bug #42244 Segmentation fault at rpl_handler.h

Description:
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `/data0/pushbuild/pb/bzr_mysql-6.0-rpl/148/bzr_mysql-6.0-rpl-exp/sql/mysqld --de'.
Program terminated with signal 11, Segmentation fault.
#0  0x00002b51993264c5 in pthread_kill () from /lib64/libpthread.so.0
#0  0x00002b51993264c5 in pthread_kill () from /lib64/libpthread.so.0
#1  0x0000000000d564b2 in my_write_core (sig=11) at stacktrace.c:309
#2  0x0000000000725281 in handle_segfault (sig=11) at mysqld.cc:2682
#3  <signal handler called>
#4  0x00000000009573de in ~Delegate (this=0x0) at rpl_handler.h:129
#5  0x0000000000957425 in ~Trans_delegate (this=0x0) at rpl_handler.h:142
#6  0x0000000000956bf4 in delegates_destroy () at rpl_handler.cc:118
#7  0x0000000000723d6b in clean_up (print_message=true) at mysqld.cc:1370
#8  0x0000000000726343 in unireg_abort (exit_code=1) at mysqld.cc:1299
#9  0x0000000000728b29 in main (argc=8, argv=0x7fff11ac71f8) at mysqld.cc:4563

How to repeat:
https://intranet.mysql.com/secure/pushbuild/showpush.pl?dir=bzr_mysql-6.0-rpl&order=148

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/67962

2819 He Zhenxing	2009-03-02
      BUG#42244 Segmentation fault at rpl_handler.h
      
      When some error caused the server to exit before calling
      delegates_init(), transaction_delegate, etc, were not initialzed,
      this would cause segmental fault when calling delegates_destroy
      because the latter does not check if the objects were NULL or not.
      
      Fixed the problem by only calling destruction on these objects if
      they are not NULL.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/69100

2821 He Zhenxing	2009-03-13
      BUG#42244 Segmentation fault at rpl_handler.h
      
      When some error caused the server to exit before calling
      delegates_init(), transaction_delegate, etc, were not initialzed,
      this would cause segmental fault when calling delegates_destroy
      because the latter does not check if the objects were NULL or not.
      
      Fixed the problem by only calling destruction on these objects if
      they are not NULL.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/69104

3115 He Zhenxing	2009-03-13
      BUG#42244 Segmentation fault at rpl_handler.h
      
      When some error caused the server to exit before calling
      delegates_init(), transaction_delegate, etc, were not initialzed,
      this would cause segmental fault when calling delegates_destroy
      because the latter does not check if the objects were NULL or not.
      
      Fixed the problem by only calling destruction on these objects if
      they are not NULL.

Pushed into 6.0.11-alpha (revid:alik@sun.com-20090324171507-s5aac9guj21l0jz6) (version source revid:zhenxing.he@sun.com-20090313081440-zdeme0527g611xpg) (merge vers: 6.0.11-alpha) (pib:6)

Can you provide 1 or 2 sentences explaining when users might encounter this issue, and what they would have to do to trigger it?

Thanks.

Hi, Jon

It can be triggered if a wrong option is give, for example, an option that requires a value is not provided with a value, or the value is not correct.

hi, Jon

This problem can only happen when starting the server, after server successfully started, it should never happen.

Documented bugfix in the 6.0.11 changelog as follows:

        If the server was started with an option that had a missing or
        invalid value, a subsequent error that would cause normally the
        server to shut down could cause it to crash instead.

Closed.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/84703

3108 He Zhenxing	2009-09-26
      Backporting WL#4398 WL#1720
      Backporting BUG#44058 BUG#42244 BUG#45672 BUG#45673
      Backporting BUG#45819 BUG#45973 BUG#39012

Pushed into 6.0.14-alpha (revid:alik@sun.com-20091027094604-9p7kplu1vd2cvcju) (version source revid:zhenxing.he@sun.com-20091026140226-uhnqejkyqx1aeilc) (merge vers: 6.0.14-alpha) (pib:13)

Already documented in 6.0.11; reclosing.

Pushed into 5.5.0-beta (revid:alik@sun.com-20091110093229-0bh5hix780cyeicl) (version source revid:alik@sun.com-20091027095744-rf45u3x3q5d1f5y0) (merge vers: 5.5.0-beta) (pib:13)

Also documented bugfix in the 5.5.0 changelog; closed.