我希望有人能帮助我调试 apache2 错误。由于某些原因，我最近在某个系统上收到很多错误：
Sat Oct 10 16:49:24.101959 2015] [core:notice] [pid 18380] AH00051: child pid 2126 exit signal Bus error (7), possible coredump in /tmp/apache-coredumps
[Sat Oct 10 16:50:35.178108 2015] [core:notice] [pid 18380] AH00051: child pid 1971 exit signal Bus error (7), possible coredump in /tmp/apache-coredumps
[Sat Oct 10 16:50:43.188837 2015] [core:notice] [pid 18380] AH00051: child pid 2413 exit signal Bus error (7), possible coredump in /tmp/apache-coredumps
我尝试使用 gdb 进行调试，但我不知道在 coredump 上释放 gdp 后该怎么做。这是 gdb 输出：
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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Reading symbols from apache2...Reading symbols from /usr/lib/debug//usr/sbin/apache2...done.
done.
[New LWP 2126]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
warning: the debug information found in "/usr/lib/debug//usr/lib/php5/20121212/mysql.so" does not match "/usr/lib/php5/20121212/mysql.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/lib/php5/20121212/mysql.so" does not match "/usr/lib/php5/20121212/mysql.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug//usr/lib/php5/20121212/mysqli.so" does not match "/usr/lib/php5/20121212/mysqli.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/lib/php5/20121212/mysqli.so" does not match "/usr/lib/php5/20121212/mysqli.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug//usr/lib/php5/20121212/pdo_mysql.so" does not match "/usr/lib/php5/20121212/pdo_mysql.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/lib/php5/20121212/pdo_mysql.so" does not match "/usr/lib/php5/20121212/pdo_mysql.so" (CRC mismatch).
Core was generated by `/usr/sbin/apache2 -k start'.
Program terminated with signal SIGBUS, Bus error.
#0 0x00007f296c7b87b0 in crc32 () from /lib/x86_64-linux-gnu/libz.so.1
有人能帮助我完成下一步吗？