# Bugs fixed:

* Security Fix: For servers built with yaSSL, a preauthorization buffer overflow could cause memory corruption or a server crash. We thank Evgeny Legerov from Intevydis for providing us with a proof-of-concept script that allowed us to reproduce this bug. (Bug#50227, CVE-2009-4484)
* Replication: FLUSH LOGS did not actually close and reopen the binary log index file. (Bug#48738) See also Bug#34582.
* Some prepared statements could raise an assertion when re-executed. (Bug#49570)
* Valgrind warnings for CHECKSUM TABLE were corrected. (Bug#49465)
* Specifying an index algorithm (such as BTREE) for SPATIAL or FULLTEXT indexes caused a server crash. These index types do not support algorithm specification, and it is now disallowed to do so. (Bug#49250)
* The optimizer sometimes incorrectly handled conditions of the form WHERE col_name='const1' AND col_name='const2'. (Bug#49199)
* Several strmake() calls had an incorrect length argument (too large by one). (Bug#48983)
* On Fedora 12, strmov() did not guarantee correct operation for overlapping source and destination buffer. Calls were fixed to use an overlap-safe version instead. (Bug#48866)
* Incomplete reset of internal TABLE structures could cause a crash with eq_ref table access in subqueries. (Bug#48709)
* Re-execution of a prepared statement could cause a server crash. (Bug#48508)
* The error message for ER_UPDATE_INFO was subject to buffer overflow or truncation. (Bug#48500)
* On Solaris, no stack trace was printed to the error log after a crash. (Bug#47391)
* Comparison with NULL values sometimes did not produce a correct result. (Bug#42760)
* When compressed MyISAM files were opened, they were always memory mapped, sometimes causing memory-swapping problems. To deal with this, a new system variable, myisam_mmap_size, was added to limit the amount of memory used for memory mapping of MyISAM files. (Bug#37408)