memory issue ? 
 
The mysql command line client could misinterpret some character 
sequences as commands under some circumstances. 
 
The upper limit for internal readline buffer was raised to 1 GB 
(the same as for server's max_allowed_packet) so that any input 
line is processed by add_line() as a whole rather than in 
chunks.

client/mysql.cc:
  The upper limit for internal readline buffer was raised to 1 GB 
  (the same as for server's max_allowed_packet) so that any input 
  line is processed by add_line() as a whole rather than in 
  chunks.
mysql-test/r/mysql-bug45236.result:
  Added a test case for bug #45236.
mysql-test/t/mysql-bug45236.test:
  Added a test case for bug #45236.