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    BUG#21077: Possible crash caused by invalid sequence of handler::* calls: ... · 9907e970
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    BUG#21077: Possible crash caused by invalid sequence of handler::* calls:                                                
    The crash was caused by invalid sequence of handler::** calls:                                                           
      ha_smth->index_init();                                                                                                 
      ha_smth->index_next_same(); (2)                                                                                        
    (2) is an invalid call as it was not preceeded by any 'scan setup' call
    like index_first() or index_read(). The cause was that QUICK_SELECT::reset()
    didn't "fully reset" the quick select- current QUICK_RANGE wasn't forgotten,
    and quick select might attempt to continue reading the range, which would
    result in the above mentioned invalid sequence of handler calls.
    
    5.x versions are not affected by the bug - they already have the missing
    "range=NULL" clause.                                                    
                                                           
    
    
    mysql-test/r/innodb_mysql.result:
      Testcase for BUG#21077
    mysql-test/t/innodb_mysql.test:
      Testcase for BUG#21077
    sql/opt_range.h:
      BUG#21077: Possible crash caused by invalid sequence of handler::* calls:                                              
       - Make QUICK_SELECT::reset() really reset the quick select
    9907e970
innodb_mysql.test 3.65 KB