Just saw the following code in the MySQL 2.23.55 source code.

The semi-colon after the if renders the if statement useless. Could someone explain if 
it is intentional. The comment indicates that it is.

Simon

   /*
      the following 'if', thought conceptually wrong,
      is a useful optimization nevertheless.
    */
    if (file->state != &file->s->state.state);
      file->s->state.state = *file->state;

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