The cause for the bug is that the priorities of all rules/terminals
that process the FROM clause are not fully specified, and the
parser generator produces a parser that doesn't always parse
the FROM clause so that JOINs are left-associative. As a result
the final join tree produced by the parser is incorrect, which
is the cause for subsequent name resolution to fail.


mysql-test/r/select.result:
  Test for BUG#13832.
mysql-test/t/select.test:
  Test for BUG#13832.
sql/sql_yacc.yy:
  Fix for BUG#13832 - Unknown column t1.a in 'on clause'.
  
  List all join-related operators as having lower priority
  than the join operands to make the parser process join-
  related productions from left to right.