PHP debugging backtrace
=======================
array(3) {
  [1]=>
  array(4) {
    ["file"]=>
    string(40) "/var/www/html/cqpweb/lib/library.inc.php"
    ["line"]=>
    int(262)
    ["function"]=>
    string(20) "exiterror_mysqlquery"
    ["args"]=>
    array(3) {
      [0]=>
      &int(1062)
      [1]=>
      &string(100) "Duplicate entry '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' for key 'PRIMARY'"
      [2]=>
      &string(235) "
                        INSERT INTO freq_corpus_rsc_v1_17_word 
                                select sum(freq) as f, word as item 
                                        from temporary_freq_corpus_rsc_v1_17
                                        group by word 
        /* from User: cqpwebAdmin | Function: corpus_make_freqtables() | 2016-03-10 16:43:53 */"
    }
  }
  [2]=>
  array(4) {
    ["file"]=>
    string(42) "/var/www/html/cqpweb/lib/freqtable.inc.php"
    ["line"]=>
    int(150)
    ["function"]=>
    string(14) "do_mysql_query"
    ["args"]=>
    array(1) {
      [0]=>
      &string(145) "
                        INSERT INTO freq_corpus_rsc_v1_17_word 
                                select sum(freq) as f, word as item 
                                        from temporary_freq_corpus_rsc_v1_17
                                        group by word"
    }
  }
  [3]=>
  array(4) {
    ["file"]=>
    string(46) "/var/www/html/cqpweb/bin/offline-freqlists.php"
    ["line"]=>
    int(136)
    ["function"]=>
    string(22) "corpus_make_freqtables"
    ["args"]=>
    array(1) {
      [0]=>
      &string(9) "rsc_v1_17"
    }
  }
}