Incorrect line number for PhanPluginMixedKeyNoKey and nested arrays

[anomiex]

Phan version: 5.4.3, v5.x-dev 790e4f7
php-ast version: 1.1.1

Reproduction

1. Create the following file

   <?php
   
   $var2 = array(
       1,
       'xxx' => 1,
   );
   
   $var = array(
       array(
           1,
       ),
       'xxx' => array(
           1,
       ),
   );

2. Do phan --init, then run phan --plugin DuplicateArrayKeyPlugin test.php

Expected results

Errors reported on either the line of the array( or the line of the first element, e.g.

test.php:4 PhanPluginMixedKeyNoKey Should not mix array entries of the form [key => value,] with entries of the form [value,].
test.php:9 PhanPluginMixedKeyNoKey Should not mix array entries of the form [key => value,] with entries of the form [value,].

Actual results

For the nested array, the error is reported on the line of the first element of the nested array, even though that array does not have the problem.

test.php:4 PhanPluginMixedKeyNoKey Should not mix array entries of the form [key => value,] with entries of the form [value,].
test.php:10 PhanPluginMixedKeyNoKey Should not mix array entries of the form [key => value,] with entries of the form [value,].

Other notes

Probably the real bug is somewhere in PHP itself, putting the wrong line number in the AST. No idea where to begin reporting that though.