In Walker::walk() and Walker::paged_walk(), $id_field is set and never used.
See #27882. Built from https://develop.svn.wordpress.org/trunk@28322 git-svn-id: http://core.svn.wordpress.org/trunk@28150 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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@@ -189,7 +189,6 @@ class Walker {
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if (empty($elements)) //nothing to walk
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return $output;
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$id_field = $this->db_fields['id'];
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$parent_field = $this->db_fields['parent'];
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// flat display
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@@ -276,7 +275,6 @@ class Walker {
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$args = array_slice( func_get_args(), 4 );
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$output = '';
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$id_field = $this->db_fields['id'];
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$parent_field = $this->db_fields['parent'];
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$count = -1;
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