[wp-trac] [WordPress Trac] #35466: `add_filter()` errors when `spl_object_hash()` not exists

[WordPress Trac]

#35466: `add_filter()` errors when `spl_object_hash()` not exists
--------------------------+-----------------------------
 Reporter:  yaquawa       |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  4.4.1
 Severity:  normal        |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 `add_filter()` will errors when the following conditions are met.

 1. `$function_to_add` is Closure
 2. `spl_object_hash` function not exists

 For example:

 {{{
 add_filter( 'template_include', function($args){
         return $args;
 },90 );
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/35466>
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