[wp-trac] [WordPress Trac] #46050: blocks.php - Invalid argument supplied for foreach()

[WordPress Trac]

#46050: blocks.php - Invalid argument supplied for foreach()
--------------------------+-----------------------------
 Reporter:  filosofem     |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Editor        |    Version:  5.0.3
 Severity:  critical      |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 I'm getting following error after upgrading to WP 5.0.3:

 Invalid argument supplied for foreach() in /wp-includes/blocks.php on line
 183\n

 As a result - output HTML is corrupted, some letters and words disappear
 in HTML resulting output.

 Code statement which generating error:

 {{{#!php
 <?php
 foreach ( $block['innerContent'] as $chunk ) { $block_content .=
 is_string( $chunk ) ? $chunk : render_block( $block['innerBlocks'][
 $index++ ] ); }
 }}}


 I'm using PHP 7.2.13 and MariaDB 10.3.8. Disabling all plugins and using
 default WP 5.0 theme - not helped at all.

 I tested it on PHP 5.6.39 and PHP 7.1.25 - all works fine. Bug appears on
 PHP 7.2.13 only.

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Ticket URL: <https://core.trac.wordpress.org/ticket/46050>
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