[wp-trac] [WordPress Trac] #29557: PHP ≤ 5.4.8 Crashes on '[' Character in Posts

[WordPress Trac]

#29557: PHP ≤ 5.4.8 Crashes on '[' Character in Posts
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 Reporter:  MrBobDobolina                             |       Owner:
     Type:  defect (bug)                              |      Status:  new
 Priority:  highest omg bbq                           |   Milestone:  4.0.1
Component:  Formatting                                |     Version:  4.0
 Severity:  blocker                                   |  Resolution:
 Keywords:  wptexturize has-patch commit fixed-major  |     Focuses:
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Comment (by miqrogroove):

 Found a small refinement and added more tests based on ideas above.

 In miqro-29557.7.patch:
 * Revert parts of miqro-29557.5.patch.
 * Revert parts of [28773] and [28727].
 * Do not crash PHP.  Make the pattern quantifier possessive to avoid
 backtracks.
 * Do not break unregistered shortcodes, e.g. [hello attr="value"].
 * Do not break HTML in shortcode attributes, e.g. [hello attr="<"].
 * Do not match for shortcodes when there is extra whitespace, e.g. [ hello
 ].
 * Add unit tests to show #12690 was not fully resolved.
 * Tested PHP 5.2.4, 5.2.13, 5.4.32, and 5.5.8.

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Ticket URL: <https://core.trac.wordpress.org/ticket/29557#comment:69>
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