hellofromTonya 4ab4b38ecd External Libraries: Skip instanceof check when null in Text_Diff::_check(). ... On the first `foreach` loop in Text_Diff::_check()`, `$prevtype` is `null`. As `instanceof` requires the class name term to be an object or string, a fatal error is thrown: >Fatal error: Uncaught Error: Class name must be a valid object or a string on line 279 This change: * Adds a simple test for the `Text_Diff::_check()` method, which is how the bug was discovered as the test could never pass with the code as-is. * Adds a defensive guard to protect against the fatal. It checks if `$prevtype` is not `null` as a pre-condition to for checking the instance. This bugfix also resolves the failing test. Follow-up to [49194], [7747]. Props jrf, hellofromTonya. See #62083. Built from https://develop.svn.wordpress.org/trunk@59070 git-svn-id: http://core.svn.wordpress.org/trunk@58466 1a063a9b-81f0-0310-95a4-ce76da25c4cd		2024-09-19 20:22:15 +00:00
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Diff.php	External Libraries: Skip instanceof check when null in Text_Diff::_check().	2024-09-19 20:22:15 +00:00