[wp-trac] [WordPress Trac] #54558: Notice: Undefined index in WordPress 5.9 Beta

[WordPress Trac]

#54558: Notice: Undefined index in WordPress 5.9 Beta
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 Reporter:  kafleg        |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  General       |     Version:
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by costdev):

 Thanks for reporting this issue @kafleg!

 == Test Report

 === Env
 * WordPress 5.9-beta1-52296-src
 * Chrome 96.0.4664.45
 * Windows 10
 * Theme: Twenty Twenty Two
 * Gutenberg Editor
 * Plugin: None activated

 === Steps to test
 1. Navigate to `Appearance > Site Editor`.
 2. Navigate to `Template Parts`.

 === Results
 The reported notice is displayed:
  Notice: Undefined index: path in <path>/src/wp-includes/rest-api.php on
 line 2854

 === Notes
 - This is caused by the `?context=edit` path missing a leading slash.
 - When a leading slash is added, the notice no longer appears.

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Ticket URL: <https://core.trac.wordpress.org/ticket/54558#comment:1>
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