[wp-trac] [WordPress Trac] #50918: Failed to WordPress 5.5

[WordPress Trac]

#50918: Failed to WordPress 5.5
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 Reporter:  stinatreats      |       Owner:  (none)
     Type:  defect (bug)     |      Status:  closed
 Priority:  normal           |   Milestone:
Component:  Upgrade/Install  |     Version:  5.5
 Severity:  major            |  Resolution:  invalid
 Keywords:                   |     Focuses:
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Comment (by dd32):

 For future reference for others..

 The MD5 `494096091668ab9bd591a32331bc128b` here was for the `wordpress-5.5
 -no-content.zip`  file, so an expected hash value. As it's a package
 that's only used by WordPress during upgrade, the hash isn't exposed
 anywhere on WordPress.org currently (`6e346d80366a88d373de737d10f22008`
 for `wordpress-5.5-new-bundled.zip` would also be valid and expected)

 This error is related to WP_HTTP "successfully" downloading the file, but
 the MD5 of the downloaded file did not match the `Content-MD5` header
 supplied by the server. This indicates a failure of the HTTP transport (or
 far more unlikely a MITM attack or caching server failure).

 In this case, the download was "successful" but likely corrupt, either due
 to a network or filesystem issue. Retrying the update operation would
 likely succeed.

 As noted above, `d41d8cd98f00b204e9800998ecf8427e` is the MD5 for an empty
 file, I suspect a filesystem-related failure.

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Ticket URL: <https://core.trac.wordpress.org/ticket/50918#comment:4>
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