Upgrade to NC 15: Integrity check fails on core/js/mimetypelist.js

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Nextcloud version (eg, 12.0.2): 15
Operating system and version (eg, Ubuntu 17.04): docker: fpm-alpine

The issue you are facing:

The integrity checker fails after the upgrade on the file core/js/mimetypelist.js. Looked on forum for resolution and saw that the closest one suggests to turn off integrity check, and that is frowned upon, but I could find no actual resolution to the issue.

Is this the first time you’ve seen this error? (Y/N): Y

Steps to replicate it:

  1. Upgrade to version 15
  2. Go to overview and see result of integrity check.

The output of your Nextcloud log in Admin > Logging:

Technical information
The following list covers which files have failed the integrity check. Please read
the previous linked documentation to learn more about the errors and how to fix

- core
		- core/js/mimetypelist.js

Raw output
    [core] => Array
            [INVALID_HASH] => Array
                    [core/js/mimetypelist.js] => Array
                            [expected] => dc48de7ad4baa030c5e563350c9a80b274bad783f6f5adbf1595ecef6c6a32e52890a24cb26cddb0aa20193ba52c001150c68d8bfb567f0aed566f4029a190a3
                            [current] => 53613657e01ad07fb878200f174a72a8ac062f6f3d52624034c85157a2bd7517b6b79b18ddad5b312319e7d9bec6b1d409c8ec9098480a356777e0dcee2f39f8




The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

$CONFIG = array (
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'apps_paths' =>
  array (
    0 =>
    array (
      'path' => '/var/www/html/apps',
      'url' => '/apps',
      'writable' => false,
    1 =>
    array (
      'path' => '/var/www/html/custom_apps',
      'url' => '/custom_apps',
      'writable' => true,
  'memcache.locking' => '\\OC\\Memcache\\Redis',
  'redis' =>
  array (
    'host' => 'redis',
    'port' => 6379,
  'instanceid' => '*******',
  'passwordsalt' => '******',
  'secret' => '*************',
  'trusted_domains' =>
  array (
    0 => '**************',
  'datadirectory' => '/var/www/html/data',
  'overwrite.cli.url' => '************',
  'dbtype' => 'mysql',
  'version' => '',
  'dbname' => '***********',
  'dbhost' => '************',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => '********',
  'dbpassword' => '***********',
  'installed' => true,
  'mail_smtpmode' => 'smtp',
  'mail_smtpauthtype' => 'PLAIN',
  'mail_from_address' => '*********',
  'mail_domain' => '*******',
  'mail_smtphost' => '******',
  'mail_smtpport' => '25',
  'maintenance' => false,
  'updater.release.channel' => 'production',
  'loglevel' => 2,
  'theme' => '',

Same issue. Not a problem last night, installed a couple nextcloud apps this morning and this.
Maybe there’s a way to see when an app was installed and identify the culprit?

A lead though, It appears the mimetypelist.js file has a time stamp the same time mindmap was installed.

Shouldn’t these apps update (or request an update to) the checksum(s) of the files they touch?