PHP 7.4 - Archive_Tar->_readHeader() throws deprecations

[mondrake]

Testing PHP 7.4 with Drupal 8.8.x we get the following error:

PHPUnit 7.5.16 by Sebastian Bergmann and contributors.

Testing Drupal\Tests\config\Functional\ConfigImportUploadTest
E                                                                   1 / 1 (100%)

Time: 7.46 seconds, Memory: 4.00 MB

There was 1 error:

1) Drupal\Tests\config\Functional\ConfigImportUploadTest::testImport
Exception: Deprecated function: Invalid characters passed for attempted 
conversion, these have been ignored
Archive_Tar->_readHeader()() (Line: 1695)


/var/www/html/core/lib/Drupal/Core/Test/HttpClientMiddleware/TestHttpCl
ientMiddleware.php:51
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:203
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:156
/var/www/html/vendor/guzzlehttp/promises/src/TaskQueue.php:47
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:246
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:223
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:267
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:225
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:62
/var/www/html/vendor/guzzlehttp/guzzle/src/Client.php:131
/var/www/html/vendor/fabpot/goutte/Goutte/Client.php:180
/var/www/html/vendor/symfony/browser-kit/Client.php:318
/var/www/html/vendor/symfony/browser-kit/Client.php:259
/var/www/html/vendor/behat/mink-browserkit-
driver/src/BrowserKitDriver.php:696
/var/www/html/vendor/behat/mink-browserkit-
driver/src/BrowserKitDriver.php:480
/var/www/html/vendor/behat/mink/src/Element/NodeElement.php:153
/var/www/html/vendor/behat/mink/src/Element/NodeElement.php:161
/var/www/html/core/tests/Drupal/Tests/UiHelperTrait.php:100
/var/www/html/core/tests/Drupal/Tests/UiHelperTrait.php:209
/var/www/html/core/modules/config/tests/src/Functional/ConfigImportUpl
oadTest.php:50

ERRORS!
Tests: 1, Assertions: 9, Errors: 1.

[mrook]

Interesting, the tests seem to pass on 7.4. Can you attach the archive that's failing for you? There seems to be something going on with the checksum.

[alexpott]

What's failing for us is a test where we're testing passing an archive that's not an archive to ArchiveTar - we're just throwing a text file at it. In PHP 7.3 and below we catch the error and display a useful message to the user. On PHP7.4 the checksum gPO:.cM< causes a deprecation error.

The file we're using: text-0.txt

[alexpott]

This is what we're dealing with https://3v4l.org/6bshb