undefined method named "of" of class "GuzzleHttp\Promise\Coroutine" about promises

[GrahamCampbell]

Looks like you need to restart php-fpm because you have a stale cache of the Coroutine.php file. Either that, or you need to delete you vendor folder and composer cache, and run composer update.

[keulinho]

We have immutable infrastructure and build the whole container anew for each update, including the composer dependencies.
Meaning restarting php-fpm or running composer update should not have any affect as we do a clean composer install each time.

The logs from composer update clearly state that it installed v1.4.0:

  - Downloading guzzlehttp/psr7 (1.7.0)
  - Downloading guzzlehttp/promises (1.4.0)
  - Downloading guzzlehttp/guzzle (6.5.2)

The thing that confuses me most is that functions.php has to be up2date as it tries to make the "new" call to the Coroutine::of() method, but the loaded Coroutine class, that should be loaded from the same folder/namespace seems to be an old version that does not have the of() method. 🤔

[GrahamCampbell]

That indicates there is not a bug here, just that your vendor folder didn't get updated properly. Delete you composer cache directory as well as the vendor folder. The 1.4.0 zip definitely has the correct files in it: https://github.com/guzzle/promises/archive/1.4.0.zip.

[keulinho]

After quite some debugging we found the source for this problems. The Coroutine class was autoloaded from another vendor folder than the functions file.

But thank you for your fast replies & your support.