Symfony 4.3 / Composer: Ambiguous class resolution for symfony/contracts

[wbrinkman]

Using this bundle (v1.6.0) with Symfony 4.3 will have Composer generate a couple of "Warning: Ambiguous class resolution" when trying to generate an optimized autoloader.

$ composer dump-autoload --optimize

Generating optimized autoload files
Warning: Ambiguous class resolution, "Symfony\Contracts\Cache\CallbackInterface" was found in both "/var/www/vendor/symfony/cache-contracts/CallbackInterface.php" and "/var/www/vendor/symfony/contracts/Cache/CallbackInterface.php", the first will be used.
Warning: Ambiguous class resolution, "Symfony\Contracts\Cache\ItemInterface" was found in both "/var/www/vendor/symfony/cache-contracts/ItemInterface.php" and "/var/www/vendor/symfony/contracts/Cache/ItemInterface.php", the first will be used.
Warning: Ambiguous class resolution, "Symfony\Contracts\Cache\CacheInterface" was found in both "/var/www/vendor/symfony/cache-contracts/CacheInterface.php" and "/var/www/vendor/symfony/contracts/Cache/CacheInterface.php", the first will be used.
(snip)

The framework will load some traits and interfaces from /symfony/service-contracts/ while /webpack-encore-bundle/ will try to load the same from /symfony/contracts/

$ composer why symfony/contracts

symfony/webpack-encore-bundle  v1.6.0  requires  symfony/contracts (^1.0)  

$ composer why symfony/service-contracts

symfony/cache                 v4.3.0  requires  symfony/service-contracts (^1.1)    
symfony/console               v4.3.0  requires  symfony/service-contracts (^1.1)    
symfony/dependency-injection  v4.3.0  requires  symfony/service-contracts (^1.1.2)  
symfony/doctrine-bridge       v4.3.0  requires  symfony/service-contracts (^1.1)    
symfony/expression-language   v4.3.0  requires  symfony/service-contracts (^1.1)    
symfony/monolog-bridge        v4.3.0  requires  symfony/service-contracts (^1.1)    
symfony/security-core         v4.3.0  requires  symfony/service-contracts (^1.1)    
symfony/stopwatch             v4.3.0  requires  symfony/service-contracts (^1.0)   

Could this bundle bump it's requirement to symfony/service-contracts too?

[nicolas-grekas]

Yes, please send a PR