regression in Symfony v3.4.5

[lsmith77]

causes:
FriendsOfSylius/SyliusImportExportPlugin#54

my band-aid fix was to set a conflict on ^3.4.5
FriendsOfSylius/SyliusImportExportPlugin#76

already reported the issue to the symfony core team:
symfony/symfony#26397

[lsmith77]

ok the issue seems to be caused by the use of https://github.com/PolishSymfonyCommunity/SymfonyMockerContainer/blob/master/src/PSS/SymfonyMockerContainer/DependencyInjection/MockerContainer.php#L7

[lsmith77]

cc @kix @jakzal

[kix]

@lsmith77, my contribution to SymfonyMockerContainer was quite small, just a fix in an exception message; I'm not quite sure I can be very helpful here. Please correct me if I'm wrong.

[jakzal]

Not sure if it's related. MockerContainer doesn't override the constructor.

[lsmith77]

FYI I have a fix here symfony/symfony#26427

BTW the issue is specifically introduced because the MockContainer does not have a constructor

[pamil]

Should be fixed now.