Currently there is a problem with print_r in ExceptionHandler formatter, if argument is an object and not simple POCO / DTO but one that contains links to other objects and so on, it becomes very not trivial to dump exception message.

For example, with DoctrineModule, DoctrineORMModule configured in application if i make test exception throw in onBootstrap of module throw new Exception('Evil exception occured'); then the only argument of first trace will be MvcEvent but since it contains information about a lot of in application my memory limit is not enough to log exception, even 512 Mb not enough to log exception.

Possible solution:

would be greate to introduce to ExceptionHandler attribute like traceArgumentLevel that will dump object only to needed level as Doctrine2 Debug::dump does.

@Maks3w what your thoughs on this one?