TestFailure Got 'receiver of "mcWorkingCopy" is nil' instead of 'key #NoSuchClass not found in SystemEnvironment'. MCMethodDefinitionTest(TestAsserter)>>assert:description:resumable: MCMethodDefinitionTest(TestAsserter)>>assert:description: MCMethodDefinitionTest(TestAsserter)>>assert:equals: [ :error | self assert: error messageText equals: 'key #NoSuchClass not found in SystemEnvironment' ] in MCMethodDefinitionTest>>testCannotLoad FullBlockClosure(BlockClosure)>>cull: Context>>evaluateSignal: Context>>handleSignal: Context>>handleSignal: MessageNotUnderstood(Exception)>>signal UndefinedObject(Object)>>doesNotUnderstand: #mcWorkingCopy [ :package | package mcWorkingCopy ifNotNil: [ :workingCopy | workingCopy modified: true ] ] in MCWorkingCopy class>>handleClassAndMethodsChange: Array(SequenceableCollection)>>do: MCWorkingCopy class>>handleClassAndMethodsChange: WeakMessageSend>>value: WeakMessageSend(MessageSend)>>cull: WeakMessageSend(MessageSend)>>cull:cull: [ action cull: anAnnouncement cull: announcer ] in WeakAnnouncementSubscription(AbstractAnnouncementSubscription)>>deliver: FullBlockClosure(BlockClosure)>>on:do: FullBlockClosure(BlockClosure)>>on:fork: WeakAnnouncementSubscription(AbstractAnnouncementSubscription)>>deliver: [ subscription deliver: anAnnouncement ] in SubscriptionRegistry>>deliver:to:startingAt: FullBlockClosure(BlockClosure)>>ifCurtailed: SubscriptionRegistry>>deliver:to:startingAt: SubscriptionRegistry>>deliver:to: SubscriptionRegistry>>deliver: SystemAnnouncer(Announcer)>>announce: UndefinedObject class(ClassDescription)>>addAndClassifySelector:withMethod:inProtocol: OpalCompiler>>install OpalCompiler>>install: MCMethodDefinition>>loadWithLoader: [ definition loadWithLoader: loader. self fail ] in MCMethodDefinitionTest>>testCannotLoad FullBlockClosure(BlockClosure)>>on:do: MCMethodDefinitionTest>>testCannotLoad MCMethodDefinitionTest(TestCase)>>performTest