Inheritance/mixin clauses causing assertion to trigger

[daumayr]

Code that causes the problem:

class Test = ()(
      class D = ()()

      class C = Object <: D ()( )

      public class A = C ()()

      public class B = C ()()
)

public main: args = (
      ((Test new) A) new.
      ((Test new) B) new.
)

The problem only occurs when A and B have the same superclass, which has a mixin application.
Also, two different instances of the Test Class are needed for reproduction. The problem occurs during the instantiation of the B Object, the second Test instance is created without problems.

Stacktrace:

     java.lang.AssertionError
      	at som.compiler.MixinDefinition.sameSuperAndMixins(MixinDefinition.java:193)
      	at som.compiler.MixinDefinition.getCached(MixinDefinition.java:259)
      	at som.compiler.MixinDefinition.createClassFactory(MixinDefinition.java:273)
      	at som.interpreter.nodes.InstantiationNode.createClassFactory(InstantiationNode.java:26)
      	at som.interpreter.nodes.InstantiationNode$ClassInstantiationNode.instantiateClassWithNewClassFactory(InstantiationNode.java:84)
      	at som.interpreter.nodes.InstantiationNodeFactory$ClassInstantiationNodeGen.executeAndSpecialize(InstantiationNodeFactory.java:105)
      	at som.interpreter.nodes.InstantiationNodeFactory$ClassInstantiationNodeGen.execute(InstantiationNodeFactory.java:66)
      	at som.interpreter.nodes.dispatch.ClassSlotAccessNode.instantiateClassObject(ClassSlotAccessNode.java:87)
      	at som.interpreter.nodes.dispatch.ClassSlotAccessNode.read(ClassSlotAccessNode.java:63)
      	at som.interpreter.nodes.dispatch.ClassSlotAccessNode.read(ClassSlotAccessNode.java:27)
      	at som.interpreter.nodes.dispatch.CachedSlotRead.executeDispatch(CachedSlotRead.java:47)
      	at som.interpreter.nodes.dispatch.UninitializedDispatchNode$AbstractUninitialized.executeDispatch(UninitializedDispatchNode.java:134)
      	at som.interpreter.nodes.MessageSendNode$GenericMessageSendNode.doPreEvaluated(MessageSendNode.java:313)
      	at som.interpreter.nodes.MessageSendNode$AbstractUninitializedMessageSendNode.doPreEvaluated(MessageSendNode.java:177)
      	at som.interpreter.nodes.MessageSendNode$AbstractMessageSendNode.executeGeneric(MessageSendNode.java:128)
      	at som.interpreter.nodes.MessageSendNode$AbstractUninitializedMessageSendNode.executeGeneric(MessageSendNode.java:169)
      	at som.interpreter.Invokable.execute(Invokable.java:51)
      	at com.oracle.truffle.api.impl.DefaultCallTarget.callDirectOrIndirect(DefaultCallTarget.java:64)
      	at com.oracle.truffle.api.impl.DefaultDirectCallNode.call(DefaultDirectCallNode.java:43)
      	at som.interpreter.nodes.dispatch.ClassSlotAccessNode.instantiateClassObject(ClassSlotAccessNode.java:86)
      	at som.interpreter.nodes.dispatch.ClassSlotAccessNode.read(ClassSlotAccessNode.java:63)
      	at som.interpreter.nodes.dispatch.ClassSlotAccessNode.read(ClassSlotAccessNode.java:27)
      	at som.interpreter.nodes.dispatch.CachedSlotRead.executeDispatch(CachedSlotRead.java:47)
      	at som.interpreter.nodes.dispatch.UninitializedDispatchNode$AbstractUninitialized.executeDispatch(UninitializedDispatchNode.java:134)
      	at som.interpreter.nodes.MessageSendNode$GenericMessageSendNode.doPreEvaluated(MessageSendNode.java:313)
      	at som.interpreter.nodes.MessageSendNode$AbstractUninitializedMessageSendNode.doPreEvaluated(MessageSendNode.java:177)
      	at som.interpreter.nodes.MessageSendNode$AbstractMessageSendNode.executeGeneric(MessageSendNode.java:128)
      	at som.interpreter.nodes.MessageSendNode$AbstractUninitializedMessageSendNode.executeGeneric(MessageSendNode.java:169)
      	at som.interpreter.nodes.MessageSendNode$AbstractMessageSendNode.evaluateArguments(MessageSendNode.java:135)
      	at som.interpreter.nodes.MessageSendNode$AbstractMessageSendNode.executeGeneric(MessageSendNode.java:127)
      	at som.interpreter.nodes.MessageSendNode$AbstractUninitializedMessageSendNode.executeGeneric(MessageSendNode.java:169)
      	at som.instrumentation.MessageSendNodeWrapper$MessageSendWrapper.executeGeneric(MessageSendNodeWrapper.java:71)
      	at som.interpreter.nodes.SequenceNode.executeAllButLast(SequenceNode.java:50)
      	at som.interpreter.nodes.SequenceNode.executeGeneric(SequenceNode.java:43)