Problems reported:

parser/error_recovery/issue_46505_prime_6.crash:4:26: Expected a type, but got '>>'.
  stream2<T extends List<>>(T foo) {}
                         ^^

beginCompilationUnit(class)
  beginMetadataStar(class)
  endMetadataStar(0)
  beginClassOrNamedMixinApplicationPrelude(class)
    handleIdentifier(A, classOrMixinDeclaration)
    handleNoTypeVariables({)
    beginClassDeclaration(class, null, A)
      handleNoType(A)
      handleClassExtends(null, 1)
      handleClassNoWithClause()
      handleClassOrMixinImplements(null, 0)
      handleClassHeader(class, class, null)
      beginClassOrMixinBody(DeclarationKind.Class, {)
        beginMetadataStar(stream)
        endMetadataStar(0)
        beginMember()
          beginMethod(null, null, null, null, null, stream)
            handleNoType({)
            handleIdentifier(stream, methodDeclaration)
            beginTypeVariables(<)
              beginMetadataStar(T)
              endMetadataStar(0)
              handleIdentifier(T, typeVariableDeclaration)
              beginTypeVariable(T)
                handleTypeVariablesDefined(>, 1)
                handleIdentifier(List, typeReference)
                beginTypeArguments(<)
                  handleIdentifier(T, typeReference)
                  handleNoTypeArguments(>)
                  handleType(T, null)
                endTypeArguments(1, <, >)
                handleType(List, null)
              endTypeVariable(>, 0, extends, null)
            endTypeVariables(<, >)
            beginFormalParameters((, MemberKind.NonStaticMethod)
              beginMetadataStar(T)
              endMetadataStar(0)
              beginFormalParameter(T, MemberKind.NonStaticMethod, null, null, null)
                handleIdentifier(T, typeReference)
                handleNoTypeArguments(foo)
                handleType(T, null)
                handleIdentifier(foo, formalParameterDeclaration)
                handleFormalParameterWithoutValue())
              endFormalParameter(null, null, foo, null, null, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
            endFormalParameters(1, (, ), MemberKind.NonStaticMethod)
            handleNoInitializers()
            handleAsyncModifier(null, null)
            beginBlockFunctionBody({)
            endBlockFunctionBody(0, {, })
          endClassMethod(null, stream, (, null, })
        endMember()
        beginMetadataStar(stream2)
        endMetadataStar(0)
        beginMember()
          beginMethod(null, null, null, null, null, stream2)
            handleNoType(})
            handleIdentifier(stream2, methodDeclaration)
            beginTypeVariables(<)
              beginMetadataStar(T)
              endMetadataStar(0)
              handleIdentifier(T, typeVariableDeclaration)
              beginTypeVariable(T)
                handleTypeVariablesDefined(>, 1)
                handleIdentifier(List, typeReference)
                beginTypeArguments(<)
                  handleRecoverableError(Message[ExpectedType, Expected a type, but got '>>'., null, {lexeme: >>}], >>, >>)
                  handleIdentifier(, typeReference)
                  handleNoTypeArguments(>>)
                  handleType(, null)
                endTypeArguments(1, <, >)
                handleType(List, null)
              endTypeVariable(>, 0, extends, null)
            endTypeVariables(<, >)
            beginFormalParameters((, MemberKind.NonStaticMethod)
              beginMetadataStar(T)
              endMetadataStar(0)
              beginFormalParameter(T, MemberKind.NonStaticMethod, null, null, null)
                handleIdentifier(T, typeReference)
                handleNoTypeArguments(foo)
                handleType(T, null)
                handleIdentifier(foo, formalParameterDeclaration)
                handleFormalParameterWithoutValue())
              endFormalParameter(null, null, foo, null, null, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
            endFormalParameters(1, (, ), MemberKind.NonStaticMethod)
            handleNoInitializers()
            handleAsyncModifier(null, null)
            beginBlockFunctionBody({)
            endBlockFunctionBody(0, {, })
          endClassMethod(null, stream2, (, null, })
        endMember()
        beginMetadataStar(stream3)
        endMetadataStar(0)
        beginMember()
          beginMethod(null, null, null, null, null, stream3)
            handleNoType(})
            handleIdentifier(stream3, methodDeclaration)
            beginTypeVariables(<)
              beginMetadataStar(T)
              endMetadataStar(0)
              handleIdentifier(T, typeVariableDeclaration)
              beginTypeVariable(T)
                handleTypeVariablesDefined(T, 1)
                handleNoType(T)
              endTypeVariable(>, 0, null, null)
            endTypeVariables(<, >)
            beginFormalParameters((, MemberKind.NonStaticMethod)
              beginMetadataStar(T)
              endMetadataStar(0)
              beginFormalParameter(T, MemberKind.NonStaticMethod, null, null, null)
                handleIdentifier(T, typeReference)
                handleNoTypeArguments(foo)
                handleType(T, null)
                handleIdentifier(foo, formalParameterDeclaration)
                handleFormalParameterWithoutValue())
              endFormalParameter(null, null, foo, null, null, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
            endFormalParameters(1, (, ), MemberKind.NonStaticMethod)
            handleNoInitializers()
            handleAsyncModifier(null, null)
            beginBlockFunctionBody({)
            endBlockFunctionBody(0, {, })
          endClassMethod(null, stream3, (, null, })
        endMember()
      endClassOrMixinBody(DeclarationKind.Class, 3, {, })
    endClassDeclaration(class, })
  endTopLevelDeclaration()
endCompilationUnit(1, )