parseUnit(main)
  skipErrorTokens(main)
  listener: beginCompilationUnit(main)
  syntheticPreviousToken(main)
  parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
    parseMetadataStar()
      listener: beginMetadataStar(main)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl()
      listener: beginTopLevelMember(main)
      parseTopLevelMethod(, null, , Instance of 'NoType', null, main)
        listener: beginTopLevelMethod(, null)
        listener: handleNoType()
        ensureIdentifier(, topLevelFunctionDeclaration)
          listener: handleIdentifier(main, topLevelFunctionDeclaration)
        parseMethodTypeVar(main)
          listener: handleNoTypeVariables(()
        parseGetterOrFormalParameters(main, main, false, MemberKind.TopLevelMethod)
          parseFormalParameters(main, MemberKind.TopLevelMethod)
            parseFormalParametersRest((, MemberKind.TopLevelMethod)
              listener: beginFormalParameters((, MemberKind.TopLevelMethod)
              listener: endFormalParameters(0, (, ), MemberKind.TopLevelMethod)
        parseAsyncModifierOpt())
          listener: handleAsyncModifier(null, null)
          inPlainSync()
        parseFunctionBody(), false, false)
          listener: beginBlockFunctionBody({)
          notEofOrValue(}, foo)
          parseStatement({)
            parseStatementX({)
              parseExpressionStatementOrDeclarationAfterModifiers({, {, null, null, null, false)
                looksLikeLocalFunction(foo)
                parseExpressionStatement({)
                  parseExpression({)
                    parsePrecedenceExpression({, 1, true)
                      parseUnaryExpression({, true)
                        parsePrimary({, expression)
                          parseSendOrFunctionLiteral({, expression)
                            parseSend({, expression)
                              ensureIdentifier({, expression)
                                listener: handleIdentifier(foo, expression)
                              listener: handleNoTypeArguments(=)
                              parseArgumentsOpt(foo)
                                listener: handleNoArguments(=)
                              listener: handleSend(foo, =)
                      parsePrecedenceExpression(=, 1, true)
                        parseUnaryExpression(=, true)
                          parsePrimary(=, expression)
                            parseLiteralInt(=)
                              listener: handleLiteralInt(42)
                      listener: handleAssignmentExpression(=)
                  ensureSemicolon(42)
                  listener: handleExpressionStatement(;)
          notEofOrValue(}, })
          listener: endBlockFunctionBody(1, {, })
        listener: endTopLevelMethod(main, null, })
  listener: endTopLevelDeclaration()
  reportAllErrorTokens(main)
  listener: endCompilationUnit(1, )