Question

我正在尝试使用Truffle 4.1.0来调试Solidity代码。调试器正常启动，显示第一行，但您无法完成合同！

终端显示的错误的完整堆栈跟踪是：

 TypeError: Cannot read property 'line' of undefined
     at Object.formatRangeLines (/usr/local/lib/node_modules/truffle/build/webpack:/~/truffle-debug-utils/index.js:201:1)
     at printState (/usr/local/lib/node_modules/truffle/build/webpack:/~/truffle-core/lib/commands/debug.js:125:1)
     at Object.interpreter (/usr/local/lib/node_modules/truffle/build/webpack:/~/truffle-core/lib/commands/debug.js:404:1)
     at ReplManager.interpret (/usr/local/lib/node_modules/truffle/build/webpack:/~/truffle-core/lib/repl.js:119:1)
     at bound (domain.js:280:14)
     at REPLServer.runBound [as eval] (domain.js:293:12)
     at REPLServer.<anonymous> (repl.js:539:10)
     at emitOne (events.js:96:13)
     at REPLServer.emit (events.js:188:7)
     at REPLServer.Interface._onLine (readline.js:232:10)
     at REPLServer.Interface._line (readline.js:583:8)
     at REPLServer.Interface._ttyWrite (readline.js:860:14)
     at REPLServer.self._ttyWrite (repl.js:612:7)
     at ReadStream.onkeypress (readline.js:119:10)
     at emitTwo (events.js:106:13)
     at ReadStream.emit (events.js:191:7)
     at emitKeys (internal/readline.js:389:14)
     at next (native)
     at ReadStream.onData (readline.js:970:36)
     at emitOne (events.js:96:13)
     at ReadStream.emit (events.js:188:7)
     at readableAddChunk (_stream_readable.js:176:18)
     at ReadStream.Readable.push (_stream_readable.js:134:10)
     at TTY.onread (net.js:547:20)

深入研究方法formatRangeLines: function(source, range, contextBefore) 当console.log(range);打印时：

{ start: undefined, end: undefined }

实际上，在此块访问range.start时引发了异常：

var startBeforeIndex = Math.max(
  range.start.line - contextBefore, 0
);

有什么建议吗？谢谢，

Answer 1

更新：此问题已在Truffle 4.1.4版（reference）解决。

但是，如果您更新了Truffle版本，但仍然遇到问题。尝试在您的控制台上运行（这是为了强制更新所有已编译的智能合约＆＃39;字节码，以便根据最新版本）：

| | Grouping || First Header | Second Header | Third Header | ------------ | :-----------: | -----------: | Content | *Long Cell* || Content | **Cell** | Cell | New section | More | Data | And more | With an escaped '\|' || [Prototype table]

由于当前版本的Truffle Debugger（即实验版）存在错误，调试器无法跳转到另一个文件。

此处引发了错误：https://github.com/trufflesuite/truffle/issues/826

因此，要克服当前的错误，所有智能合约代码必须在一个文件中。希望有一个工具可以帮助解决这个问题：https://github.com/poanetwork/solidity-flattener

truffle debugger：TypeError：无法读取属性＆＃39; line＆＃39;未定义的

1 个答案: