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throw null and throw undefined crash in repl #16545

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IonicaBizau opened this issue Oct 27, 2017 · 4 comments
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throw null and throw undefined crash in repl #16545

IonicaBizau opened this issue Oct 27, 2017 · 4 comments
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repl Issues and PRs related to the REPL subsystem.

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@IonicaBizau
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  • Version: 8.6.0
  • Platform: macOS
  • Subsystem: High Sierra

While setTimeout(function(){throw null},0) doesn't crash anymore (as reported in #12373 and fixed in #14306), throw null (also throw undefined) seem to crash the toplevel.

I'd be happy to contribute if you give me a bit of guidance. 😄

$ node --version
v8.6.0
$ node
> throw null
TypeError: Cannot read property 'message' of null
    at REPLServer.defaultEval (repl.js:257:16)
    at bound (domain.js:301:14)
    at REPLServer.runBound [as eval] (domain.js:314:12)
    at REPLServer.onLine (repl.js:440:10)
    at emitOne (events.js:120:20)
    at REPLServer.emit (events.js:210:7)
    at REPLServer.Interface._onLine (readline.js:282:10)
    at REPLServer.Interface._line (readline.js:631:8)
    at REPLServer.Interface._ttyWrite (readline.js:911:14)
    at REPLServer.self._ttyWrite (repl.js:509:7)
> setTimeout(function() { throw null }, 0)
Timeout {
  _called: false,
  _idleTimeout: 1,
  _idlePrev: 
   TimersList {
     _idleNext: [Circular],
     _idlePrev: [Circular],
     _timer: Timer { '0': [Function: listOnTimeout], _list: [Circular] },
     _unrefed: false,
     msecs: 1,
     nextTick: false },
  _idleNext: 
   TimersList {
     _idleNext: [Circular],
     _idlePrev: [Circular],
     _timer: Timer { '0': [Function: listOnTimeout], _list: [Circular] },
     _unrefed: false,
     msecs: 1,
     nextTick: false },
  _idleStart: 8459,
  _onTimeout: [Function],
  _timerArgs: undefined,
  _repeat: null,
  _destroyed: false,
  domain: 
   Domain {
     domain: null,
     _events: { error: [Function: debugDomainError] },
     _eventsCount: 1,
     _maxListeners: undefined,
     members: [] },
  [Symbol(asyncId)]: 118,
  [Symbol(triggerAsyncId)]: 5 }
> Thrown: null
@mscdex mscdex added the repl Issues and PRs related to the REPL subsystem. label Oct 27, 2017
@bnoordhuis
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@IonicaBizau Look for a try/catch block around that line in lib/repl.js (I mean the first line of the stack trace) and please add one or two regression tests in test/parallel/test-repl.js. Don't hesitate to ask if you have questions.

@IonicaBizau
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@bnoordhuis Thank you very much! Will work on it these days.

@priyank-p
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@IonicaBizau i already got it fixed. Need to make a pull request after making test and linting

@IonicaBizau
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@cPhost Ah, cool! 👍 Thanks!

@priyank-p priyank-p mentioned this issue Oct 28, 2017
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@lance lance closed this as completed in bb59d2b Oct 31, 2017
Qard pushed a commit to ayojs/ayo that referenced this issue Nov 2, 2017
@priyank-p @Qard
repl: avoid crashing from null and undefined errors
4f7d6a3 
When `throw undefined` or `throw null` is executed, the REPL crashes.
This change does a check for `null|undefined` before accessing an
error's properties to prevent crashing.

Fixes: nodejs/node#16545
Fixes: nodejs/node#16607

PR-URL: nodejs/node#16574
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Lance Ball <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Jeremiah Senkpiel <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
Qard pushed a commit to ayojs/ayo that referenced this issue Nov 2, 2017
@priyank-p @Qard
repl: avoid crashing from null and undefined errors
747a74b 
When `throw undefined` or `throw null` is executed, the REPL crashes.
This change does a check for `null|undefined` before accessing an
error's properties to prevent crashing.

Fixes: nodejs/node#16545
Fixes: nodejs/node#16607

PR-URL: nodejs/node#16574
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Lance Ball <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Jeremiah Senkpiel <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
cjihrig pushed a commit to cjihrig/node that referenced this issue Nov 6, 2017
@priyank-p @cjihrig
repl: avoid crashing from null and undefined errors
05f9047 
When `throw undefined` or `throw null` is executed, the REPL crashes.
This change does a check for `null|undefined` before accessing an
error's properties to prevent crashing.

Fixes: nodejs#16545
Fixes: nodejs#16607

PR-URL: nodejs#16574
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Lance Ball <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Jeremiah Senkpiel <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
gibfahn pushed a commit that referenced this issue Nov 14, 2017
@priyank-p @gibfahn
repl: avoid crashing from null and undefined errors
d27ec13 
When `throw undefined` or `throw null` is executed, the REPL crashes.
This change does a check for `null|undefined` before accessing an
error's properties to prevent crashing.

Fixes: #16545
Fixes: #16607

PR-URL: #16574
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Lance Ball <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Jeremiah Senkpiel <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
addaleax pushed a commit to ayojs/ayo that referenced this issue Dec 7, 2017
@priyank-p @addaleax
repl: avoid crashing from null and undefined errors
b2779bb 
When `throw undefined` or `throw null` is executed, the REPL crashes.
This change does a check for `null|undefined` before accessing an
error's properties to prevent crashing.

Fixes: nodejs/node#16545
Fixes: nodejs/node#16607

PR-URL: nodejs/node#16574
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Lance Ball <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Jeremiah Senkpiel <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
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lib: fix issue throw null and throw undefined and also throw false crash in repl
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@mscdex @bnoordhuis @IonicaBizau @priyank-p