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Promise.coroutine: yielding a function should not call the function #1314

giltayar opened this issue Jan 4, 2017 · 4 comments


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giltayar commented Jan 4, 2017

  1. What version of bluebird is the issue happening on?

  2. What platform and version? (For example Node.js 0.12 or Google Chrome 32)
    Tested on Node 7, but I'm guessing it's true for all platforms

  3. Did this issue happen with earlier version of bluebird?


(Promise.coroutine(function*() {
  yield function () { console.log('hi'); };

You would not expect "hi" to be written to log, because we're yielding a value (which is a function), and not calling the function.

But it does print "hi". And then returns a rejected error.

I have prepared a pull-request that contains a fix, which I will submit in a few minutes.

giltayar pushed a commit to giltayar/bluebird that referenced this issue Jan 4, 2017

   When rejecting a non-promise value, string.replace is used,
    and the value is passed as second parameter.
    But string.replace, if the second value is a function, will
    call that function.
    This commit fixes this by using value.toString().
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Fix LGTM. @petkaantonov ptal.

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+ "" is sufficient

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Or String(value)

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giltayar commented Jan 5, 2017

I chose @benjamingr's change - it seems more explicit to me. Thanks for pointing the (I hope slightly) awkward code out.

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