googleprojectzero / googleprojectzero/fuzzilli

Feature problem: yieldEach

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Dominant language
Swift
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Description

Problem

By JS definition MDN , what is passed to yieldeach must be an iterable object.

YieldGenerator, GeneratorFunctionGenerator, AsyncGeneratorFunctionGenerator use b.yieldEach(b.randomVariable()),

where randomVariable is likely to be a non-iteratable object such as an integer.

Q:

I believe I might be able to fix this issue by buildIteratorVariable method that can generate some iterable objects. Would it be alright if I submitted a pull request to address this?

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the YieldGenerator, GeneratorFunctionGenerator, and AsyncGeneratorFunctionGenerator code that calls b.yieldEach(b.randomVariable()), then inspect how generated values are selected. The change is complete when yieldEach receives an iterable value in these cases and the relevant generator behavior is covered by the project's existing tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript, swift
Domain
testing
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
40/100

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