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fix(pairwise): make it recursion-proof #4743

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merged 1 commit into from May 9, 2019
Merged

fix(pairwise): make it recursion-proof #4743

merged 1 commit into from May 9, 2019

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thorn0
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@thorn0 thorn0 commented Apr 26, 2019

Description: pairwise calls next before saving the current value as the previous one, which makes it not recursively re-enterable. If its subscriber synchronously triggers the input observable, pairwise erroneously emits a pair with the wrong previous value.

Related issue: reduxjs/redux#3404

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coveralls commented Apr 27, 2019 •
edited

Pull Request Test Coverage Report for Build 8430

  • 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
  • 1 unchanged line in 1 file lost coverage.
  • Overall coverage decreased (-0.2%) to 96.678%
Files with Coverage Reduction New Missed Lines %
src/internal/OuterSubscriber.ts 1 50.0%
Totals Coverage Status
Change from base Build 8414: -0.2%
Covered Lines: 5210
Relevant Lines: 5389
💛 - Coveralls

@thorn0 thorn0 changed the title fix(pairwise): make it recursion-pron fix(pairwise): make it recursion-proof Apr 27, 2019
cartant
cartant approved these changes Apr 27, 2019
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LGTM

@benlesh benlesh merged commit 21ab261 into ReactiveX:master May 9, 2019
BioPhoton pushed a commit to BioPhoton/rxjs that referenced this pull request May 15, 2019
@thorn0 @BioPhoton
fix(pairwise): make it recursion-proof (ReactiveX#4743)
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@cartant cartant cartant approved these changes

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