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Prevent crash for recursive "this" deoptimization #4091

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merged 8 commits into from May 25, 2021

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lukastaegert
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This PR contains:

  • bugfix
  • feature
  • refactor
  • documentation
  • other

Are tests included?

  • yes (bugfixes and features will not be merged without tests)
  • no

Breaking Changes?

  • yes (breaking changes will not be merged unless absolutely necessary)
  • no

List any relevant issue numbers:
Resolves #4089

Description

Apparently there are scenarios where deoptimizing "this" in a method could lead to an infinite loop, terminated by an out-of-memory error. This is fixed here by tracking which deoptimizations already happened.

Base automatically changed from switch-to-eslint to master May 25, 2021 10:36
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github-actions bot commented May 25, 2021

Thank you for your contribution! ❤️

You can try out this pull request locally by installing Rollup via

npm install rollup/rollup#gh-4089-recursive-this-deoptimization

or load it into the REPL:
https://rollupjs.org/repl/?pr=4091

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codecov bot commented May 25, 2021

Codecov Report

Merging #4091 (d7a9dfb) into master (32d1b60) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Impacted file tree graph

@@           Coverage Diff           @@
##           master    #4091   +/-   ##
=======================================
  Coverage   98.01%   98.01%           
=======================================
  Files         201      201           
  Lines        6992     6994    +2     
  Branches     2053     2054    +1     
=======================================
+ Hits         6853     6855    +2     
  Misses         66       66           
  Partials       73       73           
Impacted Files Coverage Δ
src/ast/variables/ThisVariable.ts 100.00% <100.00%> (ø)

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@lukastaegert lukastaegert merged commit 90d2e62 into master May 25, 2021
@lukastaegert lukastaegert deleted the gh-4089-recursive-this-deoptimization branch May 25, 2021 10:51
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Successfully merging this pull request may close these issues.

Out of Memory in deoptimizeThisOnEventAtPath since rollup 2.49.0
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