cplusplus / cplusplus/draft

[csetjmp.syn] CWG2361, LWG3652: Imprecise description of UB

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cwg not-editorial
Dominant language
TeX
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Merged PRs (30d)
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Description

A setjmp/longjmp call pair has undefined behavior if replacing the setjmp and longjmp by catch
and throw would invoke any non-trivial destructors for any automatic objects.

It's unclear what does the document mean by "replacing". Could be something like "if ... skips stack unwinding ..."

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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 [csetjmp.syn] wording quoted in the issue and review the surrounding description of setjmp/longjmp undefined behavior. Determine what “replacing” is intended to mean, then revise the wording so the stack-unwinding condition is precise and check the surrounding draft text for consistency.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp, tex
Domain
documentation
Issue type
Documentation
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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