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Temporal: Add regression tests for Firefox crash#5043

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ptomato:firefox-2036259
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Temporal: Add regression tests for Firefox crash#5043
ptomato wants to merge 1 commit into
tc39:mainfrom
ptomato:firefox-2036259

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@ptomato ptomato commented May 6, 2026

Firefox fuzzing found a crash when rounding durations relative to dates near the early limit, with roundingMode expand:
https://bugzilla.mozilla.org/show_bug.cgi?id=2036259

This was an implementation bug, but it wasn't triggered by any existing test262 test, so we should have coverage for it.

LLM disclosure: I used a bot to make a first draft of these, then hand-edited them until I was satisfied.

Firefox fuzzing found a crash when rounding durations relative to dates
near the early limit, with roundingMode expand:
https://bugzilla.mozilla.org/show_bug.cgi?id=2036259

This was an implementation bug, but it wasn't triggered by any existing
test262 test, so we should have coverage for it.

LLM disclosure: I used a bot to make a first draft of these, then
hand-edited them until I was satisfied.
@ptomato ptomato requested a review from a team as a code owner May 6, 2026 17:45
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