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LibJS: Fix off-by-one in make_day()'s temporary Core::DateTime
Just like in the previous commit, the day value of Core::DateTime is one-based, not zero based. Noticed while implementing a new Temporal function, this likely would've been caught earlier if we'd also use it for the Date API (we don't).
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@ -341,7 +341,7 @@ Value make_day(GlobalObject& global_object, Value year, Value month, Value date)
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// 8. Find a finite time value t such that YearFromTime(t) is ym and MonthFromTime(t) is mn and DateFromTime(t) is 1𝔽; but if this is not possible (because some argument is out of range), return NaN.
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if (!AK::is_within_range<int>(y) || !AK::is_within_range<int>(m + 1))
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return js_nan();
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auto t = Core::DateTime::create(static_cast<int>(y), static_cast<int>(m + 1), 0).timestamp() * 1000;
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auto t = Core::DateTime::create(static_cast<int>(y), static_cast<int>(m + 1), 1).timestamp() * 1000;
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// 9. Return Day(t) + dt - 1𝔽.
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return Value(day(static_cast<double>(t)) + dt - 1);
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}
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