result.[[Calendar]] is always undefined in step 3-g of ToTemporalZonedDateTime

[FrankYFTang]

6.5.2 ToTemporalZonedDateTime ( item [ , options ] )
https://tc39.es/proposal-temporal/#sec-temporal-totemporalzoneddatetime

c. Let result be ? ParseTemporalZonedDateTimeString(string).
...
g. Let calendar be ? ToTemporalCalendarWithISODefault(result.[[Calendar]]).

but if we read ParseTemporalZonedDateTimeString in
13.36 ParseTemporalZonedDateTimeString ( isoString )
https://tc39.es/proposal-temporal/#sec-temporal-parsetemporalzoneddatetimestring

the return value does not include [[Calendar]]

6. Return the new Record { [[Year]]: result.[[Year]], [[Month]]: result.[[Month]], [[Day]]: result.[[Day]], [[Hour]]: result.[[Hour]], [[Minute]]: result.[[Minute]], [[Second]]: result.[[Second]], [[Millisecond]]: result.[[Millisecond]], [[Microsecond]]: result.[[Microsecond]], [[Nanosecond]]: result.[[Nanosecond]], [[TimeZoneOffsetString]]: timeZoneResult.[[OffsetString]], [[TimeZoneName]]: timeZoneResult.[[Name]] }.

so result.[[Calendar]] will always be undefined in step 3g of ToTemporalZonedDateTime

[FrankYFTang]

@ljharb @ptomato @justingrant @Ms2ger @littledan @ryzokuken

[FrankYFTang]

see #1823 for solution of this issue.

[ptomato]

Fixed by #1823