Bug 1903963 - Part 2: Add missing valid date-time check to AddDate. r…

…=spidermonkey-reviewers,dminor

tc39/proposal-temporal#2891

Depends on D214499

Differential Revision: https://phabricator.services.mozilla.com/D214500

UltraBlame original commit: 19219cc6f22aa322d6eda61a7400ac80e2fbbe7b

js/src/builtin/temporal/PlainDate.cpp

@@ -5631,6 +5631,39 @@ balanced
 )
 )
 ;
+/
+/
+Directly
+validate
+the
+result
+is
+within
+the
+valid
+limits
+.
+if
+(
+!
+ISODateTimeWithinLimits
+(
+balanced
+)
+)
+{
+JS_ReportErrorNumberASCII
+(
+cx
+GetErrorMessage
+nullptr
+JSMSG_TEMPORAL_PLAIN_DATE_INVALID
+)
+;
+return
+false
+;
+}
 *
 result
 =