D16748.id40338.diff
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D16748.id40338.diff
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	diff --git a/src/parser/calendar/data/PhutilCalendarRecurrenceRule.php b/src/parser/calendar/data/PhutilCalendarRecurrenceRule.php
	--- a/src/parser/calendar/data/PhutilCalendarRecurrenceRule.php
	+++ b/src/parser/calendar/data/PhutilCalendarRecurrenceRule.php
	@@ -267,7 +267,26 @@
	'BYSETPOS',
	));

	+ $int_values = array_fuse(
	+ array(
	+ 'COUNT',
	+ 'INTERVAL',
	+ ));
	+
	foreach ($dict as $key => $value) {
	+ if (isset($int_values[$key])) {
	+ // None of these values may be negative.
	+ if (!preg_match('/^\d+\z/', $value)) {
	+ throw new Exception(
	+ pht(
	+ 'Unexpected value "%s" in "%s" RULE property: expected an '.
	+ 'integer.',
	+ $value,
	+ $key));
	+ }
	+ $dict[$key] = (int)$value;
	+ }
	+
	if (isset($int_lists[$key])) {
	foreach ($value as $k => $v) {
	if (!preg_match('/^-?\d+\z/', $v)) {