icsx5 not able to parse iCalender with GEO property

[WeisSeb]

When trying to import a iCalendar that contains GEO properties either through a WebCal link or manually as a .ics file icsx5 fails with an error message. If I remove the GEO properties from the .ics file the calendar is read successfully. The .ics file with GEO properties can be read without issues by Nextcloud and my calendar app (aCalendar).
The issue started a few days ago

error message:

Couldn't parse iCalendar

at.bitfire.ical4android.InvalidCalendarException: Couldn't parse iCalendar
	at at.bitfire.ical4android.ICalendar$Companion.fromReader(ICalendar.kt:81)
	at at.bitfire.ical4android.Event$Companion.eventsFromReader(Event.kt:81)
	at at.bitfire.icsdroid.ui.AddCalendarValidationFragment$ValidationModel$initialize$downloader$1.onSuccess(AddCalendarValidationFragment.kt:115)
	at at.bitfire.icsdroid.CalendarFetcher.fetchLocal$icsx5_62_2_0_2_standardRelease(CalendarFetcher.kt:114)
	at at.bitfire.icsdroid.CalendarFetcher.run(CalendarFetcher.kt:48)
	at java.lang.Thread.run(Thread.java:920)
Caused by: net.fortuna.ical4j.data.ParserException: Error at line 21:null
	at net.fortuna.ical4j.data.CalendarParserImpl.parse(CalendarParserImpl.java:172)
	at net.fortuna.ical4j.data.CalendarBuilder.build(CalendarBuilder.java:197)
	at net.fortuna.ical4j.data.CalendarBuilder.build(CalendarBuilder.java:185)
	at at.bitfire.ical4android.ICalendar$Companion.fromReader(ICalendar.kt:79)
	... 5 more
Caused by: java.lang.NumberFormatException
	at java.math.BigDecimal.<init>(BigDecimal.java:497)
	at java.math.BigDecimal.<init>(BigDecimal.java:383)
	at java.math.BigDecimal.<init>(BigDecimal.java:809)
	at net.fortuna.ical4j.model.property.Geo.setValue(Geo.java:212)
	at net.fortuna.ical4j.model.property.Geo.<init>(Geo.java:166)
	at net.fortuna.ical4j.model.property.Geo$Factory.createProperty(Geo.java:258)
	at net.fortuna.ical4j.model.PropertyBuilder.build(PropertyBuilder.java:76)
	at net.fortuna.ical4j.data.DefaultContentHandler.endProperty(DefaultContentHandler.java:159)
	at net.fortuna.ical4j.data.CalendarParserImpl$PropertyParser.parse(CalendarParserImpl.java:309)
	at net.fortuna.ical4j.data.CalendarParserImpl$PropertyParser.access$1100(CalendarParserImpl.java:241)
	at net.fortuna.ical4j.data.CalendarParserImpl$PropertyListParser.parse(CalendarParserImpl.java:226)
	at net.fortuna.ical4j.data.CalendarParserImpl$ComponentParser.parse(CalendarParserImpl.java:446)
	at net.fortuna.ical4j.data.CalendarParserImpl$ComponentParser.access$900(CalendarParserImpl.java:422)
	at net.fortuna.ical4j.data.CalendarParserImpl$PropertyListParser.parse(CalendarParserImpl.java:224)
	at net.fortuna.ical4j.data.CalendarParserImpl.parseCalendar(CalendarParserImpl.java:128)
	at net.fortuna.ical4j.data.CalendarParserImpl.parseCalendarList(CalendarParserImpl.java:194)
	at net.fortuna.ical4j.data.CalendarParserImpl.parse(CalendarParserImpl.java:163)
	... 8 more

.ics File:

BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:-//valid-url.de//NONSGML Valid-URL//EN
X-LOTUS-CHARSET:UTF-8
X-WR-TIMEZONE:Europe/Berlin
X-WR-CALNAME:Calname
X-WR-CALDESC:Caldesc
BEGIN:VEVENT
UID:[email protected]
CATEGORIES:categorie
TRANSP:OPAQUE
CLASS:PUBLIC
SEQUENCE:0
DTSTAMP:20220725T132826Z
DTSTART:20220904T050000Z
DTEND:20220904T160000Z
SUMMARY:XXXXX
LOCATION:XXXX, YYY 1/1
 \, ZZZZZ\, 12345 City
GEO:12.345\;5.678
ORGANIZER:mailto:[email protected]
DESCRIPTION:Description
X-URL;VALUE="URI":https://url.link/12345/xxx/12345
URL:https://url.link/12345/xxx/12345
END:VEVENT
END:VCALENDAR

[WeisSeb]

After looking into it a bit more: icsx5 is behaving correctly here. As defined by the standard, latitude and longitude should be separated by a simple semicolon while the included .ics file is using an escaped semicolon. After changing the escaped semicolon to a normal semicolon icsx5 is able to successfully read the .ics file