Tried to import a defective geojson and JOSM crashed

[anonymous]

What steps will reproduce the problem?

Open this geojson:

    "type": "Feature",
    "geometry": {
        "type": "Polygon",
        "coordinates": [
            [
                16.22406,
                44.3489
            ],
            [
                16.19797,
                44.272
            ],
            [
                16.30577,
                44.15084
            ]
        ]
    }
}}}}


==== What is the expected result?

==== What happens instead?

==== Please provide any additional information below. Attach a screenshot if possible.

{{{
URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2021-04-27 20:35:33 +0200 (Tue, 27 Apr 2021)
Build-Date:2021-04-27 21:58:39
Revision:17833
Relative:URL: ^/trunk

Identification: JOSM/1.5 (17833 en_GB) Windows 10 64-Bit
OS Build number: Windows 10 Pro 2009 (19042)
Memory Usage: 1071 MB / 1820 MB (762 MB allocated, but free)
Java version: 1.8.0_281-b09, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920×1080 (scaling 1.00×1.00) \Display1 1920×1080 (scaling 1.00×1.00)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→32×32, 32×32→32×32
System property file.encoding: Cp1250
System property sun.jnu.encoding: Cp1250
Locale info: en_GB
Numbers with default locale: 1234567890 -> 1234567890

Plugins:
+ ImportImagePlugin (35567)
+ apache-commons (35524)
+ ejml (35458)
+ geotools (35458)
+ imagery_offset_db (35640)
+ jts (35458)
+ log4j (35458)
+ measurement (35640)
+ pt_assistant (2.1.10-80-g7d9bba3)
+ reverter (35732)
+ tageditor (35640)
+ turnlanes (35640)
+ turnlanes-tagging (288)
+ turnrestrictions (35640)
+ utilsplugin2 (35691)

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransport&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1

Last errors/warnings:
- 00063.003 W: Unable to find supported projection for layer dgu 2019_2020. Using EPSG:3857.
- 00063.005 W: Unable to find supported projection for layer dgu 2019_2020. Using EPSG:3857.
- 00425.274 E: Error while reading json file!
- 00425.275 E: org.openstreetmap.josm.io.IllegalDataException: javax.json.stream.JsonParsingException: Invalid token=SQUARECLOSE at (line no=1011, column no=9, offset=20758). Expected tokens are: [COMMA]. Cause: javax.json.stream.JsonParsingException: Invalid token=SQUARECLOSE at (line no=1011, column no=9, offset=20758). Expected tokens are: [COMMA]
- 00510.716 E: Error while reading json file!
- 00510.716 E: org.openstreetmap.josm.io.IllegalDataException: javax.json.stream.JsonParsingException: Invalid token=SQUARECLOSE at (line no=1011, column no=9, offset=20758). Expected tokens are: [COMMA]. Cause: javax.json.stream.JsonParsingException: Invalid token=SQUARECLOSE at (line no=1011, column no=9, offset=20758). Expected tokens are: [COMMA]
- 00650.143 E: Error while reading json file!
- 00650.144 E: org.openstreetmap.josm.io.IllegalDataException: javax.json.stream.JsonParsingException: Invalid token=SQUARECLOSE at (line no=1011, column no=9, offset=20758). Expected tokens are: [COMMA]. Cause: javax.json.stream.JsonParsingException: Invalid token=SQUARECLOSE at (line no=1011, column no=9, offset=20758). Expected tokens are: [COMMA]
- 00792.842 E: Handled by bug report queue: java.lang.ClassCastException: Cannot cast org.glassfish.json.JsonNumberImpl$JsonBigDecimalNumber to javax.json.JsonArray



=== REPORTED CRASH DATA ===
BugReportExceptionHandler#handleException:
No data collected.

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: main-worker-0 (19) of main
java.lang.ClassCastException: Cannot cast org.glassfish.json.JsonNumberImpl$JsonBigDecimalNumber to javax.json.JsonArray
	at java.lang.Class.cast(Unknown Source)
	at javax.json.JsonValue.asJsonArray(JsonValue.java:153)
	at org.openstreetmap.josm.io.GeoJSONReader.lambda$createWay$5(GeoJSONReader.java:296)
	at java.util.stream.ReferencePipeline$3$1.accept(Unknown Source)
	at java.util.Iterator.forEachRemaining(Unknown Source)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source)
	at java.util.stream.AbstractPipeline.copyInto(Unknown Source)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source)
	at java.util.stream.AbstractPipeline.evaluate(Unknown Source)
	at java.util.stream.ReferencePipeline.collect(Unknown Source)
	at org.openstreetmap.josm.io.GeoJSONReader.createWay(GeoJSONReader.java:297)
	at org.openstreetmap.josm.io.GeoJSONReader.parsePolygon(GeoJSONReader.java:259)
	at org.openstreetmap.josm.io.GeoJSONReader.parseGeometry(GeoJSONReader.java:199)
	at org.openstreetmap.josm.io.GeoJSONReader.parseFeature(GeoJSONReader.java:147)
	at org.openstreetmap.josm.io.GeoJSONReader.parseRoot(GeoJSONReader.java:93)
	at org.openstreetmap.josm.io.GeoJSONReader.parse(GeoJSONReader.java:77)
	at org.openstreetmap.josm.io.GeoJSONReader.doParseDataSet(GeoJSONReader.java:411)
	at org.openstreetmap.josm.io.GeoJSONReader.parseDataSet(GeoJSONReader.java:476)
	at org.openstreetmap.josm.gui.io.importexport.GeoJSONImporter.importData(GeoJSONImporter.java:51)
	at org.openstreetmap.josm.gui.io.importexport.FileImporter.importDataHandleExceptions(FileImporter.java:103)
	at org.openstreetmap.josm.actions.OpenFileAction$OpenFileTask.importData(OpenFileAction.java:417)
	at org.openstreetmap.josm.actions.OpenFileAction$OpenFileTask.realRun(OpenFileAction.java:366)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:94)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:142)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
}}}