Can't open geojson created by JOSM itself

[naoliv]

I am reporting this against Plugin geojson, but I am unsure if it's not actually a problem in JOSM.
Open the attached example.osm file and then save it as a GeoJSON file.
Try to open that GeoJSON file:

2017-04-18 09:31:05.472 INFORMAÇÕES: Open file: /tmp/har/example.geojson (9813454 bytes)
2017-04-18 09:31:05.472 INFORMAÇÕES: Parsing GeoJSON: /tmp/har/example.geojson
2017-04-18 09:31:05.571 GRAVE: Error while reading json file!
2017-04-18 09:31:05.571 GRAVE: com.fasterxml.jackson.databind.JsonMappingException: Unexpected token (END_OBJECT), expected FIELD_NAME: missing property 'type' that is to contain type id  (for class org.geojson.GeoJsonObject)
 at [Source: /tmp/har/example.geojson; line: 253915, column: 13] (through reference chain: org.geojson.FeatureCollection["features"]->java.util.ArrayList[589]->org.geojson.Feature["geometry"])
com.fasterxml.jackson.databind.JsonMappingException: Unexpected token (END_OBJECT), expected FIELD_NAME: missing property 'type' that is to contain type id  (for class org.geojson.GeoJsonObject)
 at [Source: /tmp/har/example.geojson; line: 253915, column: 13] (through reference chain: org.geojson.FeatureCollection["features"]->java.util.ArrayList[589]->org.geojson.Feature["geometry"])
	at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:255)
	at com.fasterxml.jackson.databind.DeserializationContext.wrongTokenException(DeserializationContext.java:1061)
	at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer._deserializeTypedUsingDefaultImpl(AsPropertyTypeDeserializer.java:147)
	at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer.deserializeTypedFromObject(AsPropertyTypeDeserializer.java:99)
	at com.fasterxml.jackson.databind.deser.AbstractDeserializer.deserializeWithType(AbstractDeserializer.java:142)
	at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:488)
	at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:95)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:260)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:163)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:135)
	at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer._deserializeTypedForId(AsPropertyTypeDeserializer.java:120)
	at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer.deserializeTypedFromObject(AsPropertyTypeDeserializer.java:91)
	at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeWithType(BeanDeserializerBase.java:1017)
	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:279)
	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:249)
	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:26)
	at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:490)
	at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:95)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:260)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:163)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:135)
	at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer._deserializeTypedForId(AsPropertyTypeDeserializer.java:120)
	at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer.deserializeTypedFromObject(AsPropertyTypeDeserializer.java:91)
	at com.fasterxml.jackson.databind.deser.AbstractDeserializer.deserializeWithType(AbstractDeserializer.java:142)
	at com.fasterxml.jackson.databind.deser.impl.TypeWrappedDeserializer.deserialize(TypeWrappedDeserializer.java:42)
	at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3807)
	at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2691)
	at org.openstreetmap.josm.plugins.geojson.GeoJsonFileImporter.importData(GeoJsonFileImporter.java:39)
	at org.openstreetmap.josm.io.FileImporter.importDataHandleExceptions(FileImporter.java:91)
	at org.openstreetmap.josm.actions.OpenFileAction$OpenFileTask.importData(OpenFileAction.java:350)
	at org.openstreetmap.josm.actions.OpenFileAction$OpenFileTask.realRun(OpenFileAction.java:303)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:95)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:143)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

QGIS seems to properly read the GeoJSON file however.

JOSM:

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-04-17 23:55:53 +0200 (Mon, 17 Apr 2017)
Build-Date:2017-04-18 01:33:31
Revision:11950
Relative:URL: ^/trunk

Identification: JOSM/1.5 (11950 pt_BR) Linux Debian GNU/Linux 9.0 (stretch)
Memory Usage: 475 MB / 10206 MB (208 MB allocated, but free)
Java version: 1.8.0_121-8u121-b13-4-b13, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1600x900, :0.1 1280x1024
Maximum Screen Size: 1600x1024
Java package: openjdk-8-jre:amd64-8u121-b13-4
Java ATK Wrapper package: libatk-wrapper-java:all-0.33.3-13
VM arguments: [-Dawt.useSystemAAFontSettings=on]
Dataset consistency test: No problems found

Plugins:
+ Create_grid_of_ways (32699)
+ FastDraw (33182)
+ ImportImagePlugin (33028)
+ OpeningHoursEditor (33185)
+ PicLayer (33148)
+ RoadSigns (33204)
+ SimplifyArea (33004)
+ apache-commons (32994)
+ buildings_tools (33004)
+ conflation (0.5.4)
+ contourmerge (1030)
+ download_along (32946)
+ editgpx (33004)
+ ejml (32680)
+ geojson (52)
+ geotools (33042)
+ importvec (33088)
+ indoorhelper (33088)
+ jts (32699)
+ log4j (32699)
+ measurement (33088)
+ merge-overlap (33154)
+ opendata (33245)
+ pbf (33241)
+ pdfimport (33004)
+ poly (33004)
+ reverter (33088)
+ scripting (30764)
+ tageditor (33021)
+ todo (30100)
+ turnlanes (33088)
+ turnlanes-tagging (254)
+ turnrestrictions (33088)
+ undelete (33263)
+ utilsplugin2 (33212)

[Klumbumbus]

Closed as duplicate of #10564.