id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
14528	[Regression] Joining two closed ways results in a mess instead of one merged way	eladner	team	"==== What steps will reproduce the problem?
1. create two closed overlapping ways.
2. Merge them with Tools -> Join Overlapping Areas
3. Observe the chaos left behind.

==== What is the expected result?
multiple ways should be merged into one

==== What happens instead?
Any interior areas are not removed as before, but are converted into inner ways and a multipolygon relationship is created where what should be the final outer way is the outer way and the part that should have been discarded is kept as a separate inner way.

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

{{{
URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-03-14 19:27:54 +0100 (Tue, 14 Mar 2017)
Build-Date:2017-03-15 02:34:28
Revision:11732
Relative:URL: ^/trunk

Identification: JOSM/1.5 (11732 en) Linux Ubuntu 16.04.2 LTS
Memory Usage: 739 MB / 7282 MB (407 MB allocated, but free)
Java version: 1.8.0_121-b13, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: :0.0 1920x1080
Maximum Screen Size: 1920x1080
Dataset consistency test: No problems found

Plugins:
+ AddrInterpolation (33160)
+ CommandLine (33182)
+ Create_grid_of_ways (32699)
+ FastDraw (33182)
+ FixAddresses (33182)
+ OpeningHoursEditor (33185)
+ PicLayer (33148)
+ SimplifyArea (33004)
+ alignways (33182)
+ apache-commons (32994)
+ buildings_tools (33004)
+ dataimport (33024)
+ download_along (32946)
+ ejml (32680)
+ ext_tools (33004)
+ geotools (33042)
+ gpsblam (33004)
+ importvec (33088)
+ jts (32699)
+ log4j (32699)
+ merge-overlap (33154)
+ opendata (33156)
+ reltoolbox (33088)
+ reverter (33088)
+ splinex (33160)
+ turnrestrictions (33088)
+ utilsplugin2 (33182)
+ waydownloader (33167)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/OneClick&zip=1

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/LessObtrusiveNodes&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Fixme&style&zip=1

Last errors/warnings:
- E: org.openstreetmap.josm.plugins.PluginListParseException: Failed to create plugin information from manifest for plugin 'mbtiles.jar'. Cause: org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin mbtiles. Cause: java.io.IOException: invalid manifest format
}}}
"	defect	closed	major		Core		irreproducible	template_report regression	michael2402