id summary reporter owner description type status priority milestone component version resolution keywords cc 16875 Crash after using fix duplicated nodes + multiple undo GerdP Don-vip "==== What steps will reproduce the problem? 1. Start new Data Layer 2. Draw a rectangular closed Way and tag it building=yes 3. Press Ctrl+C to copy 4. Press Ctrl+Alt+V (paste at source position) 5. Press Esc 6. Run Validator, this should report 4 errors: Building duplicated nodes (4) 7. Click on Fix 8. Press Ctrl+Z several times until this crash happens ==== What is the expected result? No crash, an empty data layer ==== What happens instead? Part of a way is still existing ==== Please provide any additional information below. Attach a screenshot if possible. I've noticed similar crashes and incomplete undo actions while editing real data, now I was able to reproduce it with this rather simple set of actions. {{{ URL:https://josm.openstreetmap.de/svn/trunk Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b Last:Changed Date: 2018-10-01 23:59:36 +0200 (Mon, 01 Oct 2018) Build-Date:2018-10-01 22:08:47 Revision:14289 Relative:URL: ^/trunk Identification: JOSM/1.5 (14289 en) Windows 10 64-Bit OS Build number: Windows 10 Home 1803 (17134) Memory Usage: 2187 MB / 5461 MB (1666 MB allocated, but free) Java version: 1.8.0_191-b12, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM Screen: \Display0 1920x1080 Maximum Screen Size: 1920x1080 Dataset consistency test: No problems found Plugins: + OpeningHoursEditor (34535) + apache-commons (34506) + buildings_tools (34572) + download_along (34503) + ejml (34389) + geotools (34513) + jts (34524) + measurement (34529) + merge-overlap (34664) + o5m (34405) + opendata (34675) + pbf (34576) + poly (34546) + reverter (34552) + undelete (34568) + utilsplugin2 (34506) Last errors/warnings: - W: java.io.IOException: Attribution is not loaded yet - W: java.io.IOException: Attribution is not loaded yet - E: org.openstreetmap.josm.io.OsmApiException: ResponseCode=400, Error Header= - E: Bad Request - The OSM server 'api.openstreetmap.org' reported a bad request.

The area you tried to download is too big or your request was too large.
Either request a smaller area or use an export file provided by the OSM community. - E: org.openstreetmap.josm.io.OsmApiException: ResponseCode=400, Error Header= - E: Bad Request - The OSM server 'api.openstreetmap.org' reported a bad request.

The area you tried to download is too big or your request was too large.
Either request a smaller area or use an export file provided by the OSM community. - E: Handled by bug report queue: java.lang.ArrayIndexOutOfBoundsException: -1 - E: Handled by bug report queue: java.lang.ArrayIndexOutOfBoundsException - E: Handled by bug report queue: java.lang.ArrayIndexOutOfBoundsException - E: Handled by bug report queue: java.lang.ArrayIndexOutOfBoundsException === REPORTED CRASH DATA === BugReportExceptionHandler#handleException: No data collected. Warning issued by: BugReportExceptionHandler#handleException === STACK TRACE === Thread: AWT-EventQueue-0 (17) of main java.lang.ArrayIndexOutOfBoundsException }}} " defect closed major 18.10 Core fixed template_report undo regression command stack