I can reproduce the crash reliably in less than 1 minute by simply repeatedly drawing rectangles on the empty black background (using JOSM plugin https://wiki.openstreetmap.org/wiki/JOSM/Plugins/BuildingsTools) in JOSM.
I can reproduce the crash reliably in less than 1 minute by simply repeatedly drawing rectangles on the empty black background (using JOSM plugin https:/ /wiki.openstree tmap.org/ wiki/JOSM/ Plugins/ BuildingsTools) in JOSM.