Silent crash on downloading parent ways and relations

[contrapunctus]

What steps will reproduce the problem?

1. Download "(type:relation and type=route and route=bus) in Delhi"
2. Select all relations
3. Download parent ways/relations

What happens instead?

After some progress, JOSM dies without any dialogs.

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: 2018-01-28 23:08:56 +0100 (Sun, 28 Jan 2018)
Build-Date:2018-01-28 22:25:44
Revision:13367
Relative:URL: ^/trunk

Identification: JOSM/1.5 (13367 en) Linux Debian GNU/Linux 9.3 (stretch)
Memory Usage: 355 MB / 866 MB (96 MB allocated, but free)
Java version: 1.8.0_151-8u151-b12-1~deb9u1-b12, Oracle Corporation, OpenJDK Server VM
Screen: :0.0 1366x768
Maximum Screen Size: 1366x768
Java package: openjdk-8-jre:i386-8u151-b12-1~deb9u1
Java ATK Wrapper package: libatk-wrapper-java:all-0.33.3-13

Plugins:
+ continuosDownload (68)
+ download_along (33710)
+ pt_assistant (33860)
+ public_transport (33817)

Last errors/warnings:
- W: No configuration settings found.  Using hardcoded default values for all pools.
- W: Region [TMS_BLOCK_v2] Resetting cache

[Don-vip]

Please attach the console output.