Changeset upload fails silently

[tuxayo]

What steps will reproduce the problem?

1. Edit something
2. Try to upload the changes

What is the expected result?

The changeset upload dialog closes.
The upload pop up appears and disappears when upload is done.

What happens instead?

The changeset upload dialog closes.
Upload pop up doen't appear and data is not uploaded so I can try again to upload it but with no result.

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

Same thing happened with download but only once and after restarting JOSM it stopped happening.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2015-02-01 02:33:54
Last Changed Author: Don-vip
Revision: 7995
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Relative URL: ^/trunk
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2015-01-31 15:17:59 +0100 (Sat, 31 Jan 2015)
Last Changed Rev: 7995

Identification: JOSM/1.5 (7995 fr) Linux Arch Linux
Memory Usage: 515 MB / 1328 MB (254 MB allocated, but free)
Java version: 1.7.0_75, Oracle Corporation, OpenJDK 64-Bit Server VM
VM arguments: [-Djosm.restart=true]
Dataset consistency test: No problems found

Plugins:
- buildings_tools (30955)
- cadastre-fr (30892)
- download_along (30892)
- geochat (30892)
- geotools (31000)
- jts (31002)
- measurement (30892)
- waydownloader (30892)

Last errors/warnings:
- W: java.net.ConnectException while connecting to a chat server: Connexion terminée par expiration du délai d'attente

[tuxayo]

The bug is not happening anymore even if I haven't updated JOSM.
I think the ticket can be closed now that I can't even reproduce the problem.