Bug when trying to save

[fabien,gabriel@…]

What steps will reproduce the problem?

1. Using Ubuntu 18.04 in Frensh
2. "Save in"

What is the expected result?

See the content of the home folder

What happens instead?

Content of the folder unreadable
Could be due to special character "é" in some folder names

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

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2018-11-28 01:09:01 +0100 (Wed, 28 Nov 2018)
Revision:14460
Build-Date:2018-11-28 00:26:41
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (14460 en) Linux Freedesktop.org 18.08 (Flatpak runtime)
Memory Usage: 238 MB / 1972 MB (67 MB allocated, but free)
Java version: 11.0.1+13, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1920x1080
Maximum Screen Size: 1920x1080
Dataset consistency test: No problems found

Last errors/warnings:
- W: Region [TMS_BLOCK_v2] Resetting cache
- E: org.openstreetmap.josm.io.OsmApiException: ResponseCode=400, Error Header=<You requested too many nodes (limit is 50000). Either request a smaller area, or use planet.osm>
- E: Bad Request - org.openstreetmap.josm.gui.widgets.HtmlPanel[,0,0,0x0,invalid,layout=java.awt.BorderLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=9,maximumSize=,minimumSize=,preferredSize=]
- E: org.openstreetmap.josm.io.OsmApiException: ResponseCode=400, Error Header=<You requested too many nodes (limit is 50000). Either request a smaller area, or use planet.osm>
- E: Bad Request - org.openstreetmap.josm.gui.widgets.HtmlPanel[,0,0,0x0,invalid,layout=java.awt.BorderLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=9,maximumSize=,minimumSize=,preferredSize=]
- E: Handled by bug report queue: java.nio.file.InvalidPathException: Malformed input or input contains unmappable characters: ${HOME}/T��l��chargements
- E: Handled by bug report queue: java.nio.file.InvalidPathException: Malformed input or input contains unmappable characters: ${HOME}/T��l��chargements
- E: Handled by bug report queue: java.nio.file.InvalidPathException: Malformed input or input contains unmappable characters: ${HOME}/T��l��chargements
- E: Handled by bug report queue: java.nio.file.InvalidPathException: Malformed input or input contains unmappable characters: ${HOME}/T��l��chargements
- E: Handled by bug report queue: java.nio.file.InvalidPathException: Malformed input or input contains unmappable characters: ${HOME}/T��l��chargements


=== REPORTED CRASH DATA ===
BugReportExceptionHandler#handleException:
No data collected.

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: Basic L&F File Loading Thread (185)
java.nio.file.InvalidPathException: Malformed input or input contains unmappable characters: /home/fabien/T��l��chargements
	at java.base/sun.nio.fs.UnixPath.encode(UnixPath.java:145)
	at java.base/sun.nio.fs.UnixPath.<init>(UnixPath.java:69)
	at java.base/sun.nio.fs.UnixFileSystem.getPath(UnixFileSystem.java:280)
	at java.base/java.nio.file.Path.of(Path.java:147)
	at java.base/java.nio.file.Paths.get(Paths.java:69)
	at java.desktop/sun.awt.shell.ShellFolder.getShellFolder(ShellFolder.java:247)
	at java.desktop/javax.swing.filechooser.FileSystemView.getFiles(FileSystemView.java:523)
	at java.desktop/javax.swing.plaf.basic.BasicDirectoryModel$FilesLoader.run0(BasicDirectoryModel.java:290)
	at java.desktop/javax.swing.plaf.basic.BasicDirectoryModel$FilesLoader.run(BasicDirectoryModel.java:279)
	at java.base/java.lang.Thread.run(Thread.java:834)

[Don-vip]

Closed as duplicate of #14596.
Your locale configuration is wrong, see #14596 comments to fix it.