Error if file with infinity sign

[anonymous]

What steps will reproduce the problem?

1. Create a file with the infinity sign (∞) such as a Youtube video download of this album: ​https://en.wikipedia.org/wiki/F%E2%99%AF_A%E2%99%AF_%E2%88%9E
2. in JOSM, open an "Open a file" dialog box directing to the directory containing to such file
3. Error

What is the expected result?

JOSM opens the directory and shows the file containing the infinity sign.

What happens instead?

Error dialog

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

Obviously, not a major issue as I don't think the infinity sign is often used in file names, but I thought it'd be worth reporting anyway.

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2021-06-02 22:03:39 +0200 (Wed, 02 Jun 2021)
Revision:17919
Build-Date:2021-06-02 20:11:30
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (17919 en) Linux Ubuntu 20.04.2 LTS
Memory Usage: 469 MB / 3980 MB (321 MB allocated, but free)
Java version: 11.0.11+9-Ubuntu-0ubuntu2.20.04, Ubuntu, OpenJDK 64-Bit Server VM
Look and Feel: javax.swing.plaf.metal.MetalLookAndFeel
Screen: :0.0 3840×2160 (scaling 2.00×2.00)
Maximum Screen Size: 3840×2160
Best cursor sizes: 16×16→16×16, 32×32→32×32
Environment variable LANG: en_NL.UTF-8
System property file.encoding: ANSI_X3.4-1968
System property sun.jnu.encoding: ANSI_X3.4-1968
Locale info: en_US
Numbers with default locale: 1234567890 -> 1234567890
Desktop environment: KDE
Java package: openjdk-11-jre:amd64-11.0.11+9-0ubuntu2~20.04
Java ATK Wrapper package: libatk-wrapper-java:all-0.37.1-1
fonts-noto: fonts-noto:all-20200323-1build1~ubuntu20.04.1
VM arguments: [-Djosm.restart=true, -Djava.net.useSystemProxies=true]

Plugins:
+ OpeningHoursEditor (35640)
+ utilsplugin2 (35691)
+ wikipedia (1.1.4)

Last errors/warnings:
- 00011.676 E: Handled by bug report queue: java.nio.file.InvalidPathException: Malformed input or input contains unmappable characters: ${HOME}/Godspeed You! Black Emperor - F# A# ��� (Full Album) [1080p]-wy4IsC5eb7o.mkv
- 00011.686 E: Handled by bug report queue: java.nio.file.InvalidPathException: Malformed input or input contains unmappable characters: ${HOME}/Godspeed You! Black Emperor - F# A# ��� (Full Album) [1080p]-wy4IsC5eb7o.mkv
- 00011.701 E: Handled by bug report queue: java.nio.file.InvalidPathException: Malformed input or input contains unmappable characters: ${HOME}/Godspeed You! Black Emperor - F# A# ��� (Full Album) [1080p]-wy4IsC5eb7o.mkv



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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: Basic L&F File Loading Thread (48)
java.nio.file.InvalidPathException: Malformed input or input contains unmappable characters: /home/(myusername)/Godspeed You! Black Emperor - F# A# ��� (Full Album) [1080p]-wy4IsC5eb7o.mkv
	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:279)
	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$FilesLoader.run0(BasicDirectoryModel.java:300)
	at java.desktop/javax.swing.plaf.basic.BasicDirectoryModel$FilesLoader.run(BasicDirectoryModel.java:289)
	at java.base/java.lang.Thread.run(Thread.java:829)

[skyper]

Closed as duplicate of #14596.
Replying to anonymous:

System property file.encoding: ANSI_X3.4-1968
System property sun.jnu.encoding: ANSI_X3.4-1968

Please, setup your system to properly support UTF-8 characters