Minecraft Launcher returns garbled error message, when pointing java executable to non-existing file/directory.

The Bug:

Minecraft Launcher returns garbled error details message, when pointing java executable to non-existing file/directory.

Steps to Reproduce:

1. Open Minecraft Launcher;
2. Go to Installations;
3. Click New installation;
4. Press More options;
5. In Java executable field write any non-existing file/directory (existing directory can be used too);
6. Create a new installation;
7. Return to Play menu;
8. Select your new created installation;
9. Press Play button;
10. Bug successfully recreated.

Observed Behavior:

Minecraft Launcher returns Launching the game failed! error with garbled details: ί尠������󱯥��砢尸孠.

Expected Behavior:

Minecraft Launcher returns an error with readable details.