Launcher crash caused by non-headless JRE installation outputs user-unfriendly error message

Moderator Note

Headless installations of java are not supported for running the client. Ensure that you are using your distributions full installation of the OpenJDK 8 Java Runtime Environment

You can check to see if you have a headless installation of java on debian based distro's using:

dpkg -l | grep openjdk

If the output only contains the word openjdk-8-jre-headless and does not contain openjdk-8-jre then you will need to install the full JRE, normally:

sudo apt-get install openjdk-8-jre

If you are not on a Debian based distribution, please refer to your distributions documentation for checking what Java package you have installed

SOLVED, I had to comment out a line referring to the accessibility tools.

When i try to launch versions under 1.13, the launcher crashes after a few seconds.

I believe this is the error part:

[0731/141211:WARNING:x11_util.cc(1404)] X error received: serial 915, error_code 182 (GLXBadWindow), request_code 155, minor_code 32 (X_GLXDestroyWindow)
[0731/141211:WARNING:x11_util.cc(1404)] X error received: serial 919, error_code 3 (BadWindow (invalid Window parameter)), request_code 4, minor_code 0 (X_DestroyWindow)
[0731/141215:INFO:GameCallbacks.cpp(193)] launcher/launcher (main) info Process closed with exit code 0

[0731/141215:INFO:GameCallbacks.cpp(193)] launcher/launcher (main) info Exception in thread "main" java.awt.AWTError: Assistive Technology not found: org.GNOME.Accessibility.AtkWrapper
at java.awt.Toolkit.loadAssistiveTechnologies(Toolkit.java:807)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:886)
at org.lwjgl.LinuxSysImplementation.<clinit>(LinuxSysImplementation.java:50)
at org.lwjgl.Sys.createImplementation(Sys.java:131)
at org.lwjgl.Sys.<clinit>(Sys.java:116)
at bib.I(SourceFile:2825)
at net.minecraft.client.main.Main.main(SourceFile:38)

[0731/141215:INFO:ClientHandler.cpp(149)] Shutting down!