Issue

Cannot launch 1.16.5 using Java OpenJDK 11

Error message

Your Java Runtime is incompatible. Please edit your installation to use the bundled Java Runtime.
Name: Java version mismatch
URL: http://aka.ms/jnierror

Steps to reproduce

1. Create a new installation
2. Select Release 1.16.5
3. Manually set the JVM executable to the Java 11 binary, eg. 

   /usr/lib/jvm/java-11-openjdk/bin/java

1. Run the client, it crashes with the above error

Unaffected Launcher versions

Any versions prior to the release of Minecraft 1.17 might work

Suspected cause

I suspect it has to do with the java 16 check, to prevent client crashes with out-of-date JVM on 1.17, but it might force java 16 for any manually selected JVM on any client version.

Result

Unable to play minecraft with versions that depend on a specific JVM. Modded 1.16.5 (Cyan + Forge) wont run. (Cyan depends on Java 11 because Forge does not handle newer JVMs well)