Shadow Version

4.0.1 (Latest as 20181001)

Gradle Version

4.10.2 (Latest as 20181001)

Expected Behavior

shadowJar should work as intended.

Actual Behavior

java.lang.UnsupportedOperationException (no error message) is thrown from shadow.org.objectweb.asm.ClassVisitor.java:135

https://gitlab.ow2.org/asm/asm/blob/master/asm/src/main/java/org/objectweb/asm/ClassVisitor.java#L130
The error message "This feature requires ASM6" was recently added.

Gradle Build Script(s)

https://github.com/finalchild/kotlinbukkit/blob/master/build.gradle

Failed CI Build: https://travis-ci.org/finalchild/kotlinbukkit/builds/435489401
Stacktrace: https://pastebin.com/daMmwrbk