The current dependent version of 6.2.1 does not support Java 13 or later.
https://gitlab.ow2.org/asm/asm/-/blob/ASM_6_2_1/asm/src/main/java/org/objectweb/asm/ClassReader.java#L176

My project is using randomizedtesting but cannot test with Java 13 due to this problem. Any plan to upgrade the dependent version?