For example:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.openjdk.jmh.util.Utils (file:/Users/bpb/Work/CoreLibs/bugs/jdk/XBufferPut-8245121/XBufferPut/target/benchmarks.jar) to field java.io.Console.cs
WARNING: Please consider reporting this to the maintainers of org.openjdk.jmh.util.Utils
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
# JMH version: 1.20-SNAPSHOT
# VM version: JDK 15-internal, VM 15-internal+0-2020-06-04-1554111.bpb...