[2020-10-27T04:32:19,395Z] /opt/mach5/mesos/work_dir/slaves/47535081-0322-4d83-bb78-f7e11abb86d0-S27708/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/5394e959-ff1f-491f-9083-70e12db6f12d/runs/29957915-ce19-4d4f-a2d6-f78b18356cc8/workspace/open/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java:2097: error: incompatible types: inference variable K#1 has incompatible equality constraints V#2,K#2
[2020-10-27T04:32:19,395Z] setTabAt(tab, i, untreeify(t.first));
[2020-10-27T04:32:19,395Z] ^
[2020-10-27T04:32:19,395Z] where K#1,V#1,V#2,K#2 are type-variables:
[2020-10-27T04:32:19,395Z] K#1 extends Object declared in method <K#1,V#1>untreeify(Node<K#1,V#1>)
[2020-10-27T04:32:19,395Z] V#1 extends Object declared in method <K#1,V#1>untreeify(Node<K#1,V#1>)
[2020-10-27T04:32:19,395Z] V#2 extends Object declared in class ConcurrentHashMap
[2020-10-27T04:32:19,404Z] K#2 extends Object declared in class ConcurrentHashMap
[2020-10-27T04:32:19,404Z] 1 error

But ConcurrentHashMap has not been modified in nearly a year!

Could this be a spurious error?