Deadlock in tests

[ascopes]

Seems to be a deadlock in the tests somewhere.

Identify it and fix it.

[ascopes]

Seems on Mockito 4.8.1 and Java 19 (Coretto) that this is consistently reproducible now.

./mvnw -pl java-compiler-testing test -T32C -Dsurefire.parallel.forcedTimeout=10 -Dsurefire.parallel.timeout=10 -Dparallel=classesAndMethods -Dsurefire.timeout=10 --debug -DargLine="-Dorg.slf4j.simpleLogger.log=INFO -Dorg.slf4j.simpleLogger.log.io.github.ascopes.jct=DEBUG -Xshare:off -XX:+FlightRecorder -XX:StartFlightRecording=duration=200s,filename=flight.jfr"

Opened up mockito/mockito#2767 in response to this.

[ascopes]

Seems to be occurring under -T1C, so this is not a concurrency issue.

[ascopes]

Appears to be impacting Java 19 at the moment.

[ascopes]

Looks like mockito/mockito#2780 fixes this, after testing locally.

[ascopes]

Changes have been merged into Mockito's main branch. Now just waiting for a new release and this should be able to be closed.