ForkedMain.nakedErr is not initialized on some paths

Sometimes jmh fails with
[jmh] Exception in thread "Thread-0" java.lang.NullPointerException: Cannot enter synchronized block because the return value of "java.lang.Throwable$PrintStreamOrWriter.lock()" is null
[jmh] at java.base/java.lang.Throwable.printStackTrace(Throwable.java:668)
[jmh] at java.base/java.lang.Throwable.printStackTrace(Throwable.java:659)
[jmh] at org.openjdk.jmh.runner.ForkedMain.hangup(ForkedMain.java:129)
[jmh] at org.openjdk.jmh.runner.ForkedMain$HangupThread.run(ForkedMain.java:157)