hg: jdk/jdk: 8220352: Crash with assert(external_guard || result != __null) failed: Invalid JNI handle

[chris.plummer at oracle.com]

Changeset: db545bf94fbc
Author:    cjplummer
Date:      2019-03-13 19:42 -0700
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/db545bf94fbc

8220352: Crash with assert(external_guard || result != __null) failed: Invalid JNI handle
Summary: Don't delete globalrefs that might still be referenced
Reviewed-by: gadams, jcbeyler, sspitsyn

! test/hotspot/jtreg/vmTestbase/nsk/jvmti/MonitorWait/monitorwait001/monitorwait001.cpp
! test/hotspot/jtreg/vmTestbase/nsk/jvmti/MonitorWaited/monitorwaited001/monitorwaited001.cpp