hg: jdk8u/jdk8u-dev/hotspot: 8178870: instrumentation.retransformClasses cause coredump

[zgu at redhat.com]

Changeset: cb028a891ac9
Author:    zgu
Date:      2019-09-12 15:15 -0400
URL:       https://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/cb028a891ac9

8178870: instrumentation.retransformClasses cause coredump
Summary: Don't double-free cached class bytes on redefinition loading failure.
Reviewed-by: sspitsyn, jiangli

! src/share/vm/prims/jvmtiRedefineClasses.cpp
+ test/runtime/RedefineTests/RedefineDoubleDelete.java
+ test/runtime/RedefineTests/libRedefineDoubleDelete.c
+ test/runtime/RedefineTests/test8178870.sh