S RFR: 8010783: assert(s->refcount() !=0) failed

[Karen Kinnear]

Please review for lambda:

http://cr.openjdk.java.net/~acorn/8010783/webrev/src/share/vm/classfile/bytecodeAssembler.cpp.sdiff.html

Passes test in bug report for fastdebug: java -XX:+CompileTheWorld -XX:+CompileTheWorldStartAt=12
-Xbootclasspath/p:interclient-core.jar

vm.quick.testlist, lang, vm jck's in progress on on linux-x64

thanks,
Karen