RFR: JDK-8281003 - MethodHandles::lookup throws NPE if caller is null [v4]

[Tim Prinzing]

> JDK-8281003 - MethodHandles::lookup throws NPE if caller is null

Tim Prinzing has updated the pull request incrementally with one additional commit since the last revision:

  remove excess description

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7447/files
  - new: https://git.openjdk.java.net/jdk/pull/7447/files/c803a93b..7d1b97fe

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7447&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7447&range=02-03

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7447.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7447/head:pull/7447

PR: https://git.openjdk.java.net/jdk/pull/7447