RFR: 8282665: [REDO] ByteBufferTest.java: replace endless recursion with RuntimeException in void ck(double x, double y) [v2]

[Emanuel Peter]

> Until now, ck for doubles ignored the case when either x or y was NaN, it for example would let pass x=NaN and y=2.0.
> Further, instead of throwing an exception, it went into infinite recursion, with an eventual StackOverflowError.
> Now, we throw an exception that prints the values. I fixed the logic, and added an explanation.
> 
> All tests are passing.

Emanuel Peter has updated the pull request incrementally with one additional commit since the last revision:

  state reason for failure in Exception

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7723/files
  - new: https://git.openjdk.java.net/jdk/pull/7723/files/9bee927f..a96fbb5d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7723&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7723&range=00-01

  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7723.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7723/head:pull/7723

PR: https://git.openjdk.java.net/jdk/pull/7723