RFR: bug: no warning shown for parameterized conversions [v2]

[Vicente Romero]

> no warning is shown for parameterized conversions

Vicente Romero has updated the pull request incrementally with one additional commit since the last revision:

  adding more test cases

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Changes:
  - all: https://git.openjdk.java.net/valhalla/pull/666/files
  - new: https://git.openjdk.java.net/valhalla/pull/666/files/977d8a38..41ac982e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=valhalla&pr=666&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=valhalla&pr=666&range=00-01

  Stats: 90 lines in 2 files changed: 89 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/666.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/666/head:pull/666

PR: https://git.openjdk.java.net/valhalla/pull/666