RFR: 8337302: Undefined type variable results in null [v5]

[Rafael Winterhalter]

> When a type uses a type variable without a declaration, no exception is thrown. This change triggers a `TypeNotFoundException` to be thrown.

Rafael Winterhalter has updated the pull request incrementally with one additional commit since the last revision:

  8337302: Add comment with class that is created.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20535/files
  - new: https://git.openjdk.org/jdk/pull/20535/files/10d73b6c..e9513627

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20535&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20535&range=03-04

  Stats: 6 lines in 1 file changed: 6 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/20535.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20535/head:pull/20535

PR: https://git.openjdk.org/jdk/pull/20535