git: openjdk/amber: sealed-types: implementing narrowing reference conversion for sealed classes

[Vicente Romero]

Changeset: 39990258
Author:    Vicente Romero <vicente.romero at oracle.com>
Date:      2020-10-22 20:49:38 +0000
URL:       https://git.openjdk.java.net/amber/commit/39990258

implementing narrowing reference conversion for sealed classes

! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Types.java
! test/langtools/tools/javac/sealed/SealedCompilationTests.java