hg: amber/amber: sealed interfaces or abstract classes with an empty permits clause must have subtypes

[vicente.romero at oracle.com]

Changeset: 543585aa050d
Author:    vromero
Date:      2019-10-10 14:29 -0400
URL:       https://hg.openjdk.java.net/amber/amber/rev/543585aa050d

sealed interfaces or abstract classes with an empty permits clause must have subtypes

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties
! test/langtools/tools/javac/sealed/SealedCompilationTests.java