hg: jdk/jdk: 8246632: StringConcatFactory::makeConcatWithConstants no longer throws NullPointerException when an unexpected constant is null

[claes.redestad at oracle.com]

Changeset: 859193f32e34
Author:    redestad
Date:      2020-06-08 19:23 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/859193f32e34

8246632: StringConcatFactory::makeConcatWithConstants no longer throws NullPointerException when an unexpected constant is null
Reviewed-by: rriggs, mchung

! src/java.base/share/classes/java/lang/invoke/StringConcatFactory.java
! test/jdk/java/lang/String/concat/StringConcatFactoryInvariants.java