hg: jdk/jdk: 8221430: StringBuffer(CharSequence) constructor truncates when -XX:-CompactStrings specified

[ivan.gerasimov at oracle.com]

Changeset: f847a42ddc01
Author:    igerasim
Date:      2019-04-09 16:32 -0700
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/f847a42ddc01

8221430: StringBuffer(CharSequence) constructor truncates when -XX:-CompactStrings specified
Reviewed-by: igerasim, rriggs
Contributed-by: Andrew Leonard <andrew_m_leonard at uk.ibm.com>, Ivan Gerasimov <ivan.gerasimov at oracle.com>

! src/java.base/share/classes/java/lang/AbstractStringBuilder.java
! src/java.base/share/classes/java/lang/StringBuffer.java
! src/java.base/share/classes/java/lang/StringBuilder.java
! test/jdk/java/lang/StringBuffer/CompactStringBuffer.java
! test/micro/org/openjdk/bench/java/lang/StringBuilders.java