git: openjdk/jdk21u-dev: master: 8322512: StringBuffer.repeat does not work correctly after toString() was called

[Aleksey Shipilev]

Changeset: 6ee8f477
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2024-01-15 19:17:46 +0000
URL:       https://git.openjdk.org/jdk21u-dev/commit/6ee8f477721354ca6caaf62e74e24496b5ec850c

8322512: StringBuffer.repeat does not work correctly after toString() was called

Backport-of: df22fb322e6c4c9931a770bd0abf4c43b83c4e4a

! src/java.base/share/classes/java/lang/StringBuffer.java
! test/jdk/java/lang/StringBuilder/StringBufferRepeat.java