hg: jdk9/dev/jdk: 8150488: Scanner.findAll() can return infinite stream if regex matches zero chars

[stuart.marks at oracle.com]

Changeset: 470bf239be45
Author:    smarks
Date:      2017-04-28 12:16 -0700
URL:       http://hg.openjdk.java.net/jdk9/dev/jdk/rev/470bf239be45

8150488: Scanner.findAll() can return infinite stream if regex matches zero chars
Reviewed-by: sherman

! src/java.base/share/classes/java/util/Scanner.java
! test/java/util/Scanner/ScannerStreamTest.java