JDK-8239787 : AArch64: String.indexOf may incorrectly handle empty strings

[Alexey Bakhtin]

Hello Yuri,

Here is webrev with fix and new jtreg test :
http://cr.openjdk.java.net/~bae/8239787/webrev.01/

Thank you
Alexey

> On 28 Feb 2020, at 11:45, Yuri Nesterenko <yan at azul.com> wrote:
> 
> /Hi Alexey, could you please provide a regression test with this fix?
> Thanks, --yan