On Mon, 25 Sep 2023 15:52:12 GMT, Aleksei Voitylov <avoity...@openjdk.org> 
wrote:

> test java.lang.String.RegionMatches1Tests fails on all platforms with 
> -XX:-CompactStrings option and on ARM32 where Compact Strings is disabled by 
> default. The fix is to return true immediately if len is negative, since for 
> negative length this condition will never be satisfied.
> 
> Testing: JCK, JTREG passed with the fix with -XX:-CompactStrings on x86_64 
> and on ARM32.

Looks good.

PS: I specifically like the "*Looks simple and harmless*" [comment on the PR of 
the original 
change](https://github.com/openjdk/jdk/pull/12528#pullrequestreview-1295839377) 
:)

-------------

Marked as reviewed by simonis (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/15906#pullrequestreview-1642774005

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