RFR: 8216407: java.util.UUID.fromString accepts input that does not match expected format

[Alan Bateman]

On 06/03/2020 18:15, Roger Riggs wrote:
> Hi Chihiro, et.al.,
>
> Thanks for taking a look at this issue,  however...
>
> There has been a long history of concerns[1] about breaking existing 
> applications
> that depend on the loose parsing of UUIDs.  Throwing an exception 
> where it did not
> previously is an incompatible change.
>
> The crucial concern about performance parsing conforming strings has 
> been addressed by:
>
> 8196334 Optimize UUID#fromString 
> <https://bugs.openjdk.java.net/browse/JDK-8196334>
>
> I propose to close these as WILL-NOT-FIX: and hope that the next 
> several times it gets reported
> they will be closed as duplicates.
>
> 8216407  <https://bugs.openjdk.java.net/browse/JDK-8216407> 
> java.util.UUID.fromString accepts input that does not match expected 
> format
>
> 8165199 
> <https://bugs.openjdk.java.net/browse/JDK-8165199>UUID.fromString 
> accepts wrong placements of the dashes
As you say, any tightening up of the validation after 15+ years will 
create a potential compatibility issue and might not be worth it. Maybe 
we could re-purpose JDK-8216407 to clarifying the javadoc instead? That 
would at least help with these bug reports when people are surprise that 
fromString doesn't fail.

-Alan