Nashorn bug in Java 8 u40: Cannot parse JSON: { 0: null, 100: null }

[Marcus Lagergren]

Hi Kaj Magnus,

We still don’t have a huge user base, but we are working hard on building up our test coverage. Hence, we get some small embarrassments like this from time to time, but they will hopefully get less frequent soon. You will find that most issues will be addressed quicker than new releases come out. You can track the issues in JIRA to see where the fixes are checked in. Should an emergency arise, you can always build the latest Nashorn from source. Being open source, our fixes are visible to the world immediately, even though they are not bundled. Naturally, we will push very hard to get them into as early a release as we can, too.

/M

> On 09 Mar 2015, at 11:28, Hannes Wallnoefer <hannes.wallnoefer at oracle.com> wrote:
> 
> Hi Kaj Magnus,
> 
> Thanks for the report. It's unfortunate this bug ended up in 8u40. Obviously the fix for the bug you linked was incomplete, and we weren't aware of that.
> 
> The problem has been fixed in the meantime (together with a rewrite of the JSON parser that makes JSON parsing much faster). The fix will be part of the 8u60 release. The current 8u60 early access release available at https://jdk8.java.net/download.html already contains the fix.
> 
> I'm also adding additional tests so this won't happen again:
> 
> https://bugs.openjdk.java.net/browse/JDK-8074687
> 
> Regards,
> Hannes
> 
> Am 2015-03-08 um 06:20 schrieb Kaj Magnus Lindberg:
>> Hi dear Nashorn developers,
>> 
>> There's an ArrayIndexOutOfBoundsException bug when I try to parse this
>> JSON: '{ "0":null, "100": null }'.
>> 
>> Have a look here:
>> 
>> jjs> JSON.parse('{ "0":null, "65503": null }')
>> java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 65503
>> jjs>
>> jjs> JSON.parse('{ "0":null, "100": null }')
>> java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 100
>> jjs>
>> jjs> JSON.parse('{ "0":null, "65": null }')
>> java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 65
>> jjs>
>> jjs> JSON.parse('{ "0":null, "64": null }')  // Works
>> [object Object]
>> jjs>
>> jjs> JSON.parse('{ "_0":null, "_100": null }')  // Works
>> [object Object]
>> jjs>
>> jjs>
>> 
>> I found a bug report that was fixed that made { 0: null, 64: null } work.
>> But as you can see above, { 0: null, 65: null } doesn't work.
>>   https://bugs.openjdk.java.net/browse/JDK-8048718
>> 
>> Version details:
>> 
>> $ java -version
>> java version "1.8.0_40"
>> Java(TM) SE Runtime Environment (build 1.8.0_40-b25)
>> Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)
>> 
>> $ uname -a
>> Linux kajmagnus-lt-15 3.19.0-031900-generic #201502091451 SMP Mon Feb 9
>> 14:52:52 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
>> 
>> $ cat /etc/issue
>> Linux Mint 17.1 Rebecca \n \l
>> 
>> (This bug wasn't present in an earlier Nashorn version, u20 or u22 or
>> something like that.)
>> 
>> Best regards,
>> KajMagnus
>