typeof Long is not 'number' anymore

[Emilian Bold]

I just read a few of the bugs linked and it does seem worrisome. So,
Nashorn cannot reliably be used as a glue between Java code that uses longs?


--emi

On Wed, Oct 12, 2016 at 5:10 PM, Frantzius, Jörg <Joerg.Frantzius at aperto.com
> wrote:

> Hi,
>
> as of JDK 1.8.0_101, the following JUnit test fails:
>
>     @Test
>     public void testLongIsNumber() {
>         jdk.nashorn.api.scripting.ScriptObjectMirror isNumberFunction =
> eval("function isNumber(arg) {\n" +
>             "    return typeof arg === 'number';\n" +
>             "}\n" +
>             "");
>         Object result = isNumberFunction.call(isNumberFunction, 1L);
>         assertTrue((boolean) result);
>     }
>
> This breaks e.g. Nodyn, where Long numbers resulting from
> java.io.File.length() are passed into https://nodejs.org/api/util.
> html#util_util_isnumber_object , resulting in some „if" clause now taking
> the wrong turn. I guess this is a side-effect of
> https://bugs.openjdk.java.net/browse/JDK-8144020 .
>
> While I’m probably able to patch this in Nodyn, I find it a bit
> frightening that any other code out there that relies on Longs being typeof
> ‚number‘ will break now, in particular because there is a lot of JDK API
> that returns Long...
>
> Regards,
> Jörg
>
>
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