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https://issues.apache.org/jira/browse/THRIFT-1497?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Randy Abernethy resolved THRIFT-1497.
-------------------------------------

       Resolution: Fixed
    Fix Version/s: 0.9.2
         Assignee: Randy Abernethy

This seems to have been fixed in the raft of JS patches between 0.9.1 and 
0.9.2. Tests with large and small i64 values pass (e.g. 0, 2, 4, 2^52). N.B. 
JavaScript cannot handle i64s larger than 2^52 safely.

> i64 type not supported in JavaScript. Low-order bits lost.
> ----------------------------------------------------------
>
>                 Key: THRIFT-1497
>                 URL: https://issues.apache.org/jira/browse/THRIFT-1497
>             Project: Thrift
>          Issue Type: Bug
>          Components: JavaScript - Library
>            Reporter: Kenny
>            Assignee: Randy Abernethy
>              Labels: javascript, thrift
>             Fix For: 0.9.2
>
>
> When using i64 values that are larger than 2^53 JavaScript does not keep the 
> low-order bits.
> I have a function returning i64 expecting to use it as an id to a later 
> function. Data is lost when a client calls this function in JavaScript 
> because it doesn't end up with the full precision.



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