On Friday, February 19, 2016 at 3:56:34 PM UTC-8, Josh Haberman wrote:
> Thanks a lot for tracking this down. For reference, here it is in our bug 
> tracker: https://github.com/google/protobuf/issues/1243
> On Thursday, February 11, 2016 at 3:28:33 AM UTC-8, Ron Ben-Yosef wrote:
>> Hi,
>> I'm using the proto3 C++ library compiled in MSVC, and noticed some 
>> pretty strange behavior - using the JsonToBinaryString or 
>> JsonToBinaryStream functions, values in the upper half of the uint32 range 
>> get lost in the transition from JSON to binary.
>> After some investigation, it seems the issue's root cause is in the 
>> MathUtil::Sign function (called from NumberConvertAndCheck, which is called 
>> from DataPiece::GenericConvert, which gets called 
>> from DataPiece::ToUint32...)

Actually, there's a more basic problem here:  MathUtil::Sign should return 
1 or -1 (if the number is positive or negative, respectively), not value or 
-value.  This bug breaks the following conformance tests for C++ (the first 
two are broken for all languages because the C++ protobuf used by the 
conformance test can't parse a correct JSON response):


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