Summary

_Changes added by https://jira.mongodb.org/browse/CDRIVER-6419 _ 

Does not provide correct behaviour.

Environment

Please provide the version of the C / CXX driver.

Please provide the host OS, version, and architecture (example: Windows 10 64-bit x86).

Please provide the C / CXX compiler and version.

If applicable, please attach the full output of the cmake command used to configure the C / CXX driver.

If applicable, please provide the MongoDB server version and topology (standalone, replica set, or sharded cluster).

How to Reproduce

Steps to reproduce. If possible, please include a Short, Self Contained, Correct (Compilable), Example

Fix added by commit, cause incorrect decfloat handling.

https://github.com/mongodb/mongo-c-driver/commit/54a7e9f372bd8e1953298b60393b07b042360a87

Incorrect output - for cases:

FAIL  good  [12345678901234567890123456789012340.0] expected=1.234567890123456789012345678901234E+34 got=NaN
FAIL  signed  [-12345678901234567890123456789012340.0] expected=-1.234567890123456789012345678901234E+34 got=NaN
FAIL  36 digits  [12345678901234567890123456789012340.000] expected=1.234567890123456789012345678901234E+34 got=NaN
FAIL  dropped 1 no radix  [12345678901234567890123456789012341] expected=ERR got=NaN
FAIL  dropped 1 w/ radix  [12345678901234567890123456789012341.0] expected=ERR got=NaN
FAIL  dropped digit after radix  [1234567890123456789012345678901234.5] expected=ERR got=NaN
FAIL  dropped 1 signed  [-12345678901234567890123456789012341.0] expected=ERR got=NaN
FAIL  garbage  [abc] expected=ERR got=NaN
FAIL  34 digits E6112  [1234567890123456789012345678901234E6112] expected=ERR got=NaN
FAIL  fractional 35 digits  [0.12345678901234567890123456789012345] expected=ERR got=NaN
FAIL  35 nines  [99999999999999999999999999999999999] expected=ERR got=NaN
FAIL  leading zeros over precision  [000012345678901234567890123456789012345] expected=ERR got=NaN
FAIL  leading zeros over precision nonzero tail  [000012345678901234567890123456789012341] expected=ERR got=NaN
FAIL  leading zeros 35 digits  [000012345678901234567890123456789012345] expected=ERR got=NaN
FAIL  leading zeros 35 digits radix  [000012345678901234567890123456789012345.0] expected=ERR got=NaN
FAIL  leading zeros fractional over precision  [00001.2345678901234567890123456789012345] expected=ERR got=NaN
~            

Additional Background

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