Log a Throwable rather than a Cause in OpenTracing's logError

[ghostdogpr]

Some tracer libraries such as dd-trace (Datadog) have special logic when the error type is a Throwable, but are not able to do anything with a Cause.

Before I would see this with no details about the error:

After that change, I would get the error details with the full stack trace:

The spec says "For languages that support such a thing (e.g., Java, Python), the actual Throwable/Exception/Error object instance itself." so I think it makes sense not just for Datadog.

Relevant logic in dd-trace: https://github.com/DataDog/dd-trace-java/blob/a760c687369c971fa38d95c103883ed672394e6c/dd-trace-ot/src/main/java/datadog/opentracing/DefaultLogHandler.java#L45

[grouzen]

Thanks for the contribution! It is definitely a reasonable change and I'm happy to merge it!

[ghostdogpr]

Thanks! Would it be possible to do a release in the near future? 🙏

[grouzen]

Sure, I'll cut the next release tomorrow.