How Can I Get a Detailed Stack Trace to Debug Errors Originating in External Go Libraries?

Getting the Stack Trace that Points to the Actual Error Source

In the context of a panic due to an external library error, it is desirable to trace the error back to its origin within the library's code. While the default Go stack trace only points to the panicing line, a need arises for deeper investigation.

To achieve this, the "error" package provides an interface called "stackTracer" that enables access to the error's stack trace. By wrapping the original error and implementing this interface, the actual source of the error can be discovered.

type stackTracer interface {
    StackTrace() errors.StackTrace
}

To retrieve the stack trace from a wrapped error:

err, ok := err.(stackTracer)
if ok {
    stack := err.StackTrace()
    fmt.Println(stack)
}

Additionally, several third-party libraries offer error handling capabilities with varying degrees of functionality:

• eris: Readable stack traces and flexible formatting.
• go-errors/errors: Adds stacktrace support to errors in Go.
• palantir/stacktrace: Integrates Java-style stack traces into Go.

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