How Can I Get More Detailed Stack Traces for Easier Go Panic Debugging?

Enriching Panics with Detailed Stack Traces

Panic handling in Go involves printing an error message followed by a call stack. However, this default behavior often obscures the actual source of the error, making debugging challenging.

Consider the following code snippet:

value, err := some3rdpartylib.DoSomething()
if err != nil {
    panic(err)
}

If err is non-nil, the resulting panic message will include the error explanation but not the specific code line that caused the error to be returned.

Unraveling the Error's Origin

To trace the error back to its source, one option is to utilize the errors package. By implementing the StackTrace() method in your error types, you can access the stack trace associated with the error.

type stackTracer interface {
    StackTrace() errors.StackTrace
}

err, ok := err.(stackTracer) // Check if error implements stackTracer
if !ok {
    // Handle case where error doesn't implement stackTracer
}

stack := err.StackTrace()
fmt.Println(stack) // Print the stack trace

Alternative Error Handling Libraries

Additionally, there are other third-party libraries that expand on Go's default error handling capabilities:

• eris: Provides readable stack traces and flexible formatting support.
• go-errors/errors: Adds stacktrace support to Go errors.
• palantir/stacktrace: Implements stack traces in Go to assist in debugging.

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