Unexpected nil pointer dereference when using third-party library in Go 1.18
I'm attempting to set up I've searched everywhere and can't find a clear answer. I'm working with a `nil pointer dereference` behavior when trying to use the `github.com/yourusername/some-library` package in my Go application. I have a struct that holds some configuration data, and I'm initializing it with values before passing it to the library function. However, when the function executes, it seems to be accessing fields that are not properly initialized, leading to a runtime panic. Here is a snippet of the relevant code: ```go package main import ( "fmt" "github.com/yourusername/some-library" ) type Config struct { Field1 string Field2 *int // This can be nil if not set } func main() { var field2Value *int config := Config{ Field1: "Hello", Field2: field2Value, // Intentionally left nil } err := someLibrary.FunctionThatUsesConfig(config) if err != nil { fmt.Println("behavior:", err) } } ``` The library function's documentation states that it expects a non-nil pointer for `Field2`, and I understand that I should initialize it. I tried allocating memory for `Field2` using `new(int)` and setting its value, but the library behaves unexpectedly and still panics after I do that. Here’s what I did: ```go field2Value := new(int) *field2Value = 10 ``` However, I still see the same panic message in my logs: ``` panic: runtime behavior: invalid memory address or nil pointer dereference ``` I suspect that the library might be calling methods or accessing fields of `Config` in a way that I don't fully understand. I also checked for any issues in the library's repository but couldn't find any related discussions. Has anyone faced similar issues, or could there be a more subtle question with how I'm passing the config struct? Any guidance would be appreciated! I've been using Go for about a year now. Any pointers in the right direction? My team is using Go for this web app. What's the correct way to implement this? I'd love to hear your thoughts on this.