Why Do I Get a 'Nil Pointer Dereference' Error When Accessing a Map Field in Go?

Pointer Dereferencing Error When Accessing Map Field

When attempting to access the field of a struct, an error is encountered:

invalid memory address or nil pointer dereference
gdreport/main.go:30 +0x1e6

This error occurs due to the map being initialized with empty pointers, resulting in nil values for its elements.

condition := map[string]*guardduty.Condition{}

To fix this issue, ensure that the map is initialized with valid pointers. Here's an example:

condition := map[string]*guardduty.Condition{
    "id": &guardduty.Condition{
        Equals: strPtr,
    },
}

By assigning a new condition with pointers, you can access its fields without encountering the nil pointer dereferencing error.

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