Why is my nil error value not equal to nil?

Concise FAQ entry explaining typed nil values stored in interfaces, especially error.

• Author: Go Team
• Authority: primary
• Kind: faq
• URL: https://go.dev/doc/faq#nil_error

What it covers

• nil error comparison
• typed nil in interfaces
• error-specific interface traps

Why authoritative

Official Go FAQ answer for one of the most common interface nil pitfalls.

Use when

• why is this nil error non-nil
• why does my error compare unequal to nil
• what is a typed nil error in Go

Keywords

• nil error, typed nil, error interface, faq, interface nil

Used by

• nil-interfaces
• errors-as-language-semantics