nilerr

README

nilerr

nilerr finds code which returns nil even though it checks that error is not nil.

func f() error {
	err := do()
	if err != nil {
		return nil // miss
	}
}

nilerr also finds code which returns error even though it checks that error is nil.

func f() error {
	err := do()
	if err == nil {
		return err // miss
	}
}

nilerr ignores code which has a miss with ignore comment.

func f() error {
	err := do()
	if err != nil {
		//lint:ignore nilerr reason
		return nil // ignore
	}
}

Documentation

Index

• Constants
• Variables
• type ReferrersHolder

Constants

const Doc = "nilerr checks returning nil when err is not nil"

Variables

var Analyzer = &analysis.Analyzer{
	Name: "nilerr",
	Doc:  Doc,
	Run:  run,
	Requires: []*analysis.Analyzer{
		buildssa.Analyzer,
		commentmap.Analyzer,
	},
}

Types

type ReferrersHolder

type ReferrersHolder interface {
	Referrers() *[]ssa.Instruction
}