golang/go · error

: duplicate entries in zip file

Error message

: duplicate entries in zip file

What it means

Error ": duplicate entries in zip file" thrown in golang/go.

Source

Thrown at src/archive/zip/reader.go:739

}

// A fileListEntry is a File and its ename.
// If file == nil, the fileListEntry describes a directory without metadata.
type fileListEntry struct {
	name  string
	file  *File
	isDir bool
	isDup bool
}

type fileInfoDirEntry interface {
	fs.FileInfo
	fs.DirEntry
}

func (f *fileListEntry) stat() (fileInfoDirEntry, error) {
	if f.isDup {
		return nil, errors.New(f.name + ": duplicate entries in zip file")
	}
	if !f.isDir {
		return headerFileInfo{&f.file.FileHeader}, nil
	}
	return f, nil
}

// Only used for directories.
func (f *fileListEntry) Name() string      { _, elem, _ := split(f.name); return elem }
func (f *fileListEntry) Size() int64       { return 0 }
func (f *fileListEntry) Mode() fs.FileMode { return fs.ModeDir | 0555 }
func (f *fileListEntry) Type() fs.FileMode { return fs.ModeDir }
func (f *fileListEntry) IsDir() bool       { return true }
func (f *fileListEntry) Sys() any          { return nil }

func (f *fileListEntry) ModTime() time.Time {
	if f.file == nil {
		return time.Time{}

View on GitHub (pinned to b6b368adc5)

When it happens

Trigger: Thrown at src/archive/zip/reader.go:739 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of golang/go@b6b368adc5 (2026-08-12). Data as JSON: /api/errors/849751dc24668554. Report an issue: GitHub.