// non-zero and only the second line above, the TOC,
		// is what matters.
	})
}

// rZipBytes returns the bytes of a recursive zip file, without
// putting it on disk and triggering certain virus scanners.
func rZipBytes() []byte {
	s := `
0000000 50 4b 03 04 14 00 00 00 08 00 08 03 64 3c f9 f4
0000010 89 64 48 01 00 00 b8 01 00 00 07 00 00 00 72 2f
0000020 72 2e 7a 69 70 00 25 00 da ff 50 4b 03 04 14 00

		// building. They are used to mark duplicate entries.
		files := make(map[string]int)
		knownDirs := make(map[string]int)

		// dirs[name] is true if name is known to be a directory,
		// because it appears as a prefix in a path.
		dirs := make(map[string]bool)

		for _, file := range r.File {
			isDir := len(file.Name) > 0 && file.Name[len(file.Name)-1] == '/'
			name := toValidName(file.Name)

			// like the second arg in the call below:
			//
			//     myfunction(42, "foo")
			//
			// If a var has no name we won't see attempts to
			// refer to it via "C.<name>", so skip these vars
			//
			// See issue 53000 for more context.
			if name == "" {
				break
			}
			typOff, _ := e.Val(dwarf.AttrType).(dwarf.Offset)
			if typOff == 0 {
				if e.Val(dwarf.AttrSpecification) != nil {