but guarantees never to return nil. If C's malloc indicates out of memory,
the helper function crashes the program, like when Go itself runs out
of memory. Because C.malloc cannot fail, it has no two-result form
that returns errno.

# C references to Go

Go functions can be exported for use by C code in the following way:

	//export MyFunction

	}
}

func TestCompressedDirectory(t *testing.T) {
	// Empty Java JAR, with a compressed directory with uncompressed size 0
	// which should not fail.
	//
	// Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
	// --------  ------  ------- ---- ---------- ----- --------  ----
	//        0  Defl:N        2   0% 12-01-2022 16:50 00000000  META-INF/

	sys, ok := fi.Sys().(*syscall.Stat_t)
	if !ok {
		return nil
	}
	h.Uid = int(sys.Uid)
	h.Gid = int(sys.Gid)
	if doNameLookups {
		// Best effort at populating Uname and Gname.
		// The os/user functions may fail for any number of reasons
		// (not implemented on that platform, cgo not enabled, etc).
		if u, ok := userMap.Load(h.Uid); ok {
			h.Uname = u.(string)
		} else if u, err := user.LookupId(strconv.Itoa(h.Uid)); err == nil {