Fixes issue with errors in file-stat when getting owner and group

lib.go

@@ -1873,8 +1873,21 @@ var stdLibrary = vars{
 		stat := info.Sys().(*syscall.Stat_t)
 		u := strconv.FormatUint(uint64(stat.Uid), 10)
 		g := strconv.FormatUint(uint64(stat.Gid), 10)
-		usr, _ := user.LookupId(u)
-		group, _ := user.LookupGroupId(g)
+		var userString string
+		usr, err := user.LookupId(u)
+		if err != nil {
+			userString = ""
+		} else {
+			userString = usr.Username
+		}
+
+		var groupString string
+		group, err := user.LookupGroupId(g)
+		if err != nil {
+			groupString = ""
+		} else {
+			groupString = group.Name
+		}
 
 		out := make([]expression, 10)
 		out[0] = []expression{"name", info.Name()}
@@ -1884,8 +1897,8 @@ var stdLibrary = vars{
 		out[4] = []expression{"is-dir?", info.IsDir()}
 		out[5] = []expression{"is-symlink?", false}
 		out[6] = []expression{"path", fp}
-		out[7] = []expression{"owner", usr.Username}
-		out[8] = []expression{"group", group.Name}
+		out[7] = []expression{"owner", userString}
+		out[8] = []expression{"group", groupString}
 		out[9] = []expression{"modestring", strconv.FormatUint(uint64(info.Mode()), 8)}
 
 		ln, err := os.Readlink(fp)

main.go

@@ -18,7 +18,7 @@ import (
 	ln "github.com/peterh/liner"
 )
 
-const version = "1.0.5"
+const version = "1.0.6"
 
 const globalLibPath = "/usr/local/lib/slope/modules/"