Always return when err is not nil.

bool_test.go

diff --git a/bool_test.go b/bool_test.go
index 72a12be..fe45b8d 100644
--- a/bool_test.go
+++ b/bool_test.go
@@ -9,7 +9,7 @@
 	"strconv"
 	"testing"
 
-	. "github.com/ogier/pflag"
+	. "github.com/spf13/pflag"
 )
 
 // This value can be a boolean ("true", "false") or "maybe"

example_test.go

diff --git a/example_test.go b/example_test.go
index 6aaed3c..9be7a49 100644
--- a/example_test.go
+++ b/example_test.go
@@ -11,7 +11,7 @@
 	"strings"
 	"time"
 
-	flag "github.com/ogier/pflag"
+	flag "github.com/spf13/pflag"
 )
 
 // Example 1: A single string flag called "species" with default value "gopher".

flag.go

diff --git a/flag.go b/flag.go
index ad65dda..72165f6 100644
--- a/flag.go
+++ b/flag.go
@@ -498,6 +498,7 @@
 			if len(args) == 0 {
 				return
 			}
+			return
 		}
 		if alreadythere {
 			if bv, ok := flag.Value.(boolFlag); ok && bv.IsBoolFlag() {
@@ -551,6 +552,9 @@
 		} else {
 			args, err = f.parseShortArg(s, args)
 		}
+		if err != nil {
+		   return
+		}
 	}
 	return
 }