From da8934445aa10099bf05813c57858e56c1654e12 Mon Sep 17 00:00:00 2001
From: Paul Stuart <pauleyphonic@gmail.com>
Date: Sat, 14 May 2016 16:45:44 -0700
Subject: [PATCH] bounds checking

---
 internal/config/config.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/config/config.go b/internal/config/config.go
index 1f5b64873..a88fb9a73 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -553,6 +553,9 @@ func parseFile(fpath string) (*ast.Table, error) {
 	for _, env_var := range env_vars {
 		str := strings.TrimPrefix(string(env_var), "$(")
 		args := strings.Fields(strings.TrimSuffix(str, ")"))
+		if len(args) == 0 {
+			return nil, fmt.Errorf("Empty command string")
+		}
 		v, err := exec.Command(args[0], args[1:]...).Output()
 		if err != nil {
 			return nil, err