utils: add missing error info in case of cmd failure (#6355)

hashicorp · Sep 24, 2019 · a555ce8 · a555ce8
1 parent 8fa3695
commit a555ce8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/docker/utils.go b/drivers/docker/utils.go
@@ -159,7 +159,7 @@ func authFromHelper(helperName string) authBackend {
 			default:
 				return nil, err
 			case *exec.ExitError:
-				return nil, fmt.Errorf("%s with input %q failed with stderr: %s", helper, repo, output)
+				return nil, fmt.Errorf("%s with input %q failed with stderr: %s", helper, repo, err.Error())
 			}
 		}