Don't panic on unmatched default

porcelain.go

@@ -66,7 +66,9 @@ func parseBranchinfo(s string) {
 
 		reCatch := regexp.MustCompile("\\s([a-zA-Z0-9-_\\.]+)\\s(?:\\W[\\w\\s]*\\W)")
 		matchDefault = reCatch.FindStringSubmatch(s)
-		Git.commit = matchDefault[1]
+		if matchDefault != nil {
+			Git.commit = matchDefault[1]
+		}
 
 	} else {
 
@@ -298,9 +300,9 @@ func execRevParse() (string, error) {
 	out, err := cmd.Output()
 	if err != nil {
 		// if strings.Contains(err.Error(), "128") {
-		// 	return "initial"
+		//	return "initial"
 		// } else {
-		// 	panic(err)
+		//	panic(err)
 		// }
 		return "initial", err
 		// TODO: would be nice to be able to differentiate between not in git and before

porcelain_test.go

@@ -15,6 +15,8 @@ var (
 		"## master...origin/master [ahead 1, behind 99]",
 		"## Initial commit on master",
 		"## HEAD (no branch)",
+		"## user/feature...origin/user/feature",
+		"## user/feature...origin/user/feature [ahead 99, behind 5]",
 	}
 	branchInfoExpected = []gitinfo{
 		gitinfo{branch: "new2", commit: "", remote: "", trackedBranch: "", ahead: 0, behind: 0},
@@ -24,6 +26,8 @@ var (
 		gitinfo{branch: "master", commit: "", remote: "origin", trackedBranch: "origin/master", ahead: 1, behind: 99},
 		gitinfo{branch: "master", commit: "", remote: "", trackedBranch: "", ahead: 0, behind: 0},
 		gitinfo{branch: "", commit: "HEAD", remote: "", trackedBranch: "", ahead: 0, behind: 0},
+		gitinfo{branch: "user/feature", commit: "", remote: "origin", trackedBranch: "user/feature", ahead: 0, behind: 0},
+		gitinfo{branch: "user/feature", commit: "", remote: "origin", trackedBranch: "user/feature", ahead: 99, behind: 5},
 	}
 )