From 9d6cc5fd083f8e30134f26983442adc31a10e05f Mon Sep 17 00:00:00 2001
From: Josh Bleecher Snyder <josharian@gmail.com>
Date: Fri, 20 Jun 2014 11:08:45 -0700
Subject: [PATCH] go.tools/cmd/vet: prevent panic on goto without label

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/107260043
---
 cmd/vet/deadcode.go          | 4 +++-
 cmd/vet/testdata/deadcode.go | 5 +++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/cmd/vet/deadcode.go b/cmd/vet/deadcode.go
index ade75b0b71..3b306c2104 100644
--- a/cmd/vet/deadcode.go
+++ b/cmd/vet/deadcode.go
@@ -81,7 +81,9 @@ func (d *deadState) findLabels(stmt ast.Stmt) {
 	case *ast.BranchStmt:
 		switch x.Tok {
 		case token.GOTO:
-			d.hasGoto[x.Label.Name] = true
+			if x.Label != nil {
+				d.hasGoto[x.Label.Name] = true
+			}
 
 		case token.BREAK:
 			stmt := d.breakTarget
diff --git a/cmd/vet/testdata/deadcode.go b/cmd/vet/testdata/deadcode.go
index 3028c98bc3..5370bc32f6 100644
--- a/cmd/vet/testdata/deadcode.go
+++ b/cmd/vet/testdata/deadcode.go
@@ -2118,3 +2118,8 @@ var _ = func() int {
 	}
 	println() // ok
 }
+
+var _ = func() {
+	// goto without label used to panic
+	goto
+}