From 2b15aa63b7ef877573980c91658d6b79e6356409 Mon Sep 17 00:00:00 2001
From: David Symonds <dsymonds@golang.org>
Date: Fri, 29 Aug 2014 08:56:35 +1000
Subject: [PATCH] go.tools/cmd/vet: don't panic on zero arg Log method calls.

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/134000043
---
 cmd/vet/print.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd/vet/print.go b/cmd/vet/print.go
index 86958c71..3288d59d 100644
--- a/cmd/vet/print.go
+++ b/cmd/vet/print.go
@@ -496,7 +496,7 @@ func (f *File) checkPrint(call *ast.CallExpr, name string, firstArg int) {
 	isLn := strings.HasSuffix(name, "ln")
 	isF := strings.HasPrefix(name, "F")
 	args := call.Args
-	if name == "Log" {
+	if name == "Log" && len(args) > 0 {
 		// Special case: Don't complain about math.Log or cmplx.Log.
 		// Not strictly necessary because the only complaint likely is for Log("%d")
 		// but it feels wrong to check that math.Log is a good print function.