From: Robert Griesemer <gri@golang.org>
Date: Mon, 6 Dec 2010 23:34:23 +0000 (-0800)
Subject: godoc: don't call flush if position is not valid
X-Git-Tag: weekly.2010-12-08~30
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=2fd2991eac8866fa72b6f160d3425727de6f200d;p=gostls13.git

godoc: don't call flush if position is not valid
(fixes new godoc crash when looking at spec)

R=rsc, r, iant
CC=golang-dev
https://golang.org/cl/3488041
---

diff --git a/src/cmd/godoc/spec.go b/src/cmd/godoc/spec.go
index df36caaa72..b1c1a883f7 100644
--- a/src/cmd/godoc/spec.go
+++ b/src/cmd/godoc/spec.go
@@ -39,7 +39,9 @@ func (p *ebnfParser) flush() {
 
 
 func (p *ebnfParser) next() {
-	p.flush()
+	if p.pos.IsValid() {
+		p.flush()
+	}
 	p.pos, p.tok, p.lit = p.scanner.Scan()
 	if p.tok.IsKeyword() {
 		// TODO Should keyword mapping always happen outside scanner?