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godoc: don't call flush if position is not valid

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(fixes new godoc crash when looking at spec)

R=rsc, r, iant
CC=golang-dev
https://golang.org/cl/3488041
This commit is contained in:
Robert Griesemer 2010-12-06 15:34:23 -08:00
parent 5a9ad8b9e3
commit 2fd2991eac
1 changed files with 3 additions and 1 deletions
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4
src/cmd/godoc/spec.go
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@ -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?