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fmt: fix caching bug in Scan
Black box test is too time-consuming, as the bug does not appear until Scan has processed 2 GB of input in total across multiple calls, so no test. Thanks to Frederick Mayle for the diagnosis and fix. Fixes #2809. R=golang-dev, r CC=golang-dev https://golang.org/cl/5611043
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@ -366,6 +366,7 @@ func newScanState(r io.Reader, nlIsSpace, nlIsEnd bool) (s *ss, old ssave) {
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s.fieldLimit = hugeWid
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s.maxWid = hugeWid
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s.validSave = true
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s.count = 0
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return
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}
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