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benchfmt: return an error in case of a non UTF-8 encoded file #9

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benchfmt: return an error in case of a non UTF-8 encoded file #9

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5 changes: 5 additions & 0 deletions benchfmt/reader.go
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Original file line number Diff line number Diff line change
Expand Up @@ -149,6 +149,11 @@ func (r *Reader) Scan() bool {
r.result.line++
// We do everything in byte buffers to avoid allocation.
line := r.s.Bytes()
// We only accept utf-8 encoded files.
if !utf8.Valid(line) {
r.err = fmt.Errorf("%s: invalid encode, only utf-8 encoded files are supported", r.result.fileName)
return false
}
// Most lines are benchmark lines, and we can check
// for that very quickly, so start with that.
if bytes.HasPrefix(line, benchmarkPrefix) {
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