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textparse: fix NaN canonicalization check in OpenMetrics getFloatValue

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getFloatValue was testing p.exemplarVal instead of the parsed float when normalizing NaN to the canonical representation, so metric values that were NaN were not normalized correctly.

Signed-off-by: Weixie Cui <cuiweixie@gmail.com>
This commit is contained in:
Weixie Cui 2026-03-30 17:41:32 +08:00
parent d6c18a4d62
commit e28ae3eb6c
1 changed files with 1 additions and 1 deletions
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2
model/textparse/openmetricsparse.go
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@ -763,7 +763,7 @@ func (p *OpenMetricsParser) getFloatValue(t token, after string) (float64, error
return 0, fmt.Errorf("%w while parsing: %q", err, p.l.b[p.start:p.l.i])
}
// Ensure canonical NaN value.
if math.IsNaN(p.exemplarVal) {
if math.IsNaN(val) {
val = math.Float64frombits(value.NormalNaN)
}
return val, nil