diff options
Diffstat (limited to 'vendor/github.com/prometheus/client_golang/prometheus/desc.go')
| -rw-r--r-- | vendor/github.com/prometheus/client_golang/prometheus/desc.go | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/desc.go b/vendor/github.com/prometheus/client_golang/prometheus/desc.go index 68ffe3c24..ad347113c 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/desc.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/desc.go @@ -189,12 +189,15 @@ func (d *Desc) String() string { fmt.Sprintf("%s=%q", lp.GetName(), lp.GetValue()), ) } - vlStrings := make([]string, 0, len(d.variableLabels.names)) - for _, vl := range d.variableLabels.names { - if fn, ok := d.variableLabels.labelConstraints[vl]; ok && fn != nil { - vlStrings = append(vlStrings, fmt.Sprintf("c(%s)", vl)) - } else { - vlStrings = append(vlStrings, vl) + vlStrings := []string{} + if d.variableLabels != nil { + vlStrings = make([]string, 0, len(d.variableLabels.names)) + for _, vl := range d.variableLabels.names { + if fn, ok := d.variableLabels.labelConstraints[vl]; ok && fn != nil { + vlStrings = append(vlStrings, fmt.Sprintf("c(%s)", vl)) + } else { + vlStrings = append(vlStrings, vl) + } } } return fmt.Sprintf( |