Improve stack trace detector regex

Author: Ricardo Lüders

pkg/gather/clusterconfig/operators_pods_and_events.go

@@ -39,7 +39,7 @@ type CompactedEventList struct {
 }
 
 // Used to detect the possible stack trace on logs
-var stackTraceRegex = regexp.MustCompile(`((.*)(/{0,9}){0,9}).([0-9]{0,9})`)
+var stackTraceRegex = regexp.MustCompile(`.*/[^/]*:\d+.*0[xX][0-9a-fA-F]+`)
 
 // GatherClusterOperatorPodsAndEvents collects information about all pods
 // and events from namespaces of degraded cluster operators. The collected
@@ -272,7 +272,7 @@ func getContainerLogs(ctx context.Context,
 
 		// check for stack tracer
 		if found := stackTraceRegex.MatchString(logString); found {
-			klog.V(2).Infof("Stack trace found in log. Fetching the complete log for %s container in namespace %s (previous: %v).", c.Name, pod.Name, pod.Namespace, isPrevious)
+			klog.V(2).Infof("Stack trace found in log. Fetching the complete log for %s container %s pod in namespace %s (previous: %v).", c.Name, pod.Name, pod.Namespace, isPrevious)
 			fullLog, err := getContainerLogString(ctx, client, pod, c.Name, isPrevious, nil)
 			if err != nil {
 				klog.V(2).Infof("Error: %q", err)