Guard against no pages in the HAR (#4430)

lib/plugins/domains/aggregator.js

@@ -80,40 +80,45 @@ export class DomainsAggregator {
     if (this.groups[mainDomain] === undefined) {
       this.groups[mainDomain] = {};
     }
-    const firstPageId = har.log.pages[0].id;
 
-    for (const entry of har.log.entries) {
+    if (har.log.pages.length > 0) {
-      if (entry.pageref !== firstPageId) {
+      const firstPageId = har.log.pages[0].id;
-        // Only pick the first request out of multiple runs.
-        continue;
-      }
 
-      const domainName = parseDomainName(entry.request.url),
+      for (const entry of har.log.entries) {
-        domain = this.domains[domainName] || getDomain(domainName),
+        if (entry.pageref !== firstPageId) {
-        groupDomain =
+          // Only pick the first request out of multiple runs.
-          this.groups[mainDomain][domainName] || getDomain(domainName),
+          continue;
-        totalTime = entry.time;
-
-      domain.requestCount++;
-      groupDomain.requestCount++;
-
-      if (isValidTiming(totalTime)) {
-        domain.totalTime.push(totalTime);
-        groupDomain.totalTime.push(totalTime);
-      } else {
-        log.debug('Missing time from har entry for url: ' + entry.request.url);
-      }
-
-      for (const name of timingNames) {
-        const timing = entry.timings[name];
-
-        if (isValidTiming(timing)) {
-          domain[name].push(timing);
-          groupDomain[name].push(timing);
         }
+
+        const domainName = parseDomainName(entry.request.url),
+          domain = this.domains[domainName] || getDomain(domainName),
+          groupDomain =
+            this.groups[mainDomain][domainName] || getDomain(domainName),
+          totalTime = entry.time;
+
+        domain.requestCount++;
+        groupDomain.requestCount++;
+
+        if (isValidTiming(totalTime)) {
+          domain.totalTime.push(totalTime);
+          groupDomain.totalTime.push(totalTime);
+        } else {
+          log.debug(
+            'Missing time from har entry for url: ' + entry.request.url
+          );
+        }
+
+        for (const name of timingNames) {
+          const timing = entry.timings[name];
+
+          if (isValidTiming(timing)) {
+            domain[name].push(timing);
+            groupDomain[name].push(timing);
+          }
+        }
+        this.domains[domainName] = domain;
+        this.groups[mainDomain][domainName] = groupDomain;
       }
-      this.domains[domainName] = domain;
-      this.groups[mainDomain][domainName] = groupDomain;
     }
   }
   summarize() {