Fix error during HAR error error logging

Some errors here seemingly don't have this 'errors' property (presumably
they have some other cause) and so this throws a different error
instead. We now check that more cautiously, and throw the original real
error instead.

Author: pimterry

custom-typings/har-validator.d.ts

@@ -2,7 +2,7 @@ declare module 'har-validator' {
     import * as HarFormat from 'har-format';
     import * as Ajv from 'ajv';
 
-    export type HarParseError = Ajv.ValidationError;
+    export type HarParseError = Partial<Ajv.ValidationError>;
 
     export function har(data: unknown): Promise<HarFormat.Har>;
 }

src/model/events/events-store.ts

@@ -623,9 +623,13 @@ export class EventsStore {
             // Log all suberrors, for easier reporting & debugging.
             // This does not include HAR data - only schema errors like
             // 'bodySize is missing' at 'entries[1].request'
-            harParseError.errors.forEach((error) => {
-                console.log(error);
-            });
+            if (harParseError.errors) {
+                harParseError.errors.forEach((error) => {
+                    console.log(error);
+                });
+            } else {
+                console.log(harParseError);
+            }
             throw harParseError;
         });