fix(MongoMemory*::start): add log of the error when async chain throws

Author: hasezoey

packages/mongodb-memory-server-core/src/MongoMemoryReplSet.ts

@@ -362,6 +362,8 @@ export class MongoMemoryReplSet extends EventEmitter implements ManagerAdvanced
           );
         }
 
+        log('ensureAsync chain threw a Error: ', err);
+
         await this.stop(false); // still try to close the instance that was spawned, without cleanup for investigation
 
         this.stateChange(MongoMemoryReplSetStates.stopped);

packages/mongodb-memory-server-core/src/MongoMemoryServer.ts

@@ -285,6 +285,8 @@ export class MongoMemoryServer extends EventEmitter implements ManagerAdvanced {
         );
       }
 
+      this.debug('_startUpInstance threw a Error: ', err);
+
       await this.stop(false); // still try to close the instance that was spawned, without cleanup for investigation
 
       this.stateChange(MongoMemoryServerStates.stopped);