don't swallow anything that isn't a request error

src/matrix/storage/idb/Store.ts

@@ -178,8 +178,10 @@ export class Store<T> extends QueryTarget<T> {
             if (err instanceof IDBRequestError) {
                 log.log({l: "could not write", id: this._getKey(value), e: err}, log.level.Warn);
                 err.preventTransactionAbort();
-            }
                 return false;
+            } else {
+                throw err;
+            }
         }
     }