fix: Prevent parser indexer not letting other addon errors to throw

src/indexer/index.ts

@@ -9,6 +9,7 @@ import {
 } from '#utils/error/parser/extract/svelte';
 import { LegacyTemplateNotEnabledError } from '#utils/error/legacy-api/index';
 import { NoDestructuredDefineMetaCallError } from '#utils/error/parser/analyse/define-meta';
+import { isStorybookSvelteCSFError } from '#utils/error';
 
 export const createIndexer = (legacyTemplate: boolean): Indexer => ({
   test: /\.svelte$/,
@@ -39,6 +40,11 @@ export const createIndexer = (legacyTemplate: boolean): Indexer => ({
         throw new LegacyTemplateNotEnabledError(filename);
       }
 
+      // WARN: We can't use instance of `StorybookSvelteCSFError`, because is an _abstract_ class :sob:
+      if (isStorybookSvelteCSFError(error)) {
+        throw error;
+      }
+
       throw new IndexerParseError();
     }
   },

src/utils/error.ts

@@ -80,7 +80,7 @@ export abstract class StorybookSvelteCSFError extends Error {
    * Generates the error message along with additional documentation link (if applicable).
    */
   get message() {
-    if(this.customMessage) {
+    if (this.customMessage) {
       return this.customMessage;
     }
 
@@ -178,3 +178,18 @@ export abstract class StorybookSvelteCSFError extends Error {
     return `<Story name="${this.storyNameFromAttribute}" />`;
   }
 }
+
+// WARN: We can't use instance of `StorybookSvelteCSFError`, because is an _abstract_ class :sob:
+export function isStorybookSvelteCSFError(error: unknown) {
+  if (typeof error !== 'object' || error === null) {
+    return false;
+  }
+
+  for (const key of ['category', 'code', 'data', 'documentation', 'fullErrorCode', 'template']) {
+    if (!Object.hasOwn(error, key)) {
+      return false;
+    }
+  }
+
+  return true;
+}