nodejs
diff --git a/Collapse file
‎lib/internal/modules/esm/loader.js‎
Copy file name to clipboardExpand all lines: lib/internal/modules/esm/loader.js
+4Lines changed: 4 additions & 0 deletions b/Collapse file
‎lib/internal/modules/esm/loader.js‎
Copy file name to clipboardExpand all lines: lib/internal/modules/esm/loader.js
+4Lines changed: 4 additions & 0 deletions
@@ -462,6 +462,10 @@ class ModuleLoader {
     const resolvedImportAttributes = resolveResult.importAttributes ?? importAttributes;
     let job = this.loadCache.get(url, resolvedImportAttributes.type);
     if (job !== undefined) {
+      // TODO(node:55782): this race may stop happening when the ESM resolution and loading become synchronous.
+      if (!job.module) {
+        assert.fail(getRaceMessage(url, parentURL));
+      }
       // This module is being evaluated, which means it's imported in a previous link
       // in a cycle.
       if (job.module.getStatus() === kEvaluating) {