fixup! esm: fallback to getSource when load returns nullish source

lib/internal/modules/esm/translators.js

@@ -60,9 +60,13 @@ const { internalCompileFunction } = require('internal/vm');
 
 // Lazy-loading to avoid circular dependencies.
 let getSourceSync;
+/**
+ * @param {Parameters<typeof import('./load').getSourceSync>[0]} url
+ * @returns {ReturnType<typeof import('./load').getSourceSync>}
+ */
 function getSource(url) {
   getSourceSync ??= require('internal/modules/esm/load').getSourceSync;
-  return getSourceSync(url).source;
+  return getSourceSync(url);
 }
 
 /** @type {import('deps/cjs-module-lexer/lexer.js').parse} */
@@ -283,7 +287,8 @@ function createCJSModuleWrap(url, source, isMain, loadCJS = loadCJSModule) {
   debug(`Translating CJSModule ${url}`);
 
   const filename = StringPrototypeStartsWith(url, 'file://') ? fileURLToPath(url) : url;
-  source = stringify(source ?? getSource(new URL(url)));
+  // In case the source was not provided by the `load` step, we need fetch it now.
+  source = stringify(source ?? getSource(new URL(url)).source);
 
   const { exportNames, module } = cjsPreparseModuleExports(filename, source);
   cjsCache.set(url, module);