Merge branch 'master' into markm-assertion-breakpoint

Author: erights

packages/compartment-mapper/src/parse-cjs-shared-export-wrapper.js

@@ -182,6 +182,26 @@ export const wrap = ({
     });
   }
 
+  // stub implementation of require.extensions
+  const requireExtensions = create(null);
+  const fail = freeze(
+    /**
+     * @param {NodeJS.Module} _module
+     * @param {string} _filename
+     * @returns {any}
+     */
+    (_module, _filename) => {
+      throw Error('Not implemented');
+    },
+  );
+  requireExtensions['.js'] = fail;
+  requireExtensions['.json'] = fail;
+  requireExtensions['.node'] = fail;
+  freeze(requireExtensions);
+  require.extensions = /** @type {NodeJS.Require['extensions']} */ (
+    requireExtensions
+  );
+
   freeze(require);
 
   const afterExecute = () => {

packages/compartment-mapper/test/cjs-compat.test.js

@@ -27,6 +27,7 @@ const assertFixture = (t, { namespace, testCategoryHint }) => {
   assertions.moduleWithCycle();
   assertions.defaultChangesAfterExec();
   assertions.packageNestedFile();
+  assertions.requireExtensions();
 
   if (testCategoryHint === 'Location') {
     t.deepEqual(results.requireResolvePaths, [