fix: support module expression scopes

eslint/babel-eslint-parser/src/analyze-scope.cjs

@@ -67,12 +67,29 @@ class PatternVisitor extends OriginalPatternVisitor {
 
 class Referencer extends OriginalReferencer {
  #client;
+ visitedTopLevel = false;
 
  constructor(options, scopeManager, client) {
  super(options, scopeManager);
  this.#client = client;
  }
 
+ Program(node) {
+ if (this.visitedTopLevel) {
+ // Program nodes are also currently used nested in module expressions, leading to an error as only one global scope can exist
+ return;
+ }
+
+ this.visitedTopLevel = true;
+ super.Program(node);
+ }
+
+ ModuleExpression(node) {
+ this.scopeManager.__nestModuleScope(node);
+ this.visitChildren(node);
+ this.close(node);
+ }
+
  // inherits.
  visitPattern(node, options, callback) {
  if (!node) {

eslint/babel-eslint-parser/test/index.js

@@ -987,3 +987,19 @@ describe("Babel and Espree", () => {
  });
  });
 });
+
+describe("scope", () => {
+ it("should nest a module scope for module expressions", () => {
+ const code = "(module {})";
+ const options = {
+ babelOptions: { parserOpts: { plugins: ["moduleBlocks"] } },
+ };
+ const { ast, scopeManager } = parseForESLint(code, options);
+ const moduleExpression = ast.body[0].expression;
+ scopeManager.acquire(moduleExpression);
+
+ expect(scopeManager.acquire(moduleExpression)).toMatchObject({
+ type: "module",
+ });
+ });
+});