fix: do not throw when defining a global named __defineSetter__

It replaced {} with `Object.create(null)` to avoid accessing
properties on the Object prototype.

fixes #18363

lib/source-code/source-code.js

@@ -1063,7 +1063,7 @@ class SourceCode extends TokenStore {
  * https://github.com/eslint/eslint/issues/16302
  */
  const configGlobals = Object.assign(
- {},
+ Object.create(null), // https://github.com/eslint/eslint/issues/18363
  getGlobalsForEcmaVersion(languageOptions.ecmaVersion),
  languageOptions.sourceType === "commonjs" ? globals.commonjs : void 0,
  languageOptions.globals

tests/lib/linter/linter.js

@@ -10310,6 +10310,38 @@ describe("Linter with FlatConfigArray", () => {
  linter.verify(code, config);
  assert(spy && spy.calledOnce);
  });
+
+ // https://github.com/eslint/eslint/issues/18363
+ it("not throw when defining a global named __defineSetter__", () => {
+ const code = "/*global __defineSetter__*/";
+ let spy;
+
+ const config = {
+ plugins: {
+ test: {
+ rules: {
+ checker: {
+ create(context) {
+ spy = sinon.spy(node => {
+ const scope = context.sourceCode.getScope(node);
+ const def = getVariable(scope, "__defineSetter__");
+
+ assert.strictEqual(def.name, "__defineSetter__");
+ assert.strictEqual(def.writeable, false);
+ });
+
+ return { Program: spy };
+ }
+ }
+ }
+ }
+ },
+ rules: { "test/checker": "error" }
+ };
+
+ linter.verify(code, config);
+ assert(spy && spy.calledOnce);
+ });
  });
 
  describe("when evaluating code containing a /*global */ block with sloppy whitespace", () => {