fix: do not throw when defining a global named __defineSetter__

lib/linter/linter.js

@@ -775,7 +775,7 @@ function createLanguageOptions({ globals: configuredGlobals, parser, parserOptio
  */
 function resolveGlobals(providedGlobals, enabledEnvironments) {
  return Object.assign(
- {},
+ Object.create(null),
  ...enabledEnvironments.filter(env => env.globals).map(env => env.globals),
  providedGlobals
  );

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

@@ -10250,6 +10250,48 @@ describe("Linter with FlatConfigArray", () => {
 
  describe("when evaluating code containing /*global */ and /*globals */ blocks", () => {
 
+ /**
+ * Asserts the global variables in the provided code using the specified language options and data.
+ * @param {string} code The code to verify.
+ * @param {Object} languageOptions The language options to use.
+ * @param {Object} [data={}] Additional data for the assertion.
+ * @returns {void}
+ */
+ function assertGlobalVariable(code, languageOptions, data = {}) {
+ let spy;
+
+ const config = {
+ plugins: {
+ test: {
+ rules: {
+ checker: {
+ create(context) {
+ spy = sinon.spy(node => {
+ const scope = context.sourceCode.getScope(node);
+ const g = getVariable(scope, data.name);
+
+ assert.strictEqual(g.name, data.name);
+ assert.strictEqual(g.writeable, data.writeable);
+ });
+
+ return { Program: spy };
+ }
+ }
+ }
+ }
+ },
+ rules: { "test/checker": "error" }
+ };
+
+ if (languageOptions !== void 0) {
+ config.languageOptions = languageOptions;
+ }
+
+ linter.verify(code, config);
+ assert(spy && spy.calledOnce);
+
+ }
+
  it("variables should be available in global scope", () => {
  const code = `
  /*global a b:true c:false d:readable e:writeable Math:off */
@@ -10310,6 +10352,15 @@ 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__", () => {
+ assertGlobalVariable("/*global __defineSetter__ */", {}, { name: "__defineSetter__", writeable: false });
+ assertGlobalVariable("/*global __defineSetter__ */", void 0, { name: "__defineSetter__", writeable: false });
+ assertGlobalVariable("/*global __defineSetter__ */", { globals: { __defineSetter__: "off" } }, { name: "__defineSetter__", writeable: false });
+ assertGlobalVariable("/*global __defineSetter__ */", { globals: { __defineSetter__: "writeable" } }, { name: "__defineSetter__", writeable: false });
+ assertGlobalVariable("/*global __defineSetter__:writeable */", {}, { name: "__defineSetter__", writeable: true });
+ });
  });
 
  describe("when evaluating code containing a /*global */ block with sloppy whitespace", () => {