Update generated code of getInteropBlock() to work with null prototyp…

…e objects (#3420) Co-authored-by: Lukas Taegert-Atkinson <lukastaegert@users.noreply.github.com>
rollup · Mar 6, 2020 · eeda078 · eeda078
1 parent 85c54ee
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diff --git a/src/finalisers/shared/getInteropBlock.ts b/src/finalisers/shared/getInteropBlock.ts
@@ -20,7 +20,7 @@ export default function getInteropBlock(
 			}
 
 			return (
-				`${name}${_}=${_}${name}${_}&&${_}${name}.hasOwnProperty('default')${_}?` +
+				`${name}${_}=${_}${name}${_}&&${_}Object.prototype.hasOwnProperty.call(${name},${_}'default')${_}?` +
 				`${_}${name}['default']${_}:${_}${name};`
 			);
 		})

diff --git a/test/chunking-form/samples/avoid-chunk-import-hoisting/_expected/amd/generated-dep.js b/test/chunking-form/samples/avoid-chunk-import-hoisting/_expected/amd/generated-dep.js
@@ -1,6 +1,6 @@
 define(['exports', 'lib'], function (exports, value) { 'use strict';
 
-	value = value && value.hasOwnProperty('default') ? value['default'] : value;
+	value = value && Object.prototype.hasOwnProperty.call(value, 'default') ? value['default'] : value;
 
 	var dep = 2 * value;
 

diff --git a/...form/samples/preserve-modules-commonjs/_expected/amd/_virtual/_external_commonjs-external b/...form/samples/preserve-modules-commonjs/_expected/amd/_virtual/_external_commonjs-external
@@ -1,6 +1,6 @@
 define(['external'], function (external) { 'use strict';
 
-	external = external && external.hasOwnProperty('default') ? external['default'] : external;
+	external = external && Object.prototype.hasOwnProperty.call(external, 'default') ? external['default'] : external;
 
 
 

diff --git a/test/chunking-form/samples/preserve-modules-commonjs/_expected/amd/commonjs.js b/test/chunking-form/samples/preserve-modules-commonjs/_expected/amd/commonjs.js
@@ -1,6 +1,6 @@
 define(['exports', 'external', './other', './_virtual/_external_commonjs-external', './_virtual/other.js_commonjs-proxy'], function (exports, external, other, _external_commonjsExternal, other$1) { 'use strict';
 
-	external = external && external.hasOwnProperty('default') ? external['default'] : external;
+	external = external && Object.prototype.hasOwnProperty.call(external, 'default') ? external['default'] : external;
 
 	const { value } = other$1;
 

diff --git a/test/chunking-form/samples/preserve-modules-commonjs/_expected/amd/main.js b/test/chunking-form/samples/preserve-modules-commonjs/_expected/amd/main.js
@@ -1,6 +1,6 @@
 define(['external', './commonjs'], function (external, commonjs) { 'use strict';
 
-	external = external && external.hasOwnProperty('default') ? external['default'] : external;
+	external = external && Object.prototype.hasOwnProperty.call(external, 'default') ? external['default'] : external;
 
 	console.log(commonjs.default, external);
 

diff --git a/test/form/samples/compact/_expected/amd.js b/test/form/samples/compact/_expected/amd.js
@@ -1,6 +1,6 @@
-define(['external'],function(x){'use strict';x=x&&x.hasOwnProperty('default')?x['default']:x;var self=/*#__PURE__*/Object.freeze({[Symbol.toStringTag]:'Module',__proto__:null,get default(){return foo}});console.log(self);
+define(['external'],function(x){'use strict';x=x&&Object.prototype.hasOwnProperty.call(x,'default')?x['default']:x;var self=/*#__PURE__*/Object.freeze({[Symbol.toStringTag]:'Module',__proto__:null,get default(){return foo}});console.log(self);
 function foo () {
 	console.log( x );
 }
 // trailing comment
-return foo;});
+return foo;});
diff --git a/test/form/samples/compact/_expected/iife.js b/test/form/samples/compact/_expected/iife.js
@@ -1,6 +1,6 @@
-var foo=(function(x){'use strict';x=x&&x.hasOwnProperty('default')?x['default']:x;var self=/*#__PURE__*/Object.freeze({[Symbol.toStringTag]:'Module',__proto__:null,get default(){return foo}});console.log(self);
+var foo=(function(x){'use strict';x=x&&Object.prototype.hasOwnProperty.call(x,'default')?x['default']:x;var self=/*#__PURE__*/Object.freeze({[Symbol.toStringTag]:'Module',__proto__:null,get default(){return foo}});console.log(self);
 function foo () {
 	console.log( x );
 }
 // trailing comment
-return foo;}(x));
+return foo;}(x));
diff --git a/test/form/samples/compact/_expected/umd.js b/test/form/samples/compact/_expected/umd.js
@@ -1,4 +1,4 @@
-(function(g,f){typeof exports==='object'&&typeof module!=='undefined'?module.exports=f(require('external')):typeof define==='function'&&define.amd?define(['external'],f):(g=g||self,g.foo=f(g.x));}(this,(function(x){'use strict';x=x&&x.hasOwnProperty('default')?x['default']:x;var self=/*#__PURE__*/Object.freeze({[Symbol.toStringTag]:'Module',__proto__:null,get default(){return foo}});console.log(self);
+(function(g,f){typeof exports==='object'&&typeof module!=='undefined'?module.exports=f(require('external')):typeof define==='function'&&define.amd?define(['external'],f):(g=g||self,g.foo=f(g.x));}(this,(function(x){'use strict';x=x&&Object.prototype.hasOwnProperty.call(x,'default')?x['default']:x;var self=/*#__PURE__*/Object.freeze({[Symbol.toStringTag]:'Module',__proto__:null,get default(){return foo}});console.log(self);
 function foo () {
 	console.log( x );
 }

diff --git a/test/form/samples/deconflict-format-specific-globals/_expected/amd.js b/test/form/samples/deconflict-format-specific-globals/_expected/amd.js
@@ -19,7 +19,7 @@ define(['module', 'require', 'external'], function (module, require, external) {
 		}
 	}
 
-	external = external && external.hasOwnProperty('default') ? external['default'] : external;
+	external = external && Object.prototype.hasOwnProperty.call(external, 'default') ? external['default'] : external;
 
 	console.log(external);
 

diff --git a/test/form/samples/deconflict-format-specific-globals/_expected/iife.js b/test/form/samples/deconflict-format-specific-globals/_expected/iife.js
@@ -1,7 +1,7 @@
 var bundle = (function (external) {
 	'use strict';
 
-	external = external && external.hasOwnProperty('default') ? external['default'] : external;
+	external = external && Object.prototype.hasOwnProperty.call(external, 'default') ? external['default'] : external;
 
 	console.log(external);
 

diff --git a/test/form/samples/deconflict-format-specific-globals/_expected/umd.js b/test/form/samples/deconflict-format-specific-globals/_expected/umd.js
@@ -4,7 +4,7 @@
 	(global = global || self, global.bundle = factory(global.external));
 }(this, (function (external) { 'use strict';
 
-	external = external && external.hasOwnProperty('default') ? external['default'] : external;
+	external = external && Object.prototype.hasOwnProperty.call(external, 'default') ? external['default'] : external;
 
 	console.log(external);
 

diff --git a/test/form/samples/export-default-import/_expected/amd.js b/test/form/samples/export-default-import/_expected/amd.js
@@ -1,6 +1,6 @@
 define(['exports', 'x'], function (exports, x) { 'use strict';
 
-	x = x && x.hasOwnProperty('default') ? x['default'] : x;
+	x = x && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
 
 
 

diff --git a/test/form/samples/export-default-import/_expected/iife.js b/test/form/samples/export-default-import/_expected/iife.js
@@ -1,7 +1,7 @@
 var myBundle = (function (exports, x) {
 	'use strict';
 
-	x = x && x.hasOwnProperty('default') ? x['default'] : x;
+	x = x && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
 
 
 

diff --git a/test/form/samples/export-default-import/_expected/umd.js b/test/form/samples/export-default-import/_expected/umd.js
@@ -4,7 +4,7 @@
 	(global = global || self, factory(global.myBundle = {}, global.x));
 }(this, (function (exports, x) { 'use strict';
 
-	x = x && x.hasOwnProperty('default') ? x['default'] : x;
+	x = x && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
 
 
 

diff --git a/test/form/samples/external-deshadowing/_expected/amd.js b/test/form/samples/external-deshadowing/_expected/amd.js
@@ -1,6 +1,6 @@
 define(['exports', 'a', 'b'], function (exports, a, Test$1) { 'use strict';
 
-  Test$1 = Test$1 && Test$1.hasOwnProperty('default') ? Test$1['default'] : Test$1;
+  Test$1 = Test$1 && Object.prototype.hasOwnProperty.call(Test$1, 'default') ? Test$1['default'] : Test$1;
 
   const Test = () => {
     console.log(a.Test);

diff --git a/test/form/samples/external-deshadowing/_expected/iife.js b/test/form/samples/external-deshadowing/_expected/iife.js
@@ -1,7 +1,7 @@
 var myBundle = (function (exports, a, Test$1) {
   'use strict';
 
-  Test$1 = Test$1 && Test$1.hasOwnProperty('default') ? Test$1['default'] : Test$1;
+  Test$1 = Test$1 && Object.prototype.hasOwnProperty.call(Test$1, 'default') ? Test$1['default'] : Test$1;
 
   const Test = () => {
     console.log(a.Test);

diff --git a/test/form/samples/external-deshadowing/_expected/umd.js b/test/form/samples/external-deshadowing/_expected/umd.js
@@ -4,7 +4,7 @@
   (global = global || self, factory(global.myBundle = {}, global.a, global.b));
 }(this, (function (exports, a, Test$1) { 'use strict';
 
-  Test$1 = Test$1 && Test$1.hasOwnProperty('default') ? Test$1['default'] : Test$1;
+  Test$1 = Test$1 && Object.prototype.hasOwnProperty.call(Test$1, 'default') ? Test$1['default'] : Test$1;
 
   const Test = () => {
     console.log(a.Test);

diff --git a/test/form/samples/external-imports-custom-names/_expected/amd.js b/test/form/samples/external-imports-custom-names/_expected/amd.js
@@ -1,6 +1,6 @@
 define(['jquery'], function ($) { 'use strict';
 
-	$ = $ && $.hasOwnProperty('default') ? $['default'] : $;
+	$ = $ && Object.prototype.hasOwnProperty.call($, 'default') ? $['default'] : $;
 
 	$( function () {
 		$( 'body' ).html( '<h1>hello world!</h1>' );

diff --git a/test/form/samples/external-imports-custom-names/_expected/iife.js b/test/form/samples/external-imports-custom-names/_expected/iife.js
@@ -1,7 +1,7 @@
 (function ($) {
 	'use strict';
 
-	$ = $ && $.hasOwnProperty('default') ? $['default'] : $;
+	$ = $ && Object.prototype.hasOwnProperty.call($, 'default') ? $['default'] : $;
 
 	$( function () {
 		$( 'body' ).html( '<h1>hello world!</h1>' );

diff --git a/test/form/samples/external-imports-custom-names/_expected/umd.js b/test/form/samples/external-imports-custom-names/_expected/umd.js
@@ -4,7 +4,7 @@
 	(global = global || self, factory(global.jQuery));
 }(this, (function ($) { 'use strict';
 
-	$ = $ && $.hasOwnProperty('default') ? $['default'] : $;
+	$ = $ && Object.prototype.hasOwnProperty.call($, 'default') ? $['default'] : $;
 
 	$( function () {
 		$( 'body' ).html( '<h1>hello world!</h1>' );

diff --git a/test/form/samples/external-imports/_expected/amd.js b/test/form/samples/external-imports/_expected/amd.js
@@ -1,6 +1,6 @@
 define(['factory', 'baz', 'shipping-port', 'alphabet'], function (factory, baz, containers, alphabet) { 'use strict';
 
-	factory = factory && factory.hasOwnProperty('default') ? factory['default'] : factory;
+	factory = factory && Object.prototype.hasOwnProperty.call(factory, 'default') ? factory['default'] : factory;
 	var alphabet__default = 'default' in alphabet ? alphabet['default'] : alphabet;
 
 	factory( null );

diff --git a/test/form/samples/external-imports/_expected/iife.js b/test/form/samples/external-imports/_expected/iife.js
@@ -1,7 +1,7 @@
 (function (factory, baz, containers, alphabet) {
 	'use strict';
 
-	factory = factory && factory.hasOwnProperty('default') ? factory['default'] : factory;
+	factory = factory && Object.prototype.hasOwnProperty.call(factory, 'default') ? factory['default'] : factory;
 	var alphabet__default = 'default' in alphabet ? alphabet['default'] : alphabet;
 
 	factory( null );

diff --git a/test/form/samples/external-imports/_expected/umd.js b/test/form/samples/external-imports/_expected/umd.js
@@ -4,7 +4,7 @@
 	(global = global || self, factory(global.factory, global.baz, global.containers, global.alphabet));
 }(this, (function (factory, baz, containers, alphabet) { 'use strict';
 
-	factory = factory && factory.hasOwnProperty('default') ? factory['default'] : factory;
+	factory = factory && Object.prototype.hasOwnProperty.call(factory, 'default') ? factory['default'] : factory;
 	var alphabet__default = 'default' in alphabet ? alphabet['default'] : alphabet;
 
 	factory( null );

diff --git a/test/form/samples/guessed-global-names/_expected/amd.js b/test/form/samples/guessed-global-names/_expected/amd.js
@@ -1,6 +1,6 @@
 define(['unchanged', 'changed', 'special-character', 'with/slash', './relative'], function (unchanged, changedName, specialCharacter, slash, relative_js) { 'use strict';
 
-	changedName = changedName && changedName.hasOwnProperty('default') ? changedName['default'] : changedName;
+	changedName = changedName && Object.prototype.hasOwnProperty.call(changedName, 'default') ? changedName['default'] : changedName;
 
 	console.log(unchanged.foo, changedName, specialCharacter.bar, slash.baz, relative_js.quux);
 

diff --git a/test/form/samples/guessed-global-names/_expected/iife.js b/test/form/samples/guessed-global-names/_expected/iife.js
@@ -1,7 +1,7 @@
 (function (unchanged, changedName, specialCharacter, slash, relative_js) {
 	'use strict';
 
-	changedName = changedName && changedName.hasOwnProperty('default') ? changedName['default'] : changedName;
+	changedName = changedName && Object.prototype.hasOwnProperty.call(changedName, 'default') ? changedName['default'] : changedName;
 
 	console.log(unchanged.foo, changedName, specialCharacter.bar, slash.baz, relative_js.quux);
 

diff --git a/test/form/samples/guessed-global-names/_expected/umd.js b/test/form/samples/guessed-global-names/_expected/umd.js
@@ -4,7 +4,7 @@
 	(global = global || self, factory(global.unchanged, global.changedName, global.specialCharacter, global.slash, global.relative_js));
 }(this, (function (unchanged, changedName, specialCharacter, slash, relative_js) { 'use strict';
 
-	changedName = changedName && changedName.hasOwnProperty('default') ? changedName['default'] : changedName;
+	changedName = changedName && Object.prototype.hasOwnProperty.call(changedName, 'default') ? changedName['default'] : changedName;
 
 	console.log(unchanged.foo, changedName, specialCharacter.bar, slash.baz, relative_js.quux);
 

diff --git a/test/form/samples/paths-function/_expected/amd.js b/test/form/samples/paths-function/_expected/amd.js
@@ -1,6 +1,6 @@
 define(['https://unpkg.com/foo'], function (foo) { 'use strict';
 
-	foo = foo && foo.hasOwnProperty('default') ? foo['default'] : foo;
+	foo = foo && Object.prototype.hasOwnProperty.call(foo, 'default') ? foo['default'] : foo;
 
 	assert.equal( foo, 42 );
 

diff --git a/test/form/samples/paths-function/_expected/iife.js b/test/form/samples/paths-function/_expected/iife.js
@@ -1,7 +1,7 @@
 (function (foo) {
 	'use strict';
 
-	foo = foo && foo.hasOwnProperty('default') ? foo['default'] : foo;
+	foo = foo && Object.prototype.hasOwnProperty.call(foo, 'default') ? foo['default'] : foo;
 
 	assert.equal( foo, 42 );
 

diff --git a/test/form/samples/paths-function/_expected/umd.js b/test/form/samples/paths-function/_expected/umd.js
@@ -4,7 +4,7 @@
 	(global = global || self, factory(global.foo));
 }(this, (function (foo) { 'use strict';
 
-	foo = foo && foo.hasOwnProperty('default') ? foo['default'] : foo;
+	foo = foo && Object.prototype.hasOwnProperty.call(foo, 'default') ? foo['default'] : foo;
 
 	assert.equal( foo, 42 );
 

diff --git a/test/form/samples/paths-relative/_expected/amd.js b/test/form/samples/paths-relative/_expected/amd.js
@@ -1,6 +1,6 @@
 define(['../foo'], function (foo) { 'use strict';
 
-	foo = foo && foo.hasOwnProperty('default') ? foo['default'] : foo;
+	foo = foo && Object.prototype.hasOwnProperty.call(foo, 'default') ? foo['default'] : foo;
 
 	assert.equal( foo, 42 );
 

diff --git a/test/form/samples/paths-relative/_expected/iife.js b/test/form/samples/paths-relative/_expected/iife.js
@@ -1,7 +1,7 @@
 (function (foo) {
 	'use strict';
 
-	foo = foo && foo.hasOwnProperty('default') ? foo['default'] : foo;
+	foo = foo && Object.prototype.hasOwnProperty.call(foo, 'default') ? foo['default'] : foo;
 
 	assert.equal( foo, 42 );
 

diff --git a/test/form/samples/paths-relative/_expected/umd.js b/test/form/samples/paths-relative/_expected/umd.js
@@ -4,7 +4,7 @@
 	(global = global || self, factory(global.foo));
 }(this, (function (foo) { 'use strict';
 
-	foo = foo && foo.hasOwnProperty('default') ? foo['default'] : foo;
+	foo = foo && Object.prototype.hasOwnProperty.call(foo, 'default') ? foo['default'] : foo;
 
 	assert.equal( foo, 42 );
 

diff --git a/test/form/samples/paths/_expected/amd.js b/test/form/samples/paths/_expected/amd.js
@@ -1,6 +1,6 @@
 define(['https://unpkg.com/foo'], function (foo) { 'use strict';
 
-	foo = foo && foo.hasOwnProperty('default') ? foo['default'] : foo;
+	foo = foo && Object.prototype.hasOwnProperty.call(foo, 'default') ? foo['default'] : foo;
 
 	assert.equal( foo, 42 );
 

diff --git a/test/form/samples/paths/_expected/iife.js b/test/form/samples/paths/_expected/iife.js
@@ -1,7 +1,7 @@
 (function (foo) {
 	'use strict';
 
-	foo = foo && foo.hasOwnProperty('default') ? foo['default'] : foo;
+	foo = foo && Object.prototype.hasOwnProperty.call(foo, 'default') ? foo['default'] : foo;
 
 	assert.equal( foo, 42 );
 

diff --git a/test/form/samples/paths/_expected/umd.js b/test/form/samples/paths/_expected/umd.js
@@ -4,7 +4,7 @@
 	(global = global || self, factory(global.foo));
 }(this, (function (foo) { 'use strict';
 
-	foo = foo && foo.hasOwnProperty('default') ? foo['default'] : foo;
+	foo = foo && Object.prototype.hasOwnProperty.call(foo, 'default') ? foo['default'] : foo;
 
 	assert.equal( foo, 42 );
 

diff --git a/test/form/samples/reexport-external-default-and-name/_expected/amd.js b/test/form/samples/reexport-external-default-and-name/_expected/amd.js
@@ -1,6 +1,6 @@
 define(['exports', 'external'], function (exports, external) { 'use strict';
 
-	external = external && external.hasOwnProperty('default') ? external['default'] : external;
+	external = external && Object.prototype.hasOwnProperty.call(external, 'default') ? external['default'] : external;
 
 	const value = 42;
 

diff --git a/test/form/samples/reexport-external-default-and-name/_expected/iife.js b/test/form/samples/reexport-external-default-and-name/_expected/iife.js
@@ -1,7 +1,7 @@
 var bundle = (function (exports, external) {
 	'use strict';
 
-	external = external && external.hasOwnProperty('default') ? external['default'] : external;
+	external = external && Object.prototype.hasOwnProperty.call(external, 'default') ? external['default'] : external;
 
 	const value = 42;
 

diff --git a/test/form/samples/reexport-external-default-and-name/_expected/umd.js b/test/form/samples/reexport-external-default-and-name/_expected/umd.js
@@ -4,7 +4,7 @@
 	(global = global || self, factory(global.bundle = {}, global.external));
 }(this, (function (exports, external) { 'use strict';
 
-	external = external && external.hasOwnProperty('default') ? external['default'] : external;
+	external = external && Object.prototype.hasOwnProperty.call(external, 'default') ? external['default'] : external;
 
 	const value = 42;
 

diff --git a/test/form/samples/reexport-external-default/_expected/amd.js b/test/form/samples/reexport-external-default/_expected/amd.js
@@ -1,6 +1,6 @@
 define(['external1', 'external2'], function (external1, external2) { 'use strict';
 
-	external2 = external2 && external2.hasOwnProperty('default') ? external2['default'] : external2;
+	external2 = external2 && Object.prototype.hasOwnProperty.call(external2, 'default') ? external2['default'] : external2;
 
 	console.log(external1.foo);
 

diff --git a/test/form/samples/reexport-external-default/_expected/iife.js b/test/form/samples/reexport-external-default/_expected/iife.js
@@ -1,7 +1,7 @@
 var bundle = (function (external1, external2) {
 	'use strict';
 
-	external2 = external2 && external2.hasOwnProperty('default') ? external2['default'] : external2;
+	external2 = external2 && Object.prototype.hasOwnProperty.call(external2, 'default') ? external2['default'] : external2;
 
 	console.log(external1.foo);
 

diff --git a/test/form/samples/reexport-external-default/_expected/umd.js b/test/form/samples/reexport-external-default/_expected/umd.js
@@ -4,7 +4,7 @@
 	(global = global || self, global.bundle = factory(global.external1, global.external2));
 }(this, (function (external1, external2) { 'use strict';
 
-	external2 = external2 && external2.hasOwnProperty('default') ? external2['default'] : external2;
+	external2 = external2 && Object.prototype.hasOwnProperty.call(external2, 'default') ? external2['default'] : external2;
 
 	console.log(external1.foo);
 

diff --git a/test/form/samples/relative-external-with-global/_expected/amd.js b/test/form/samples/relative-external-with-global/_expected/amd.js
@@ -1,6 +1,6 @@
 define(['./lib/throttle'], function (throttle) { 'use strict';
 
-	throttle = throttle && throttle.hasOwnProperty('default') ? throttle['default'] : throttle;
+	throttle = throttle && Object.prototype.hasOwnProperty.call(throttle, 'default') ? throttle['default'] : throttle;
 
 	const fn = throttle( () => {
 		console.log( '.' );

diff --git a/test/form/samples/relative-external-with-global/_expected/iife.js b/test/form/samples/relative-external-with-global/_expected/iife.js
@@ -1,7 +1,7 @@
 (function (throttle) {
 	'use strict';
 
-	throttle = throttle && throttle.hasOwnProperty('default') ? throttle['default'] : throttle;
+	throttle = throttle && Object.prototype.hasOwnProperty.call(throttle, 'default') ? throttle['default'] : throttle;
 
 	const fn = throttle( () => {
 		console.log( '.' );

diff --git a/test/form/samples/relative-external-with-global/_expected/umd.js b/test/form/samples/relative-external-with-global/_expected/umd.js
@@ -4,7 +4,7 @@
 	(global = global || self, factory(global.Lib.throttle));
 }(this, (function (throttle) { 'use strict';
 
-	throttle = throttle && throttle.hasOwnProperty('default') ? throttle['default'] : throttle;
+	throttle = throttle && Object.prototype.hasOwnProperty.call(throttle, 'default') ? throttle['default'] : throttle;
 
 	const fn = throttle( () => {
 		console.log( '.' );

diff --git a/test/form/samples/resolve-external-dynamic-imports/_expected/amd.js b/test/form/samples/resolve-external-dynamic-imports/_expected/amd.js
@@ -19,7 +19,7 @@ define(['require', 'exports', 'external'], function (require, exports, myExterna
 		}
 	}
 
-	myExternal = myExternal && myExternal.hasOwnProperty('default') ? myExternal['default'] : myExternal;
+	myExternal = myExternal && Object.prototype.hasOwnProperty.call(myExternal, 'default') ? myExternal['default'] : myExternal;
 
 	const test = () => myExternal;
 

diff --git a/test/form/samples/resolve-external-dynamic-imports/_expected/iife.js b/test/form/samples/resolve-external-dynamic-imports/_expected/iife.js
@@ -1,7 +1,7 @@
 var bundle = (function (exports, myExternal) {
 	'use strict';
 
-	myExternal = myExternal && myExternal.hasOwnProperty('default') ? myExternal['default'] : myExternal;
+	myExternal = myExternal && Object.prototype.hasOwnProperty.call(myExternal, 'default') ? myExternal['default'] : myExternal;
 
 	const test = () => myExternal;