.projenrc.ts

@@ -174,6 +174,7 @@ function transitiveToolkitPackages(thisPkg: string) {
     '@aws-cdk/tmp-toolkit-helpers',
     '@aws-cdk/cloud-assembly-schema',
     '@aws-cdk/cloudformation-diff',
+    '@aws-cdk/toolkit-lib',
   ];
 
   return transitiveFeaturesAndFixes(thisPkg, toolkitPackages.filter(name => name !== thisPkg));

packages/@aws-cdk/toolkit-lib/lib/api/cloud-assembly/cached-source.ts

@@ -1,3 +1,4 @@
+import '../../private/dispose-polyfill';
 import type * as cxapi from '@aws-cdk/cx-api';
 import { BorrowedAssembly } from './private/borrowed-assembly';
 import type { ICloudAssemblySource, IReadableCloudAssembly } from './types';

packages/@aws-cdk/toolkit-lib/lib/api/cloud-assembly/private/borrowed-assembly.ts

@@ -1,3 +1,4 @@
+import '../../../private/dispose-polyfill';
 import type * as cxapi from '@aws-cdk/cx-api';
 import type { IReadableCloudAssembly } from '../types';
 

packages/@aws-cdk/toolkit-lib/lib/api/cloud-assembly/private/prepare-source.ts

@@ -1,3 +1,4 @@
+import '../../../private/dispose-polyfill';
 import * as os from 'node:os';
 import * as path from 'node:path';
 import { format } from 'node:util';

packages/@aws-cdk/toolkit-lib/lib/api/cloud-assembly/private/stack-assembly.ts

@@ -1,3 +1,4 @@
+import '../../../private/dispose-polyfill';
 import { major } from 'semver';
 import type { IoHelper } from '../../shared-private';
 import { BaseStackAssembly, StackCollection, ExtendedStackSelection as CliExtendedStackSelection } from '../../shared-private';
@@ -6,11 +7,6 @@ import type { StackSelector } from '../stack-selector';
 import { ExpandStackSelection, StackSelectionStrategy } from '../stack-selector';
 import type { IReadableCloudAssembly } from '../types';
 
-if (!Symbol.asyncDispose) {
-  // eslint-disable-next-line @cdklabs/no-throw-default-error
-  throw new Error('Symbol.asyncDispose is not defined on the current JavaScript platform!');
-}
-
 /**
  * A single Cloud Assembly wrapped to provide additional stack operations.
  */

packages/@aws-cdk/toolkit-lib/lib/toolkit/toolkit.ts

@@ -1,3 +1,4 @@
+import '../private/dispose-polyfill';
 import * as path from 'node:path';
 import type { TemplateDiff } from '@aws-cdk/cloudformation-diff';
 import * as cxapi from '@aws-cdk/cx-api';