fix: worker processes breaking sessions when attaching multiple times

Fixes microsoft/vscode#124045

Author: connor4312

CHANGELOG.md

@@ -15,6 +15,7 @@ This changelog records changes to stable releases since 1.50.2. "TBA" changes he
 - fix: intermittent debug failures with browsers, especially Electron ([ref](https://github.com/microsoft/vscode/issues/123420)))
 - fix: add additional languages for browser debugging ([ref](https://github.com/microsoft/vscode/issues/123484))
 - feat: allow limited adjustment of launch config options during restart ([ref](https://github.com/microsoft/vscode/issues/118196))
+- fix: worker processes breaking sessions when attaching multiple times ([ref](https://github.com/microsoft/vscode/issues/124045))
 
 ## v1.56 (April 2021)
 

src/targets/node/nodeLauncherBase.ts

@@ -421,7 +421,7 @@ export abstract class NodeLauncherBase<T extends AnyNodeConfiguration> implement
           attached: true,
           canAccessOpener: false,
           type: 'node-worker',
-          targetId: evt.sessionId,
+          targetId: `${parent.id()}-${evt.sessionId}`,
           title: evt.workerInfo.title,
           url: evt.workerInfo.url,
           openerId: parent.id(),