Fixes microsoft#60452: Clarify root cause of exception

alexdima · alexdima · commit f6e5449a70fb · 2018-10-16T13:59:36.000+02:00
diff --git a/src/vs/platform/contextkey/browser/contextKeyService.ts b/src/vs/platform/contextkey/browser/contextKeyService.ts
@@ -294,7 +294,11 @@ export class ContextKeyService extends AbstractContextKeyService implements ICon
 	}
 
 	public getContextValuesContainer(contextId: number): Context {
-		return this._contexts[String(contextId)];
+		let result = this._contexts[String(contextId)];
+		if (!result) {
+			throw new Error(`Child ContextService has been disposed`);
+		}
+		return result;
 	}
 
 	public createChildContext(parentContextId: number = this._myContextId): number {

Original file line number	Diff line number	Diff line change
`@@ -294,7 +294,11 @@ export class ContextKeyService extends AbstractContextKeyService implements ICon`
`294`	`294`	`}`
`295`	`295`
`296`	`296`	`public getContextValuesContainer(contextId: number): Context {`
`297`		`- return this._contexts[String(contextId)];`
	`297`	`+ let result = this._contexts[String(contextId)];`
	`298`	`+ if (!result) {`
	`299`	+ throw new Error(`Child ContextService has been disposed`);
	`300`	`+ }`
	`301`	`+ return result;`
`298`	`302`	`}`
`299`	`303`
`300`	`304`	`public createChildContext(parentContextId: number = this._myContextId): number {`