From 6779069b83446ef063cce1e48b617a98a333db60 Mon Sep 17 00:00:00 2001
From: isidor <inikolic@microsoft.com>
Date: Mon, 23 Oct 2017 15:01:27 +0200
Subject: [PATCH] Make sure both composites are known to this composite bar in
 move

---
 src/vs/workbench/browser/parts/compositebar/compositeBar.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/vs/workbench/browser/parts/compositebar/compositeBar.ts b/src/vs/workbench/browser/parts/compositebar/compositeBar.ts
index 7682c32759b..bbc33698401 100644
--- a/src/vs/workbench/browser/parts/compositebar/compositeBar.ts
+++ b/src/vs/workbench/browser/parts/compositebar/compositeBar.ts
@@ -403,6 +403,10 @@ export class CompositeBar implements ICompositeBar {
 	}
 
 	public move(compositeId: string, toCompositeId: string): void {
+		// Make sure both composites are known to this composite bar
+		if (this.options.composites.filter(c => c.id === compositeId || c.id === toCompositeId).length !== 2) {
+			return;
+		}
 		// Make sure a moved composite gets pinned
 		if (!this.isPinned(compositeId)) {
 			this.pin(compositeId, false /* defer update, we take care of it */);