From 9e3999cab9de99688d8dcbce432ccdb7595238cf Mon Sep 17 00:00:00 2001
From: Nathan Sobo <nathan@github.com>
Date: Thu, 2 Mar 2017 10:04:07 -0700
Subject: [PATCH] Cause an assertion failure if defaultMarkerLayer is destroyed
 early

This is to investigate a case where the default marker layer of the
editor is destroyed without the editor itself or its buffer being
destroyed, which is causing `Cannot decorate a destroyed marker`
exceptions.
---
 src/text-editor.coffee | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/text-editor.coffee b/src/text-editor.coffee
index 3cdd363a7..1f24fa252 100644
--- a/src/text-editor.coffee
+++ b/src/text-editor.coffee
@@ -192,6 +192,9 @@ class TextEditor extends Model
 
     @displayLayer.setTextDecorationLayer(@tokenizedBuffer)
     @defaultMarkerLayer = @displayLayer.addMarkerLayer()
+    @disposables.add(@defaultMarkerLayer.onDidDestroy =>
+      @assert(false, "defaultMarkerLayer destroyed at an unexpected time")
+    )
     @selectionsMarkerLayer ?= @addMarkerLayer(maintainHistory: true, persistent: true)
     @selectionsMarkerLayer.trackDestructionInOnDidCreateMarkerCallbacks = true