From 2e39eb6e2c9df46f69f9f8e7fcb7233bbc1c7e92 Mon Sep 17 00:00:00 2001
From: Peter Gromov <peter@jetbrains.com>
Date: Wed, 22 Jul 2020 08:02:12 +0200
Subject: [PATCH] assert that ModelBranch can only be created in a read action
 (IDEA-CR-65317)

GitOrigin-RevId: 23f917ff162b8d472f900c1704de3257c7c4d86d
---
 platform/core-impl/src/com/intellij/model/ModelBranchImpl.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/platform/core-impl/src/com/intellij/model/ModelBranchImpl.java b/platform/core-impl/src/com/intellij/model/ModelBranchImpl.java
index e9c462df7f35..e486a600413d 100644
--- a/platform/core-impl/src/com/intellij/model/ModelBranchImpl.java
+++ b/platform/core-impl/src/com/intellij/model/ModelBranchImpl.java
@@ -3,6 +3,7 @@ package com.intellij.model;
 
 import com.intellij.injected.editor.VirtualFileWindow;
 import com.intellij.model.psi.PsiSymbolReference;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.editor.Document;
 import com.intellij.openapi.editor.event.DocumentEvent;
 import com.intellij.openapi.editor.impl.DocumentImpl;
@@ -42,6 +43,7 @@ public final class ModelBranchImpl implements ModelBranch {
 
   private ModelBranchImpl(@NotNull Project project) {
     myProject = project;
+    ApplicationManager.getApplication().assertReadAccessAllowed();
     if (PsiDocumentManager.getInstance(project).hasEventSystemEnabledUncommittedDocuments()) {
       throw new IllegalStateException("Model branches may only be created on committed PSI");
     }