From a4db800551173b4eee26464f376026c0b445824b Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Wed, 19 Jul 2017 18:01:34 +0200
Subject: [PATCH] handle project closing in ctrl+hover bg calculation
 (EA-104555)

---
 .../intellij/codeInsight/navigation/CtrlMouseHandler.java | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/platform/lang-impl/src/com/intellij/codeInsight/navigation/CtrlMouseHandler.java b/platform/lang-impl/src/com/intellij/codeInsight/navigation/CtrlMouseHandler.java
index 1cee6845db61..c2395ae2650f 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/navigation/CtrlMouseHandler.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/navigation/CtrlMouseHandler.java
@@ -828,6 +828,8 @@ public class CtrlMouseHandler extends AbstractProjectComponent {
 
     @Nullable
     private ReadTask.Continuation doExecute(@NotNull PsiFile file, int offset) {
+      if (isTaskOutdated()) return null;
+
       final Info info;
       final DocInfo docInfo;
       try {
@@ -842,11 +844,15 @@ public class CtrlMouseHandler extends AbstractProjectComponent {
 
       LOG.debug("Obtained info about element under cursor");
       return new ReadTask.Continuation(() -> {
-        if (myDisposed || myEditor.isDisposed() || !myEditor.getComponent().isShowing()) return;
+        if (isTaskOutdated()) return;
         showHint(info, docInfo);
       });
     }
 
+    private boolean isTaskOutdated() {
+      return myDisposed || myProject.isDisposed() || myEditor.isDisposed() || !myEditor.getComponent().isShowing();
+    }
+
     private void showHint(@NotNull Info info, @NotNull DocInfo docInfo) {
       if (myDisposed || myEditor.isDisposed()) return;
       Component internalComponent = myEditor.getContentComponent();