From 60843512c69af574b68183a21549fdd2ad8eb6c0 Mon Sep 17 00:00:00 2001
From: Dmitry Jemerov <yole@jetbrains.com>
Date: Fri, 8 May 2020 16:27:55 +0200
Subject: [PATCH] Ensure that we remove editor reference from myActiveEditors
 when editor is released (IDEA-240456)

GitOrigin-RevId: 541df88c4b136a3cab8d9f1d529656217bcd4351
---
 .../com/intellij/codeInsight/daemon/impl/DaemonListeners.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/DaemonListeners.java b/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/DaemonListeners.java
index 0f9850ce4d2f..9adfba618ad3 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/DaemonListeners.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/DaemonListeners.java
@@ -84,6 +84,7 @@ import org.jetbrains.annotations.Nullable;
 
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
@@ -169,7 +170,7 @@ public final class DaemonListeners implements Disposable {
           return;
         }
 
-        myActiveEditors = activeEditors;
+        myActiveEditors = new ArrayList<>(activeEditors);
         // do not stop daemon if idea loses/gains focus
         DaemonListeners.this.stopDaemon(true, "Active editor change");
         if (ApplicationManager.getApplication().isDispatchThread() && LaterInvocator.isInModalContext()) {
@@ -209,6 +210,7 @@ public final class DaemonListeners implements Disposable {
 
       @Override
       public void editorReleased(@NotNull EditorFactoryEvent event) {
+        myActiveEditors.remove(event.getEditor());
         // mem leak after closing last editor otherwise
         UIUtil.invokeLaterIfNeeded(() -> {
           IntentionsUI intentionUI = myProject.getServiceIfCreated(IntentionsUI.class);