From d103c296e3579d953898dcdb09feaa5aaa344860 Mon Sep 17 00:00:00 2001
From: Rustam Vishnyakov <rustam.vishnyakov@jetbrains.com>
Date: Tue, 7 Nov 2017 15:53:21 +0300
Subject: [PATCH] Check PSI file validity for EA-87814

---
 .../com/intellij/codeInsight/actions/ReformatCodeProcessor.java  | 1 +
 1 file changed, 1 insertion(+)

diff --git a/platform/lang-impl/src/com/intellij/codeInsight/actions/ReformatCodeProcessor.java b/platform/lang-impl/src/com/intellij/codeInsight/actions/ReformatCodeProcessor.java
index f88c2b3b7155..1415fd2e765d 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/actions/ReformatCodeProcessor.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/actions/ReformatCodeProcessor.java
@@ -106,6 +106,7 @@ public class ReformatCodeProcessor extends AbstractLayoutCodeProcessor {
   protected FutureTask<Boolean> prepareTask(@NotNull final PsiFile file, final boolean processChangedTextOnly)
     throws IncorrectOperationException
   {
+    LOG.assertTrue(file.isValid(), "Invalid Psi file, name: " + file.getName() + " , class: " + file.getClass().getSimpleName());
     return new FutureTask<>(() -> {
       FormattingProgressTask.FORMATTING_CANCELLED_FLAG.set(false);
       try {