From fe95514af7a15d42f53801e4f38892cda53572c2 Mon Sep 17 00:00:00 2001
From: Dmitry Batkovich <dmitry.batkovich@jetbrains.com>
Date: Thu, 10 Oct 2019 14:28:31 +0300
Subject: [PATCH] add a special assertion if FileContentImpl#getPsiFile is
 called for a file with non language file type

GitOrigin-RevId: 58d83b8cbd96b3a0a893e3e6b18368440435c48d
---
 .../src/com/intellij/util/indexing/FileContentImpl.java    | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/platform/core-impl/src/com/intellij/util/indexing/FileContentImpl.java b/platform/core-impl/src/com/intellij/util/indexing/FileContentImpl.java
index 208fa9827b38..baeb61a65690 100644
--- a/platform/core-impl/src/com/intellij/util/indexing/FileContentImpl.java
+++ b/platform/core-impl/src/com/intellij/util/indexing/FileContentImpl.java
@@ -114,7 +114,12 @@ public class FileContentImpl extends IndexedFileImpl implements PsiDependentFile
     if (project == null) {
       project = DefaultProjectFactory.getInstance().getDefaultProject();
     }
-    return createFileFromText(project, text, (LanguageFileType)getFileTypeWithoutSubstitution(), myFile, myFileName);
+    FileType fileType = getFileTypeWithoutSubstitution();
+    if (!(fileType instanceof LanguageFileType)) {
+      throw new AssertionError("PSI can be created only for a file with LanguageFileType but actual is " + fileType.getClass()  + "." +
+                               "\nPlease use a proper FileBasedIndexExtension#getInputFilter() implementation for the caller index");
+    }
+    return createFileFromText(project, text, (LanguageFileType)fileType, myFile, myFileName);
   }
 
   @NotNull