From e40791ec88e4cf0edd95fa79c78128df52026c7e Mon Sep 17 00:00:00 2001
From: Mikhail Golubev <mikhail.golubev@jetbrains.com>
Date: Wed, 14 Oct 2020 22:17:09 +0300
Subject: [PATCH] PY-44026 Fix IOOBE in the GlobalSearchScope, causing repeated
 reindexing

GitOrigin-RevId: ed38aec8490d51982f8f326b21714c496a0ed576
---
 .../python/psi/stubs/PyQualifiedNameCompletionMatcher.java     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/python/python-psi-impl/src/com/jetbrains/python/psi/stubs/PyQualifiedNameCompletionMatcher.java b/python/python-psi-impl/src/com/jetbrains/python/psi/stubs/PyQualifiedNameCompletionMatcher.java
index 3c3a262b1594..f01a764c3e63 100644
--- a/python/python-psi-impl/src/com/jetbrains/python/psi/stubs/PyQualifiedNameCompletionMatcher.java
+++ b/python/python-psi-impl/src/com/jetbrains/python/psi/stubs/PyQualifiedNameCompletionMatcher.java
@@ -212,7 +212,8 @@ public class PyQualifiedNameCompletionMatcher {
       VirtualFile closestRoot = findClosestRoot(nameAnchor, projectFileIndex);
       if (closestRoot == null) return null;
       String relativePath = VfsUtilCore.getRelativePath(nameAnchor, closestRoot);
-      if (relativePath == null) return null;
+      // A relative path can be empty in case of __init__.py directly inside a root.
+      if (relativePath == null || relativePath.isEmpty()) return null;
       return convertPathToImportableQualifiedName(relativePath);
     }