From 46ee6dee35e380febb835c44a50af83c7c4f009c Mon Sep 17 00:00:00 2001
From: Julia Beliaeva <Julia.Beliaeva@jetbrains.com>
Date: Wed, 3 Aug 2016 15:35:30 +0300
Subject: [PATCH] [vcs-log] deal with theoretical possibility of having no
 visible branches or head tags for a root EA-86545

---
 .../com/intellij/vcs/log/data/FakeVisiblePackBuilder.java    | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/platform/vcs-log/impl/src/com/intellij/vcs/log/data/FakeVisiblePackBuilder.java b/platform/vcs-log/impl/src/com/intellij/vcs/log/data/FakeVisiblePackBuilder.java
index 30fc8ccd162b..69f1de7fb050 100644
--- a/platform/vcs-log/impl/src/com/intellij/vcs/log/data/FakeVisiblePackBuilder.java
+++ b/platform/vcs-log/impl/src/com/intellij/vcs/log/data/FakeVisiblePackBuilder.java
@@ -91,8 +91,9 @@ public class FakeVisiblePackBuilder {
 
     Map<VirtualFile, Set<VcsRef>> map = VcsLogUtil.groupRefsByRoot(branchesAndHeads);
     Map<VirtualFile, CompressedRefs> refs = ContainerUtil.newHashMap();
-    for (VirtualFile root : map.keySet()) {
-      refs.put(root, new CompressedRefs(map.get(root), myHashMap));
+    for (VirtualFile root : providers.keySet()) {
+      Set<VcsRef> refsForRoot = map.get(root);
+      refs.put(root, new CompressedRefs(refsForRoot == null ? ContainerUtil.newHashSet() : refsForRoot, myHashMap));
     }
     return new RefsModel(refs, heads, myHashMap, providers);
   }