From 5bb75a5894778c13006d7ad33a5a6c9a1e2fa56a Mon Sep 17 00:00:00 2001
From: carllin <wumu727@gmail.com>
Date: Fri, 3 May 2019 15:17:37 -0700
Subject: [PATCH] Fix roots never being purged (#4134)

---
 runtime/src/accounts_index.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/runtime/src/accounts_index.rs b/runtime/src/accounts_index.rs
index 90428c3e5d..c4dec064bf 100644
--- a/runtime/src/accounts_index.rs
+++ b/runtime/src/accounts_index.rs
@@ -60,7 +60,7 @@ impl<T: Clone> AccountsIndex<T> {
         rv
     }
     pub fn is_purged(&self, fork: Fork) -> bool {
-        !self.is_root(fork) && fork < self.last_root
+        fork < self.last_root
     }
     pub fn is_root(&self, fork: Fork) -> bool {
         self.roots.contains(&fork)
@@ -152,6 +152,8 @@ mod tests {
         assert!(!index.is_purged(0));
         index.add_root(1);
         assert!(index.is_purged(0));
+        index.add_root(2);
+        assert!(index.is_purged(1));
     }
 
     #[test]