electrum

commit 882e259a78024d63b576d6ff3a8d50a576327072
parent 4c2deb6d2bfe4680a2cc9596f15d10823665f58a
Author: ThomasV <thomasv@electrum.org>
Date:   Tue,  1 Aug 2017 11:00:12 +0200

sanity check read_header

Diffstat:
M
lib/blockchain.py
 | 
2
++

1 file changed, 2 insertions(+), 0 deletions(-)
diff --git a/lib/blockchain.py b/lib/blockchain.py
@@ -242,6 +242,8 @@ class Blockchain(util.PrintError):
 
     def read_header(self, height):
         assert self.parent_id != self.checkpoint
+        if height < 0:
+            return
         if height < self.checkpoint:
             return self.parent().read_header(height)
         if height > self.height():