From 90a7f3d0f62f736cb8f6e0a439b7bfa7c921509a Mon Sep 17 00:00:00 2001
From: Antioch Peverell <30642645+antiochp@users.noreply.github.com>
Date: Thu, 22 Mar 2018 21:48:05 -0400
Subject: [PATCH] Validating an empty chain no longer panics (#850)

---
 chain/src/chain.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/chain/src/chain.rs b/chain/src/chain.rs
index 4335878dc..904b992f8 100644
--- a/chain/src/chain.rs
+++ b/chain/src/chain.rs
@@ -413,6 +413,12 @@ impl Chain {
 	/// Validate the current chain state.
 	pub fn validate(&self, skip_rproofs: bool) -> Result<(), Error> {
 		let header = self.store.head_header()?;
+
+		// Lets just treat an "empty" node that just got started up as valid.
+		if header.height == 0 {
+			return Ok(());
+		}
+
 		let mut txhashset = self.txhashset.write().unwrap();
 
 		// Now create an extension from the txhashset and validate