From abbdf4156057de8a4f866b0840defc00c2c500db Mon Sep 17 00:00:00 2001
From: zelig <viktor.tron@gmail.com>
Date: Wed, 25 Mar 2015 16:10:44 +0000
Subject: [PATCH] output error message if unlock address is invalid (fixes the
 wierd "read /path: is a directory") msg

---
 cmd/ethereum/main.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/cmd/ethereum/main.go b/cmd/ethereum/main.go
index 8983b85a6..2e721dc71 100644
--- a/cmd/ethereum/main.go
+++ b/cmd/ethereum/main.go
@@ -295,7 +295,11 @@ func unlockAccount(ctx *cli.Context, am *accounts.Manager, account string) (pass
 		// Load startup keys. XXX we are going to need a different format
 		// Attempt to unlock the account
 		passphrase = getPassPhrase(ctx, "", false)
-		err = am.Unlock(common.FromHex(account), passphrase)
+		accbytes := common.FromHex(account)
+		if len(accbytes) == 0 {
+			utils.Fatalf("Invalid account address '%s'", account)
+		}
+		err = am.Unlock(accbytes, passphrase)
 		if err != nil {
 			utils.Fatalf("Unlock account failed '%v'", err)
 		}