From 147fffb7ec757612a0e32e3479f662415f67d87f Mon Sep 17 00:00:00 2001
From: "Jonathan \"Duke\" Leto" <jonathan@leto.net>
Date: Mon, 16 Oct 2017 08:39:59 -0700
Subject: [PATCH] Fix bug where performance-measurements.sh fails hards when
 given no args

Better than "$1: unbound variable", we ran into this when testing this
script in the Hush repo, so we are pushing this fix upstream.
---
 qa/zcash/performance-measurements.sh | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/qa/zcash/performance-measurements.sh b/qa/zcash/performance-measurements.sh
index 68de22892..fd7b30ffa 100755
--- a/qa/zcash/performance-measurements.sh
+++ b/qa/zcash/performance-measurements.sh
@@ -154,6 +154,13 @@ EOF
     xzcat block-107134.tar.xz | tar x -C "$DATADIR/regtest"
 }
 
+
+if [ $# -lt 2 ]
+then
+    echo "$0 : two arguments are required!"
+    exit 1
+fi
+
 # Precomputation
 case "$1" in
     *)