From 84aad508f778d89d89d37a38d20210a946cf6fd0 Mon Sep 17 00:00:00 2001
From: Jordan Harband <ljharb@gmail.com>
Date: Mon, 12 Oct 2015 16:57:45 -0700
Subject: [PATCH] Check `$#` before trying to check `$1`. Avoids failure due to
 `nounset` bash option.

Partially fixes #868.
---
 nvm.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nvm.sh b/nvm.sh
index edbc54a..b5206d2 100755
--- a/nvm.sh
+++ b/nvm.sh
@@ -2235,7 +2235,7 @@ nvm_supports_xz() {
 }
 
 NVM_VERSION="$(nvm_alias default 2>/dev/null || echo)"
-if nvm_supports_source_options && [ "_$1" = "_--install" ]; then
+if nvm_supports_source_options && [ "$#" -gt 0 ] && [ "_$1" = "_--install" ]; then
   if [ -n "$NVM_VERSION" ]; then
     nvm install "$NVM_VERSION" >/dev/null
   elif nvm_rc_version >/dev/null 2>&1; then