From 5120609e6e81974acd3a2e9704e74e32b770ef6f Mon Sep 17 00:00:00 2001
From: Daniel Holden <theonlydancingbanana@hotmail.com>
Date: Sun, 1 Sep 2019 16:21:11 -0400
Subject: [PATCH] fixed bug with trimming string with all space characters

---
 mpc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mpc.c b/mpc.c
index befd1b5..9aa5a13 100644
--- a/mpc.c
+++ b/mpc.c
@@ -2470,7 +2470,7 @@ mpc_val_t *mpcf_strtriml(mpc_val_t *x) {
 mpc_val_t *mpcf_strtrimr(mpc_val_t *x) {
   char *s = x;
   size_t l = strlen(s);
-  while (isspace((unsigned char)s[l-1])) {
+  while (l > 0 && isspace((unsigned char)s[l-1])) {
     s[l-1] = '\0'; l--;
   }
   return s;