commit f6964a1eac579cb538ca952be377715ebcd990f3
author Gavin Howard <yzena.tech@gmail.com> Wed Mar 14 10:52:31 2018 -0600
committer Gavin Howard <yzena.tech@gmail.com> Tue Aug 28 17:11:02 2018 -0600
tree a6a64344ed10a113a58235ffcd0ae8f15910d2f4
parent 0ba76f7b25a3452e53d66a007268c1a99901c7bc

Deal with zero in add

src/bc/num.c

diff --git a/src/bc/num.c b/src/bc/num.c
index 4700b10..d1be48e 100644
--- a/src/bc/num.c
+++ b/src/bc/num.c
@@ -212,6 +212,9 @@
 
   (void) scale;
 
+  if (!a->len) return bc_num_copy(c, b);
+  else if (!b->len) return bc_num_copy(c, a);
+
   c->neg = a->neg;
 
   memset(c->num, 0, c->cap * sizeof(BcDigit));