fix memcpy of NULL for zero-length strings

1 files changed, 1 insertions, 0 deletions

diff --git a/str.h b/str.h
index 0a22242..b5f2889 100644
--- a/str.h
+++ b/str.h
@@ -40,6 +40,7 @@ Str str_replace_end(Str s, Str a, Str b, Arena *m);
 /* conversions */
 
 char *str_to_cstr(Str s, Arena *a) {
+	if (!s.n) return "";
 	char *r = new_arr(a, char, s.n + 1);
 	memcpy(r, s.s, s.n);
 	r[s.n] = 0;