wrong condiiton in too many symbols check; #close #731

src/codegen.c

@@ -429,12 +429,12 @@ new_msym(codegen_scope *s, mrb_sym sym)
   int i, len;
 
   len = s->irep->slen;
-  if (len > 255) len = 255;
+  if (len > 256) len = 256;
   for (i=0; i<len; i++) {
     if (s->irep->syms[i] == sym) return i;
     if (s->irep->syms[i] == 0) break;
   }
-  if (i > 255) {
+  if (i == 256) {
     codegen_error(s, "too many symbols (max 256)");
   }
   s->irep->syms[i] = sym;