1 files changed, 2 insertions, 2 deletions
diff --git a/marshal.c b/marshal.c
index 185ace6a72..f97b3b8f21 100644
--- a/marshal.c
+++ b/marshal.c
@@ -468,7 +468,7 @@ w_object(obj, arg, limit)
 	return;
     }
 
-    if (ivtbl = rb_generic_ivar_table(obj)) {
+    if ((ivtbl = rb_generic_ivar_table(obj)) != 0) {
 	w_byte(TYPE_IVAR, arg);
     }
     if (obj == Qnil) {
@@ -873,7 +873,7 @@ r_bytes0(len, arg)
 
     if (len == 0) return rb_str_new(0, 0);
     if (TYPE(arg->src) == T_STRING) {
-	if (RSTRING(arg->src)->len > arg->offset) {
+	if (RSTRING(arg->src)->len - arg->offset >= len) {
 	    str = rb_str_new(RSTRING(arg->src)->ptr+arg->offset, len);
 	    arg->offset += len;
 	}