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-rw-r--r--marshal.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/marshal.c b/marshal.c
index 25d08ac471..e90879a35d 100644
--- a/marshal.c
+++ b/marshal.c
@@ -102,7 +102,8 @@ w_byten(s, n, arg)
struct dump_arg *arg;
{
if (arg->fp) {
- fwrite(s, 1, n, arg->fp);
+ if (rb_io_fwrite(s, n, arg->fp) < 0)
+ rb_sys_fail(0);
}
else {
VALUE buf = arg->str;