diff options
| -rw-r--r-- | mrbgems/mruby-io/src/io.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mrbgems/mruby-io/src/io.c b/mrbgems/mruby-io/src/io.c index d29f839f9..234d7b1fc 100644 --- a/mrbgems/mruby-io/src/io.c +++ b/mrbgems/mruby-io/src/io.c @@ -1476,6 +1476,9 @@ mrb_io_bufread(mrb_state *mrb, mrb_value self) mrb_int len; mrb_get_args(mrb, "Si", &str, &len); + mrb_assert(RSTRING_LEN(str) > 0); + mrb_assert(RSTRING_PTR(str) != NULL); + mrb_str_modify(mrb, RSTRING(str)); return io_bufread(mrb, str, len); } |