diff options
Diffstat (limited to 'ext/stringio/stringio.c')
| -rw-r--r-- | ext/stringio/stringio.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c index aa6fbf0cac..0c0f63aac7 100644 --- a/ext/stringio/stringio.c +++ b/ext/stringio/stringio.c @@ -180,7 +180,9 @@ check_modifiable(struct StringIO *ptr) else if (OBJ_FROZEN_RAW(ptr->string)) { rb_raise(rb_eIOError, "not modifiable string"); } - rb_str_modify(ptr->string); + else { + rb_str_modify(ptr->string); + } } static VALUE |