1 files changed, 20 insertions, 4 deletions
@@ -15,6 +15,8 @@
 static const char *const
 STRINGIO_VERSION = "3.1.1";
 #include "ruby.h"
 #include "ruby/io.h"
 #include "ruby/encoding.h"
@@ -49,6 +51,13 @@ static long strio_write(VALUE self, VALUE str);
 #define IS_STRIO(obj) (rb_typeddata_is_kind_of((obj), &strio_data_type))
 #define error_inval(msg) (rb_syserr_fail(EINVAL, msg))
 #define get_enc(ptr) ((ptr)->enc ? (ptr)->enc : !NIL_P((ptr)->string) ? rb_enc_get((ptr)->string) : NULL)
 static struct StringIO *
 strio_alloc(void)
@@ -166,8 +175,14 @@ writable(VALUE strio)
 static void
 check_modifiable(struct StringIO *ptr)
 {
- if (OBJ_FROZEN(ptr->string)) {
-	rb_raise(rb_eIOError, "not modifiable string");
 }
 }
@@ -287,7 +302,8 @@ strio_init(int argc, VALUE *argv, struct StringIO *ptr, VALUE self)
 else if (!argc) {
 string = rb_enc_str_new("", 0, rb_default_external_encoding());
 }
- if (!NIL_P(string) && OBJ_FROZEN_RAW(string)) {
 if (ptr->flags & FMODE_WRITABLE) {
 rb_syserr_fail(EACCES, 0);
 }
@@ -481,7 +497,7 @@ strio_set_string(VALUE self, VALUE string)
 rb_io_taint_check(self);
 ptr->flags &= ~FMODE_READWRITE;
 StringValue(string);
- ptr->flags = OBJ_FROZEN(string) ? FMODE_READABLE : FMODE_READWRITE;
 ptr->pos = 0;
 ptr->lineno = 0;
 RB_OBJ_WRITE(self, &ptr->string, string);