merge revision(s) b3c53a8a885be8f5cc2b712798b0d2741c488ce4: [Backport #17672]

	Make Ractor stdio belonging to the Ractor [Bug #17672]

	Defer making ractor stdio until ractor started.
	Before ractor started, created objects belong to the caller ractor
	instead of the created ractor.
	---
	 bootstraptest/test_ractor.rb | 12 ++++++++++++
	 ractor.c                     |  9 ---------
	 thread.c                     |  9 +++++++++
	 3 files changed, 21 insertions(+), 9 deletions(-)

1 files changed, 0 insertions, 9 deletions

diff --git a/ractor.c b/ractor.c
index 8de13954ce..452a2ac445 100644
--- a/ractor.c
+++ b/ractor.c
@@ -1542,11 +1542,6 @@ rb_ractor_main_setup(rb_vm_t *vm, rb_ractor_t *r, rb_thread_t *th)
     rb_ractor_living_threads_insert(r, th);
 }
 
-// io.c
-VALUE rb_io_prep_stdin(void);
-VALUE rb_io_prep_stdout(void);
-VALUE rb_io_prep_stderr(void);
-
 static VALUE
 ractor_create(rb_execution_context_t *ec, VALUE self, VALUE loc, VALUE name, VALUE args, VALUE block)
 {
@@ -1558,10 +1553,6 @@ ractor_create(rb_execution_context_t *ec, VALUE self, VALUE loc, VALUE name, VAL
     r->pub.id = ractor_next_id();
     RUBY_DEBUG_LOG("r:%u", r->pub.id);
 
-    r->r_stdin = rb_io_prep_stdin();
-    r->r_stdout = rb_io_prep_stdout();
-    r->r_stderr = rb_io_prep_stderr();
-
     rb_ractor_t *cr = rb_ec_ractor_ptr(ec);
     r->verbose = cr->verbose;
     r->debug = cr->debug;