io.c (io_write_nonblock): add RB_GC_GUARD, io_fflush may switch threads
Since io_fflush may block on mutex or rb_io_wait_readable and switch threads, we need to ensure the str' VALUE returned by rb_obj_as_string` is visible to GC.
str' VALUE returned by
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66242 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
io.c (io_write_nonblock): add RB_GC_GUARD, io_fflush may switch threads
Since io_fflush may block on mutex or rb_io_wait_readable and
switch threads, we need to ensure the
str' VALUE returned byrb_obj_as_string` is visible to GC.git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66242 b2dd03c8-39d4-4d8f-98ff-823fe69b080e