Prohibit array changes by "a"/"*" specifier of `mrb_get_args()`

The "a"/"*" specifier of the `mrb_get_args()` function will now return `const mrb_value *`.
This is because it is difficult for the caller to check if it is an array object and write-barrier if necessary.
And it requires calling `mrb_ary_modify()` on the unmodified array object, which is also difficult (this is similar to #5087).

1 files changed, 1 insertions, 1 deletions

diff --git a/mrbgems/mruby-io/src/io.c b/mrbgems/mruby-io/src/io.c
index 0fa0f34b1..d4505e4f7 100644
--- a/mrbgems/mruby-io/src/io.c
+++ b/mrbgems/mruby-io/src/io.c
@@ -1154,7 +1154,7 @@ mrb_io_s_pipe(mrb_state *mrb, mrb_value klass)
 static mrb_value
 mrb_io_s_select(mrb_state *mrb, mrb_value klass)
 {
-  mrb_value *argv;
+  const mrb_value *argv;
   mrb_int argc;
   mrb_value read, read_io, write, except, timeout, list;
   struct timeval *tp, timerec;