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, 2 insertions, 2 deletions

diff --git a/mrbgems/mruby-io/src/file.c b/mrbgems/mruby-io/src/file.c
index d272cab7d..ab325195c 100644
--- a/mrbgems/mruby-io/src/file.c
+++ b/mrbgems/mruby-io/src/file.c
@@ -115,7 +115,7 @@ mrb_file_s_umask(mrb_state *mrb, mrb_value klass)
 static mrb_value
 mrb_file_s_unlink(mrb_state *mrb, mrb_value obj)
 {
-  mrb_value *argv;
+  const mrb_value *argv;
   mrb_value pathv;
   mrb_int argc, i;
   char *path;
@@ -533,7 +533,7 @@ static mrb_value
 mrb_file_s_chmod(mrb_state *mrb, mrb_value klass) {
   mrb_int mode;
   mrb_int argc, i;
-  mrb_value *filenames;
+  const mrb_value *filenames;
   int ai = mrb_gc_arena_save(mrb);
 
   mrb_get_args(mrb, "i*", &mode, &filenames, &argc);