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-sprintf/src/sprintf.c b/mrbgems/mruby-sprintf/src/sprintf.c
index 3ecf11afb..951b37059 100644
--- a/mrbgems/mruby-sprintf/src/sprintf.c
+++ b/mrbgems/mruby-sprintf/src/sprintf.c
@@ -517,7 +517,7 @@ static mrb_value
 mrb_f_sprintf(mrb_state *mrb, mrb_value obj)
 {
   mrb_int argc;
-  mrb_value *argv;
+  const mrb_value *argv;
 
   mrb_get_args(mrb, "*", &argv, &argc);