Fix type of `eidx` and `ridx` from `uint8_t` to `uint16_t`; fix
A byte was too small to hold ensure&rescue stacks indexes.
@@ -152,9 +152,9 @@ struct mrb_context {
mrb_callinfo *cibase, *ciend;
uint16_t *rescue; /* exception handler stack */
- int rsize;
+ uint16_t rsize;
struct RProc **ensure; /* ensure handler stack */
- uint8_t esize, eidx;
+ uint16_t esize, eidx;
enum mrb_fiber_state status;
mrb_bool vmexec;
