Need to save stack space by number of registers from the current proc,
Not from the execution ensure proc; fix
MODIFY
src/vm.c
src/vm.c
@@ -309,6 +309,7 @@ static void
ecall(mrb_state *mrb, int i)
{
struct RProc *p;
+ int nregs;
struct mrb_context *c = mrb->c;
mrb_callinfo *ci = c->ci;
struct RObject *exc;
@@ -323,6 +324,7 @@ ecall(mrb_state *mrb, int i)
p = c->ensure[i];
if (!p) return;
mrb_assert(!MRB_PROC_CFUNC_P(p));
+ nregs = ci->proc->body.irep->nregs;
c->ensure[i] = NULL;
cioff = ci - c->cibase;
ci = cipush(mrb);
@@ -335,7 +337,7 @@ ecall(mrb_state *mrb, int i)
ci->target_class = MRB_PROC_TARGET_CLASS(p);
env = MRB_PROC_ENV(p);
mrb_assert(env);
- c->stack += p->body.irep->nregs;
+ c->stack += nregs;
exc = mrb->exc; mrb->exc = 0;
if (exc) {
mrb_gc_protect(mrb, mrb_obj_value(exc));

Need to save stack space by number of registers from the current proc,

Not from the execution ensure proc; fix #3849