Do not raise an exception for living closure; ref
MODIFY
src/vm.c
src/vm.c
@@ -1828,7 +1828,7 @@ RETRY_TRY_BLOCK:
ci = mrb->c->ci;
break;
case OP_R_BREAK:
- if (ci->acc < 0 || !proc->env || !MRB_ENV_STACK_SHARED_P(proc->env)) {
+ if (!proc->env || !MRB_ENV_STACK_SHARED_P(proc->env)) {
mrb_value exc;
L_BREAK_ERROR:
@@ -1843,8 +1843,16 @@ RETRY_TRY_BLOCK:
mrb->c = c->prev;
c->prev = NULL;
- }
ci = mrb->c->ci;
+ }
+ if (ci->acc < 0) {
+ while (eidx > mrb->c->ci[-1].eidx) {
+ ecall(mrb, --eidx);
+ }
+ mrb->c->vmexec = FALSE;
+ mrb->jmp = prev_jmp;
+ return v;
+ }
mrb->c->stack = ci->stackent;
mrb->c->ci = mrb->c->cibase + proc->env->cioff + 1;
while (ci > mrb->c->ci) {

Do not raise an exception for living closure; ref #3359