Fixed a bug in INIT_DISPATCH for non direct threading; fix
MODIFY
src/vm.c
src/vm.c
@@ -935,7 +935,7 @@ argnum_error(mrb_state *mrb, mrb_int num)
#ifndef DIRECT_THREADED
-#define INIT_DISPATCH for (;;) { insn = BYTECODE_DECODER(*pc); pc++; CODE_FETCH_HOOK(mrb, irep, pc, regs); switch (insn) {
+#define INIT_DISPATCH for (;;) { insn = BYTECODE_DECODER(*pc); CODE_FETCH_HOOK(mrb, irep, pc, regs); switch (insn) {
#define CASE(insn,ops) case insn: pc++; FETCH_ ## ops ();; L_ ## insn ## _BODY:
#define NEXT break
#define JUMP NEXT

Fixed a bug in INIT_DISPATCH for non direct threading; fix #4153