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py/vm: Prevent array bound warning when using -MP_OBJ_ITER_BUF_NSLOTS. #6231

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Apr 5, 2022
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8 changes: 4 additions & 4 deletions py/vm.c
Original file line number Diff line number Diff line change
Expand Up @@ -821,8 +821,8 @@ unwind_jump:;
obj = mp_getiter(obj, iter_buf);
if (obj != MP_OBJ_FROM_PTR(iter_buf)) {
// Iterator didn't use the stack so indicate that with MP_OBJ_NULL.
sp[-MP_OBJ_ITER_BUF_NSLOTS + 1] = MP_OBJ_NULL;
sp[-MP_OBJ_ITER_BUF_NSLOTS + 2] = obj;
*(sp - MP_OBJ_ITER_BUF_NSLOTS + 1) = MP_OBJ_NULL;
*(sp - MP_OBJ_ITER_BUF_NSLOTS + 2) = obj;
}
DISPATCH();
}
Expand All @@ -833,8 +833,8 @@ unwind_jump:;
DECODE_ULABEL; // the jump offset if iteration finishes; for labels are always forward
code_state->sp = sp;
mp_obj_t obj;
if (sp[-MP_OBJ_ITER_BUF_NSLOTS + 1] == MP_OBJ_NULL) {
obj = sp[-MP_OBJ_ITER_BUF_NSLOTS + 2];
if (*(sp - MP_OBJ_ITER_BUF_NSLOTS + 1) == MP_OBJ_NULL) {
obj = *(sp - MP_OBJ_ITER_BUF_NSLOTS + 2);
} else {
obj = MP_OBJ_FROM_PTR(&sp[-MP_OBJ_ITER_BUF_NSLOTS + 1]);
}
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