Segmentation fault in decompiling chained comparison

[llcc01]

When decompiling .pyc files that contain if-elif-else statements with chained comparisons, a segmentation fault occurs.

Python 3.9.21

Python source code:

def test(msgtype, num):
    if num <= 1:
        msgtype = 1
    elif 2 < num <= 3:
        msgtype = 3
    else:
        msgtype = 4
    return msgtype

[greenozon]

I've tried this sample on Python 3.10 and it did not crash...
could you attach you sample .pyc file pls

[llcc01]

I've tried this sample on Python 3.10 and it did not crash... could you attach you sample .pyc file pls

if_elif_else_chained_comparison.tar.gz

[greenozon]

thanks
confirmed

./pycdas ./if_elif_else_chained_comparison.3.9.pyc 
if_elif_else_chained_comparison.3.9.pyc (Python 3.9)
[Code]
    File Name: if_elif_else_chained_comparison.py
    Object Name: <module>
    Arg Count: 0
    Pos Only Arg Count: 0
    KW Only Arg Count: 0
    Locals: 0
    Stack Size: 2
    Flags: 0x00000040 (CO_NOFREE)
    [Names]
        'test'
    [Var Names]
    [Free Vars]
    [Cell Vars]
    [Constants]
        [Code]
            File Name: if_elif_else_chained_comparison.py
            Object Name: test
            Arg Count: 2
            Pos Only Arg Count: 0
            KW Only Arg Count: 0
            Locals: 2
            Stack Size: 3
            Flags: 0x00000043 (CO_OPTIMIZED | CO_NEWLOCALS | CO_NOFREE)
            [Names]
            [Var Names]
                'msgtype'
                'num'
            [Free Vars]
            [Cell Vars]
            [Constants]
                None
                1
                2
                3
                4
            [Disassembly]
                0       LOAD_FAST                       1: num
                2       LOAD_CONST                      1: 1
                4       COMPARE_OP                      1 (<=)
                6       POP_JUMP_IF_FALSE               14
                8       LOAD_CONST                      1: 1
                10      STORE_FAST                      0: msgtype
                12      JUMP_FORWARD                    34 (to 48)
                14      LOAD_CONST                      2: 2
                16      LOAD_FAST                       1: num
                18      DUP_TOP                         
                20      ROT_THREE                       
                22      COMPARE_OP                      0 (<)
                24      POP_JUMP_IF_FALSE               34
                26      LOAD_CONST                      3: 3
                28      COMPARE_OP                      1 (<=)
                30      POP_JUMP_IF_FALSE               44
                32      JUMP_FORWARD                    4 (to 38)
                34      POP_TOP                         
                36      JUMP_FORWARD                    6 (to 44)
                38      LOAD_CONST                      3: 3
                40      STORE_FAST                      0: msgtype
                42      JUMP_FORWARD                    4 (to 48)
                44      LOAD_CONST                      4: 4
                46      STORE_FAST                      0: msgtype
                48      LOAD_FAST                       0: msgtype
                50      RETURN_VALUE                    
        'test'
        None
    [Disassembly]
        0       LOAD_CONST                      0: <CODE> test
        2       LOAD_CONST                      1: 'test'
        4       MAKE_FUNCTION                   0
        6       STORE_NAME                      0: test
        8       LOAD_CONST                      2: None
        10      RETURN_VALUE  

./pycdc ./if_elif_else_chained_comparison.3.9.pyc 
# Source Generated with Decompyle++
# File: if_elif_else_chained_comparison.3.9.pyc (Python 3.9)


def test(msgtype, num):
Segmentation fault (core dumped)

[Aasyaco]

When decompiling .pyc files that contain if-elif-else statements with chained comparisons, a segmentation fault occurs.

Python 3.9.21

Python source code:

def test(msgtype, num):
if num <= 1:
msgtype = 1
elif 2 < num <= 3:
msgtype = 3
else:
msgtype = 4
return msgtype

# Source Generated with Decompyle++
# File: if_elif_else_chained_comparison.3.9.pyc (Python 3.9)


def test(msgtype, num):
    if num <= 1:
        msgtype = 1
    elif 2 < num <= 3:
        pass
    else:
        msgtype = 4
    return msgtype