python-uncompyle6
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Published
20 hours ago •
rocky
rocky
"if else" condition generates "uncompyle6.semantics.pysource.SourceWalkerError: Deparsing stopped due to parse error"
If you compile this test.py into a .pyc (with import py_compile; py_compile.compile("test.py")):
def f():
L = []
if len(L) > 1:
if 1:
pass
else:
pass
else:
pass
then decompiling it with uncompyle6 with
with open('test_decompiled.py', 'w') as f:
uncompyle6.decompile_file(r'__pycache__\test.cpython-37.pyc', f)
generates this error:
uncompyle6.semantics.pysource.SourceWalkerError: Deparsing stopped due to parse error
Here is the full error:
# uncompyle6 version 3.7.1
# Python bytecode 3.7 (3394)
# Decompiled from: Python 3.7.6 (tags/v3.7.6:43364a7ae0, Dec 19 2019, 00:42:30) [MSC v.1916 64 bit (AMD64)]
# Embedded file name: test-class.py
# Compiled at: 2020-06-16 19:00:25
# Size of source mod 2**32: 131 bytes
def f--- This code section failed: ---
L. 2 0 BUILD_LIST_0 0
2 STORE_FAST 'L'
L. 3 4 LOAD_GLOBAL len
6 LOAD_FAST 'L'
8 CALL_FUNCTION_1 1 '1 positional argument'
10 LOAD_CONST 1
12 COMPARE_OP >
14 POP_JUMP_IF_FALSE 18 'to 18'
L. 5 16 JUMP_FORWARD 18 'to 18'
18_0 COME_FROM 16 '16'
18_1 COME_FROM 14 '14'
Parse error at or near `COME_FROM' instruction at offset 18_0
@rocky I found an even more minimal example:
L = []
if len(L) > 1:
pass
else:
pass
Error log:
L. 1 0 BUILD_LIST_0 0
2 STORE_NAME L
L. 2 4 LOAD_NAME len
6 LOAD_NAME L
8 CALL_FUNCTION_1 1 '1 positional argument'
10 LOAD_CONST 1
12 COMPARE_OP >
14 POP_JUMP_IF_FALSE 18 'to 18'
L. 3 16 JUMP_FORWARD 18 'to 18'
18_0 COME_FROM 16 '16'
18_1 COME_FROM 14 '14'
Parse error at or near `COME_FROM' instruction at offset 18_0
Both examples have been addressed in the decompyle3 project. However the massive grammar changes needs to be backported here.
have been addressed in the decompyle6 project
@rocky what is the decompyle6 project? Is it different to uncompyle6?
