New issue 3139: Tracing of decorated functions has changed between 7.2.0 and
7.3.0
https://bitbucket.org/pypy/pypy/issues/3139/tracing-of-decorated-functions-has-changed
Ned Batchelder:
The line numbers compiled into code objects has changed for decorated functions
In 7.2.0, the def line was included for decorated functions. In 7.3.0, the def
line is not included. Decorated methods include the def line in all versions.
CPython has always included the def line for decorated functions. For
decorated methods, they changed in 3.8 to include the def line for decorated
methods also.
CPython changed their behavior in Python 3.8 to include the def line for
methods, but not functions.
```
$ cat decorators.py
# 1
@foo(3)
@bar
def func(x, y=5):
return 6
class Foo:
'''9'''
@foo
def __init__(self):
'''12'''
return 13
@foo(
16,
17,
)
def meth(self):
return 20
@foo(
23
)
def func(x=25):
return 26
$ /usr/local/pythonz/pythons/PyPy3-v7.2.0/bin/pypy3 -m dis decorators.py
3 0 LOAD_NAME 0 (foo)
2 LOAD_CONST 0 (3)
4 CALL_FUNCTION 1
4 6 LOAD_NAME 1 (bar)
5 8 LOAD_CONST 1 (5)
10 BUILD_TUPLE 1
12 LOAD_CONST 2 (<code object func at
0x000000010a7b76e8, file "decorators.py", line 3>)
14 LOAD_CONST 3 ('func')
16 MAKE_FUNCTION 1
18 CALL_FUNCTION 1
20 CALL_FUNCTION 1
22 STORE_NAME 2 (func)
8 24 LOAD_BUILD_CLASS
26 LOAD_CONST 4 (<code object Foo at
0x000000010a7b7970, file "decorators.py", line 8>)
28 LOAD_CONST 5 ('Foo')
30 MAKE_FUNCTION 0
32 LOAD_CONST 5 ('Foo')
34 CALL_FUNCTION 2
36 STORE_NAME 3 (Foo)
22 38 LOAD_NAME 0 (foo)
23 40 LOAD_CONST 6 (23)
42 CALL_FUNCTION 1
25 44 LOAD_CONST 7 (25)
46 BUILD_TUPLE 1
48 LOAD_CONST 8 (<code object func at
0x000000010a7b7a48, file "decorators.py", line 22>)
50 LOAD_CONST 3 ('func')
52 MAKE_FUNCTION 1
54 CALL_FUNCTION 1
56 STORE_NAME 2 (func)
58 LOAD_CONST 9 (None)
60 RETURN_VALUE
$ /usr/local/pythonz/pythons/PyPy3-v7.3.0/bin/pypy3 -m dis decorators.py
3 0 LOAD_NAME 0 (foo)
2 LOAD_CONST 0 (3)
4 CALL_FUNCTION 1
4 6 LOAD_NAME 1 (bar)
8 LOAD_CONST 1 ((5,))
10 LOAD_CONST 2 (<code object func at
0x000000010bc93e80, file "decorators.py", line 3>)
12 LOAD_CONST 3 ('func')
14 MAKE_FUNCTION 1
16 CALL_FUNCTION 1
18 CALL_FUNCTION 1
20 STORE_NAME 2 (func)
8 22 LOAD_BUILD_CLASS
24 LOAD_CONST 4 (<code object Foo at
0x000000010bcd41d0, file "decorators.py", line 8>)
26 LOAD_CONST 5 ('Foo')
28 MAKE_FUNCTION 0
30 LOAD_CONST 5 ('Foo')
32 CALL_FUNCTION 2
34 STORE_NAME 3 (Foo)
22 36 LOAD_NAME 0 (foo)
23 38 LOAD_CONST 6 (23)
40 CALL_FUNCTION 1
42 LOAD_CONST 7 ((25,))
44 LOAD_CONST 8 (<code object func at
0x000000010bcd42a8, file "decorators.py", line 22>)
46 LOAD_CONST 3 ('func')
48 MAKE_FUNCTION 1
50 CALL_FUNCTION 1
52 STORE_NAME 2 (func)
54 LOAD_CONST 9 (None)
56 RETURN_VALUE
```
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