Closed as not planned
Description
The instruction pointer f_lasti points under some conditions to a CACHE opcode.
This is not completely wrong, because this cache opcode comes after the expected CALL opcode, but the documetation says that CACHE opcodes should be skipped. Which it is not in this case.
script:
import inspect
import dis
frame = inspect.currentframe()
class Tester:
def __call__(self, f):
deco(f)
tester = Tester()
def deco(f):
assert f.__name__ == "foo"
instructions = list(dis.get_instructions(frame.f_code, show_caches=True))
opname = instructions[frame.f_lasti // 2].opname
print(f"{frame.f_lasti = }\n{opname = }")
assert opname == "CALL", opname
print("correct")
@tester
def foo():
pass
print()
print("incorrect")
@deco
def foo():
passoutput (Python 3.11.0rc2+):
correct
frame.f_lasti = 132
opname = 'CALL'
incorrect
frame.f_lasti = 204
opname = 'CACHE'
Traceback (most recent call last):
File "/home/frank/projects/executing/example.py", line 35, in <module>
@deco
^^^^
File "/home/frank/projects/executing/example.py", line 20, in deco
assert opname == "CALL", opname
AssertionError: CACHE