I don't know why don't use refcount
`
/* borrowed reference */
c.c_filename = filename;
`
in https://github.com/python/cpython/blob/master/Python/ast.c#L786-L787

like
`
Py_INCREF(filename);
c.c_filename = filename;
`
in https://github.com/python/cpython/blob/master/Python/compile.c#L333

Due to victor add the desc(`/* borrowed reference */`)
so noisy+ victor ;)

> Due to victor add the desc(`/* borrowed reference */`)

I added the comment, but the code was always like that.

In short, borrowed references are used to simply the implementation (avoid the need to DECREF on error) and/or for efficiency.

I don't understand the purpose of this issue. The bug tracker is not the right place to ask question. If you think that it's a bug, please explain how to trigger the bug.

I suggest to close the issue.

Because there is no need to use refcount.

And there is no need to use refcount in compile.c too.

> I don't understand the purpose of this issue. The bug tracker is not the right place to ask question. If you think that it's a bug, please explain how to trigger the bug.

Hi, victor. What i want to express is that the refcount operation of filename should be same between ast.c and compile.c.

I am not sure i express it clearly. 

If the refcount of filename in ast.c is redundant as Serhiy said, maybe we should remove it? 

Hm, If we think it's fine, just keep it, i will close it soon.
And pls forgive me adding a noisy bpo again ;(

There is no bug. We can add Py_INCREF/Py_DECREF in ast.c. We can remove Py_INCREF/Py_DECREF from compile.c. But all this would just add code churn.

Thanks for your patience, Serhiy.

IMHO, i called the moving operation `clean code`: Consistent understanding, Consistent code. And the `clean code` should be a part of `enhancement`.