[issue44008] os.walk and other directory traversal does not handle recursive mounts on Windows

[Eryk Sun]

Change by Eryk Sun :


--
resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> os.walk always follows Windows junctions

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[issue44008] os.walk and other directory traversal does not handle recursive mounts on Windows

[R0b0t1]

New submission from R0b0t1 :

Using `os.walk` to traverse a filesystem on Windows does not terminate in the 
case of a recursive mountpoint existing somewhere in the path.

In my case C:\circlemount is linked to C:\, producing paths such as 
C:\circlemount\circlemount\circlemount\circlemount\...

A drive mount point may be set up as follows:

```diskpart (enters shell)
list volume`
select volume ${#}`
assign mount=${path}
```

Notably this only happens for Win32 python. Cygwin and MSYS2 pythons as well as 
the pythons distributed with some packages like Inkscape behave properly.

--
components: Windows
messages: 392666
nosy: R0b0t1, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: os.walk and other directory traversal does not handle recursive mounts 
on Windows
type: behavior
versions: Python 3.8

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