gh-93156: fix negative indexing into absolute pathlib.PurePath().parents
#93273
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…h().parents` When a `_PathParents` object has a drive or a root, the length of the object is *one less* than than the length of `self._parts`, which resulted in an off-by-one error when `path.parents[-n]` was fed through to `self._parts[:-n - 1]`. In particular, `path.parents[-1]` was a malformed path object with spooky properties. This is addressed by adding `len(self)` to negative indices.
barneygale
changed the title
pathlib.PurePath().parentspathlib.PurePath().parents
AA-Turner
added
type-bug
|
@barneygale should this be backported? A |
|
Yep - 3.11 and 3.10 are also affected. |
AA-Turner
reviewed
May 26, 2022
brettcannon
approved these changes
Jun 3, 2022
|
Thanks @barneygale for the PR, and @brettcannon for merging it |
miss-islington
pushed a commit
to miss-islington/cpython
that referenced
this pull request
Jun 3, 2022
…h().parents` (pythonGH-93273) When a `_PathParents` object has a drive or a root, the length of the object is *one less* than than the length of `self._parts`, which resulted in an off-by-one error when `path.parents[-n]` was fed through to `self._parts[:-n - 1]`. In particular, `path.parents[-1]` was a malformed path object with spooky properties. This is addressed by adding `len(self)` to negative indices. (cherry picked from commit f32e6b4) Co-authored-by: Barney Gale <barney.gale@gmail.com>
|
GH-93479 is a backport of this pull request to the 3.11 branch. |
miss-islington
pushed a commit
to miss-islington/cpython
that referenced
this pull request
Jun 3, 2022
…h().parents` (pythonGH-93273) When a `_PathParents` object has a drive or a root, the length of the object is *one less* than than the length of `self._parts`, which resulted in an off-by-one error when `path.parents[-n]` was fed through to `self._parts[:-n - 1]`. In particular, `path.parents[-1]` was a malformed path object with spooky properties. This is addressed by adding `len(self)` to negative indices. (cherry picked from commit f32e6b4) Co-authored-by: Barney Gale <barney.gale@gmail.com>
|
GH-93480 is a backport of this pull request to the 3.10 branch. |
miss-islington
added a commit
that referenced
this pull request
Jun 3, 2022
…rents` (GH-93273) When a `_PathParents` object has a drive or a root, the length of the object is *one less* than than the length of `self._parts`, which resulted in an off-by-one error when `path.parents[-n]` was fed through to `self._parts[:-n - 1]`. In particular, `path.parents[-1]` was a malformed path object with spooky properties. This is addressed by adding `len(self)` to negative indices. (cherry picked from commit f32e6b4) Co-authored-by: Barney Gale <barney.gale@gmail.com>
miss-islington
added a commit
that referenced
this pull request
Jun 3, 2022
…rents` (GH-93273) When a `_PathParents` object has a drive or a root, the length of the object is *one less* than than the length of `self._parts`, which resulted in an off-by-one error when `path.parents[-n]` was fed through to `self._parts[:-n - 1]`. In particular, `path.parents[-1]` was a malformed path object with spooky properties. This is addressed by adding `len(self)` to negative indices. (cherry picked from commit f32e6b4) Co-authored-by: Barney Gale <barney.gale@gmail.com>
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
When a
_PathParentsobject has a drive or a root, the length of the object is one less than than the length ofself._parts, which resulted in an off-by-one error whenpath.parents[-n]was fed through toself._parts[:-n - 1]. In particular,path.parents[-1]was a malformed path object with spooky properties.This is addressed by adding
len(self)to negative indices.Issue link: #93156