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@ncoghlan ncoghlan commented Mar 9, 2017

Directory and zipfile execution previously added
the parent directory of the directory or zipfile
as sys.path[0] and then subsequently overwrote
it with the directory or zipfile itself.

This caused problems in isolated mode, as it
overwrote the "stdlib as a zip archive" entry
in sys.path, as the parent directory was
never added.

The attempted fix to that issue in bpo-29319
created the opposite problem in non-isolated
mode, by potentially leaving the parent
directory on sys.path instead of overwriting it.

This change fixes the root cause of the problem
by removing the whole "add-and-overwrite" dance
for sys.path[0], and instead simply never adds
the parent directory to sys.path in the first
place.

Directory and zipfile execution previously added the parent directory of the directory or zipfile as sys.path[0] and then subsequently overwrote it with the directory or zipfile itself. This caused problems in isolated mode, as it overwrote the "stdlib as a zip archive" entry in sys.path, as the parent directory was never added. The attempted fix to that issue in bpo-29319 created the opposite problem in *non*-isolated mode, by potentially leaving the parent directory on sys.path instead of overwriting it. This change fixes the root cause of the problem by removing the whole "add-and-overwrite" dance for sys.path[0], and instead simply never adds the parent directory to sys.path in the first place.
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@ncoghlan, thanks for your PR! By analyzing the history of the files in this pull request, we identified @birkenfeld, @zooba, @vsajip, @vadmium and @orsenthil to be potential reviewers.

@ncoghlan ncoghlan merged commit d2977a3 into python:master Mar 12, 2017
ncoghlan added a commit to ncoghlan/cpython that referenced this pull request Mar 12, 2017
Directory and zipfile execution previously added the parent directory of the directory or zipfile as sys.path[0] and then subsequently overwrote it with the directory or zipfile itself. This caused problems in isolated mode, as it overwrote the "stdlib as a zip archive" entry in sys.path, as the parent directory was never added. The attempted fix to that issue in bpo-29319 created the opposite problem in *non*-isolated mode, by potentially leaving the parent directory on sys.path instead of overwriting it. This change fixes the root cause of the problem by removing the whole "add-and-overwrite" dance for sys.path[0], and instead simply never adds the parent directory to sys.path in the first place. (cherry picked from commit d2977a3)
@ncoghlan ncoghlan deleted the bpo-29723-sys-path-consistency branch March 30, 2018 07:45
jaraco pushed a commit that referenced this pull request Dec 2, 2022
Bumps [sentry-sdk](https://github.com/getsentry/sentry-python) from 1.9.0 to 1.9.6. - [Release notes](https://github.com/getsentry/sentry-python/releases) - [Changelog](https://github.com/getsentry/sentry-python/blob/master/CHANGELOG.md) - [Commits](getsentry/sentry-python@1.9.0...1.9.6) --- updated-dependencies: - dependency-name: sentry-sdk dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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