[pip-compile] Upgrading a dependency with -P that has extras fails with backtracking resolver #1806
Description
Environment Versions
- Python version: 3.7.5
- pip version: 23.0
- pip-tools version: 6.12.2
Steps to replicate
- Create
requirements.infile.
# requirements.in
googleapis-common-protos[grpc]==1.56.4
google-api-core[grpc]==1.32.0
- Attempt upgrading
googleapis-common-protos[grpc]with-Pand the backtracking resolver
pip-compile -v --resolver backtracking -P googleapis-common-protos\[grpc\] requirements.in
Expected result
pip-compile upgrades googleapis-common-protos\[grpc\] and extra packages.
Actual result
pip._internal.exceptions.InstallationError: Constraints cannot have extras
Note: without --resolver backtracking the call succeeds after multiple rounds.
pip-compile -v -P googleapis-common-protos\[grpc\] requirements.in
Edit: the command also doesn't work with --strip-extras:
$ pip-compile -v --strip-extras --resolver=backtracking -P googleapis-common-protos\[grpc\] requirements.in
pip._internal.exceptions.InstallationError: Constraints cannot have extras