Dependency resolution continues indefinitely

[MycroftKang]

• Poetry version: 1.4.2
• Python version: 3.10.10
• OS version and name: Windows 11 22H2

• I am on the latest stable Poetry version, installed using a recommended method.
• I have searched the issues of this repo and believe that this is not a duplicate.
• I have consulted the FAQ and blog for any relevant entries or release notes.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option) and have included the output below.

Issue

When I try to update the existing dependency to cause a dependency conflict, dependency resolution continues infinitely.
The rasa package used in the reproduction steps below depends on pytz (>=2019.1,<2023.0).

Steps to reproduce

1. First, run poetry install with the following tool.poetry.dependencies:

# pyproject.toml

[tool.poetry.dependencies]
python = "3.10.*"
rasa = {git = "https://github.com/MycroftKang/rasa-cpu.git", rev = "dc276bb975d205daa389551727240437c5131297"}
pytz = "2022.1"

2. Next, change the pytz version from 2022.1 to 2023.3 and run poetry update pytz.

# pyproject.toml

- pytz = "2022.1"
+ pytz = "2023.3"

3. The Resolving dependencies... message is displayed infinitely, and poetry uses over 10GB(!) of memory if you keep waiting.

Debug Mode (-vvv option) Output

Running poetry update -vvv pytz gives the following output infinitely:

1: ! thus: rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 requires pytz (>=2019.1,<202
3.0)
   1: ! rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 is partially satisfied by not rasa
 (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297
   1: ! which is caused by "rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 depends on pyt
z (>=2019.1,<2023.0)"
   1: ! thus: rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 requires pytz (>=2019.1,<202
3.0)
   1: ! rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 is partially satisfied by not rasa
 (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297
   1: ! which is caused by "rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 depends on pyt
z (>=2019.1,<2023.0)"
   1: ! thus: rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 requires pytz (>=2019.1,<202
3.0)
   1: ! rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 is partially satisfied by not rasa
 (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297
   1: ! which is caused by "rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 depends on pyt
z (>=2019.1,<2023.0)"
   1: ! thus: rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 requires pytz (>=2019.1,<202
3.0)
   1: ! rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 is partially satisfied by not rasa
 (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297
   1: ! which is caused by "rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 depends on pyt
z (>=2019.1,<2023.0)"
   1: ! thus: rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 requires pytz (>=2019.1,<202
3.0)

Expected Correct Behavior

If I run poetry install from the beginning with tool.poetry.dependencies as shown below,

# pyproject.toml

[tool.poetry.dependencies]
python = "3.10.*"
rasa = {git = "https://github.com/MycroftKang/rasa-cpu.git", rev = "dc276bb975d205daa389551727240437c5131297"}
pytz = "2023.3"

poetry will exit with the following message.

Updating dependencies
Resolving dependencies... (0.4s)

Because test-poetry depends on rasa (3.4.2) @ git+https://github.com/MycroftKang/rasa-cpu.git@dc276bb975d205daa389551727240437c5131297 which depends on pytz (>=2019.1,<2023.0), pytz is required.
So, because test-poetry depends on pytz (2023.3), version solving failed.

It should be like this even in the case described in the reproduction step above.

[dimbleby]

duplicate #7398, #7760, please close

[MycroftKang]

Closing this as there was a fix for it at #7405 which is not yet released.

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.