Fix _remove_plugin and get_hookcallers for multi-impl plugins #646
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…uplicate When a plugin registers multiple hook implementations on the same hook (e.g. via specname), `_remove_plugin` only removed the first matching hookimpl. This worked because `get_hookcallers` returned duplicate HookCaller entries, causing `_remove_plugin` to be called multiple times. This was fragile and made `get_hookcallers` return unexpected duplicates to callers of the public API. Fix `_remove_plugin` to remove all hookimpls for a plugin in a single call, and fix `get_hookcallers` to return each HookCaller at most once. Closes pytest-dev#431 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
Fixes #431
When a plugin registers multiple hook implementations on the same hook (e.g. via
specname), two related issues exist:HookCaller._remove_plugin()only removes the first matchingHookImplfor a plugin, then returns. This means it relies on being called multiple times to remove all implementations.PluginManager.get_hookcallers()returns duplicateHookCallerentries — one perHookImplrather than one perHookCaller. This happens to compensate for_remove_pluginonly removing one impl per call, but it's incorrect behavior for users of the public API.Changes
_remove_plugin: Remove all hookimpls for the given plugin in a single call using a list comprehension filter, instead of deleting only the first match and returning.get_hookcallers: Break out of the inner loop after finding the first matching hookimpl for a hookcaller, so eachHookCallerappears at most once in the result.get_hookcallersreturns no duplicates.431.bugfix.rsttowncrier fragment.Test plan
uv run pytest)uv run pre-commit run -a)🤖 Generated with Claude Code