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Fix pytest crashes with hypothesis and pydantic (#3727)

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Pytest (sometimes?) crashes when it is invoked with `-vv` and pydantic and hypthesis are installed.

This is because `_registered(typ)` modifies `_DEFINED_TYPES` while it is being iterated:

```
INTERNALERROR>   File ".../lib/python3.9/site-packages/pydantic/_hypothesis_plugin.py", line 361, in <module>
INTERNALERROR>     for typ in pydantic.types._DEFINED_TYPES:
INTERNALERROR>   File ".../lib/python3.9/_weakrefset.py", line 65, in __iter__
INTERNALERROR>     for itemref in self.data:
INTERNALERROR> RuntimeError: Set changed size during iteration
```
This commit is contained in:
Stefan Scherfke
2022-04-02 16:11:48 +02:00
committed by GitHub
parent f96a6131a3
commit 36c53ceaa3
1 changed files with 1 additions and 1 deletions
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pydantic/_hypothesis_plugin.py
+1 -1
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@@ -358,7 +358,7 @@ def resolve_constr(cls): # type: ignore[no-untyped-def] # pragma: no cover
# Finally, register all previously-defined types, and patch in our new function
for typ in pydantic.types._DEFINED_TYPES:
for typ in list(pydantic.types._DEFINED_TYPES):
_registered(typ)
pydantic.types._registered = _registered
st.register_type_strategy(pydantic.Json, resolve_json)