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Re-work overload overlap logic #17392

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Merged
merged 13 commits into from
Jun 19, 2024
Merged

Re-work overload overlap logic #17392

merged 13 commits into from
Jun 19, 2024

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ilevkivskyi
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@ilevkivskyi ilevkivskyi commented Jun 16, 2024 •
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Fixes #5510

OK, so I noticed during last couple years, that every other time I change something about type variables, a few unsafe overload overlap errors either appears or disappears. At some point I almost stopped looking at them. The problem is that unsafe overload overlap detection for generic callables is currently ad-hoc. However, as I started working on it, I discovered a bunch of foundational problems (and few smaller issues), so I decided to re-work the unsafe overload overlap detection. Here is a detailed summary:

  • Currently return type compatibility is decided using regular subtype check. IMO this is wrong (I was wrong). Although it is technically correct, in most cases there is nothing wrong if first overload returns list[Subtype] and second returns list[Supertype]. All the unsafe overload story is about runtime values, not static types, so we should use is_subset() instead of is_subtype(), which is IIUC easy to implement: we simply need to consider all invariant types covariant.
  • Current implementation only checks for overlap between parameters, i.e. it checks if there are some calls that are valid for both overloads. But we also need to check that those common calls will not be always caught by the first overload. I assume it was not checked because, naively, we already check elsewhere that first overload doesn't completely shadow the second one. But this is not the same: first overload may be not more general overall, but when narrowed to common calls, it may be more general. Example of such false-positive (this is an oversimplified version of what is often used in situations with many optional positional arguments): 
    @overload
def foo(x: object) -> object: ...
@overload
def foo(x: int = ...) -> int: ...
  • Currently overlap for generic callables is decided using some weird two-way unification procedure, where we actually keep going on (with non-unified variables, and/or <never>) if the right to left unification fails. TBH I never understood this. What we need is to find some set of type variable values that makes two overloads unsafely overlapping. Constraint inference may be used as a (good) source of such guesses, but is not decisive in any way. So instead I simply try all combinations of upper bounds and values. The main benefit of such approach is that it is guaranteed false-positive free. If such algorithm finds an overlap it is definitely an overlap. There are however false negatives, but we can incrementally tighten them in the future.
  • I am making Any overlap nothing when considering overloads. Currently it overlaps everything (i.e. it is not different from object), but this violates the rule that replacing a precise type with Any should not generate an error. IOW I essentially treat Any as "too dynamic or not imported".
  • I extend None special-casing to be more uniform. Now essentially it only overlaps with explicitly optional types. This is important for descriptor-like signatures.
  • Finally, I did a cleanup in is_overlapping_types(), most notably flags were not passed down to various (recursive) helpers, and ParamSpec/Parameters were treated a bit arbitrary.

Pros/cons of the outcome:

  • Pro: simple (even if not 100% accurate) mental model
  • Pro: all major classes of false positives eliminated
  • Pro: couple minor false negatives fixed
  • Con: two new false negatives added, more details below

So here a two new false negatives and motivation on why I think they are OK. First example is

T = TypeVar("T")

@overload
def foo(x: str) -> int: ...
@overload
def foo(x: T) -> T: ...
def foo(x):
    if isinstance(x, str):
        return 0
    return x

This is obviously unsafe (consider T = float), but not flagged after this PR. I think this is ~fine for two reasons:

  • There is no good alternative for a user, the error is not very actionable. Using types like (str | T) -> int | T is a bad idea because unions with type variables are not only imprecise, but also highly problematic for inference.
  • The false negative is mostly affecting unbounded type variables, if a "suspicious" bound is used (like bound=float in this example), the error will be still reported.

Second example is signatures like

@overload
def foo(x: str, y: str) -> str: ...
@overload
def foo(*args: str) -> int: ...

@overload
def bar(*, x: str, y: str) -> str: ...
@overload
def bar(**kwds: str) -> int: ...

These are also unsafe because one can fool mypy with x: tuple[str, ...] = ("x", "y"); foo(*x) and x: dict[str, str] = {"x": "x", "y": "y"}; bar(**x). I think this is OK because while such unsafe calls are quite rare, this kind of catch-all fallback as last overload is relatively common.

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@ilevkivskyi ilevkivskyi marked this pull request as ready for review June 17, 2024 23:41
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@JukkaL
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JukkaL commented Jun 18, 2024

Various tests are failing, can you have a look?

@ilevkivskyi
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Various tests are failing, can you have a look?

There is only one test failing testConfigFollowImportsSysPath, because of a real bug in typeshed.

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JukkaL commented Jun 18, 2024

Our checks for overlapping overload items have been pretty ad-hoc and they've generated false positives, so thanks for cleaning this up! This looks good. I think the false negatives are acceptable, and false positives here generally cause more issues than (rare) false negatives.

The only potential issue (based on a quick review) is missing test coverage. Do we have tests for these things:

  • Subset logic for return types (other than the removed type ignore)
  • Any overlap changes
  • None overlap changes

Unless I am missing something, there is nothing wrong if first overload returns list[Subtype] and second returns list[Supertype]

Technically these could refer to different objects that are defined outside the function (e.g. attributes), and thus the caller could add values of type Supertype to a list[Subtype]. This seems unlikely enough that we don't need to care about this.

@JukkaL JukkaL mentioned this pull request Jun 18, 2024
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@JelleZijlstra
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because of a real bug in typeshed

Seems like it's complaining about these overloads for pow(): https://github.com/python/typeshed/blob/c303b3221e7cb487e21791833bf60b09f51b6c48/stdlib/builtins.pyi#L1676 . I haven't fully worked through the protocols but they probably do overlap unsafely. The best solution may be to add a type ignore here, though.

To unblock this PR you could add the type ignore directly in mypy's vendored copy of typeshed; then we can also add the ignore in typeshed.

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@ilevkivskyi
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Technically these could refer to different objects that are defined outside the function (e.g. attributes), and thus the caller could add values of type Supertype to a list[Subtype]. This seems unlikely enough that we don't need to care about this.

Oh yes, right. I added an explicit comment about this, to make it clear.

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I fixed another minor (Any vs object) inconsistency in is_overlapping_types(). I ignored the errors in typeshed as @JelleZijlstra suggested. I also added a note when the error can be fixed by flipping the order. I am now happy with with mypy_primer output.

@JukkaL I added dedicated (explicit) tests for edge cases as you suggested.

If there are no more suggestions, I am going to merge this soon.

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Diff from mypy_primer, showing the effect of this PR on open source code:

comtypes (https://github.com/enthought/comtypes)
- comtypes/hints.pyi:221: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]
- comtypes/hints.pyi:229: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]

jinja (https://github.com/pallets/jinja)
+ src/jinja2/environment.py:711: error: Unused "type: ignore" comment  [unused-ignore]

steam.py (https://github.com/Gobot1234/steam.py)
- steam/ext/commands/commands.py:695: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- steam/ext/commands/commands.py:741: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- steam/ext/commands/commands.py:795: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- steam/ext/commands/commands.py:844: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- steam/ext/commands/commands.py:906: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]

antidote (https://github.com/Finistere/antidote)
- src/antidote/core/_catalog.py:265: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]
- src/antidote/core/__init__.py:144: error: Overloaded function signatures 5 and 6 overlap with incompatible return types  [overload-overlap]
+ src/antidote/core/__init__.py:192: error: Overloaded function signatures 1 and 3 overlap with incompatible return types  [overload-overlap]
+ src/antidote/core/__init__.py:197: note: Flipping the order of overloads will fix this error
+ src/antidote/core/__init__.py:398: note: Flipping the order of overloads will fix this error
+ src/antidote/lib/interface_ext/_interface.py:78: note: Flipping the order of overloads will fix this error
+ src/antidote/lib/interface_ext/_interface.py:118: note: Flipping the order of overloads will fix this error
+ src/antidote/lib/interface_ext/__init__.py:357: note: Flipping the order of overloads will fix this error
+ src/antidote/lib/interface_ext/__init__.py:396: note: Flipping the order of overloads will fix this error
+ src/antidote/lib/interface_ext/__init__.py:1207: note: Flipping the order of overloads will fix this error
- src/antidote/lib/interface_ext/__init__.py:1293: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- src/antidote/lib/interface_ext/__init__.py:1293: error: Overloaded function signatures 2 and 4 overlap with incompatible return types  [overload-overlap]
- src/antidote/lib/interface_ext/__init__.py:1325: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- src/antidote/lib/interface_ext/__init__.py:1325: error: Overloaded function signatures 2 and 4 overlap with incompatible return types  [overload-overlap]

itsdangerous (https://github.com/pallets/itsdangerous)
+ src/itsdangerous/timed.py:57: error: Unused "type: ignore" comment  [unused-ignore]

mypy (https://github.com/python/mypy)
+ mypy/types.py:3098: error: Unused "type: ignore" comment  [unused-ignore]

aioredis (https://github.com/aio-libs/aioredis)
- aioredis/utils.py:45: error: Unused "type: ignore" comment, use narrower [overload-overlap] instead of [misc] code  [unused-ignore]
+ aioredis/utils.py:45: error: Unused "type: ignore" comment  [unused-ignore]

asynq (https://github.com/quora/asynq)
+ asynq/decorators.pyi:107: error: Unused "type: ignore" comment  [unused-ignore]

pandas-stubs (https://github.com/pandas-dev/pandas-stubs)
+ pandas-stubs/core/series.pyi:234: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:251: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:261: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:271: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:287: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:772: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:908: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:1240: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:1509: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:1543: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:1556: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:1560: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:1575: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:1579: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:1584: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:1588: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:1608: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/series.pyi:1992: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/frame.pyi:193: error: Overloaded function signatures 3 and 4 overlap with incompatible return types  [overload-overlap]
+ pandas-stubs/core/frame.pyi:309: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/frame.pyi:325: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/frame.pyi:333: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/frame.pyi:341: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/frame.pyi:349: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/frame.pyi:1220: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/frame.pyi:1231: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/algorithms.pyi:27: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/algorithms.pyi:31: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/reshape/tile.pyi:53: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/reshape/concat.pyi:27: error: Overloaded function signatures 1 and 4 overlap with incompatible return types  [overload-overlap]
+ pandas-stubs/core/indexes/interval.pyi:309: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:69: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:80: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:91: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:102: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:113: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:128: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:140: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:151: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:162: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:173: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:184: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:195: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:206: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:217: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/indexes/base.pyi:422: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/groupby/generic.pyi:188: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/core/groupby/generic.pyi:323: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/_libs/interval.pyi:204: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/_libs/interval.pyi:212: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas-stubs/_libs/tslibs/timedeltas.pyi:251: error: Unused "type: ignore" comment  [unused-ignore]

jax (https://github.com/google/jax)
+ jax/_src/api.py:2280: error: Unused "type: ignore" comment  [unused-ignore]
- jax/_src/numpy/lax_numpy.py:1866: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]
- jax/numpy/__init__.pyi:914: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]

operator (https://github.com/canonical/operator)
- ops/pebble.py:2534: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]
- ops/model.py:2748: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]

streamlit (https://github.com/streamlit/streamlit)
- lib/streamlit/elements/widgets/multiselect.py:61: error: Unused "type: ignore" comment, use narrower [overload-overlap] instead of [misc] code  [unused-ignore]
+ lib/streamlit/elements/widgets/multiselect.py:61: error: Unused "type: ignore" comment  [unused-ignore]

ibis (https://github.com/ibis-project/ibis)
- ibis/expr/operations/udf.py:183: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]
- ibis/expr/operations/udf.py:258: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]
- ibis/expr/operations/udf.py:378: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]
- ibis/expr/operations/udf.py:475: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]
- ibis/expr/operations/udf.py:568: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]

discord.py (https://github.com/Rapptz/discord.py)
- discord/state.py:1225: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]
- discord/channel.py:291: error: Overloaded function signatures 1 and 3 overlap with incompatible return types  [overload-overlap]
- discord/channel.py:295: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- discord/channel.py:1351: error: Overloaded function signatures 1 and 3 overlap with incompatible return types  [overload-overlap]
- discord/channel.py:1355: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- discord/channel.py:1692: error: Overloaded function signatures 1 and 3 overlap with incompatible return types  [overload-overlap]
- discord/channel.py:1696: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- discord/channel.py:1876: error: Overloaded function signatures 1 and 3 overlap with incompatible return types  [overload-overlap]
- discord/channel.py:1880: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- discord/channel.py:2395: error: Overloaded function signatures 1 and 3 overlap with incompatible return types  [overload-overlap]
- discord/channel.py:2399: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- discord/app_commands/tree.py:611: error: Overloaded function signatures 1 and 4 overlap with incompatible return types  [overload-overlap]
- discord/app_commands/tree.py:620: error: Overloaded function signatures 2 and 4 overlap with incompatible return types  [overload-overlap]
- discord/app_commands/tree.py:629: error: Overloaded function signatures 3 and 4 overlap with incompatible return types  [overload-overlap]
- discord/ext/commands/core.py:1729: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]
- discord/ext/commands/core.py:1799: error: Overloaded function signatures 1 and 2 overlap with incompatible return types  [overload-overlap]

bokeh (https://github.com/bokeh/bokeh)
+ src/bokeh/embed/standalone.py:136: error: Unused "type: ignore" comment  [unused-ignore]
+ src/bokeh/embed/standalone.py:143: error: Unused "type: ignore" comment  [unused-ignore]
+ src/bokeh/embed/standalone.py:150: error: Unused "type: ignore" comment  [unused-ignore]

werkzeug (https://github.com/pallets/werkzeug)
+ src/werkzeug/wrappers/request.py:373: error: Unused "type: ignore" comment  [unused-ignore]

hydra-zen (https://github.com/mit-ll-responsible-ai/hydra-zen)
- src/hydra_zen/typing/_builds_overloads.py:46: error: Overloaded function signatures 1 and 4 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:46: error: Overloaded function signatures 1 and 6 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:66: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:86: error: Overloaded function signatures 3 and 5 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:86: error: Overloaded function signatures 3 and 6 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:106: error: Overloaded function signatures 4 and 5 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:106: error: Overloaded function signatures 4 and 6 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:127: error: Overloaded function signatures 5 and 8 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:269: error: Overloaded function signatures 1 and 5 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:269: error: Overloaded function signatures 1 and 7 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:288: error: Overloaded function signatures 2 and 6 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:288: error: Overloaded function signatures 2 and 7 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:307: error: Overloaded function signatures 3 and 4 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:307: error: Overloaded function signatures 3 and 6 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:307: error: Overloaded function signatures 3 and 7 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:326: error: Overloaded function signatures 4 and 6 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:326: error: Overloaded function signatures 4 and 7 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:346: error: Overloaded function signatures 5 and 6 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:346: error: Overloaded function signatures 5 and 7 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:367: error: Overloaded function signatures 6 and 9 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/typing/_builds_overloads.py:507: error: Overloaded function signatures 1 and 6 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/structured_configs/_implementations.py:1377: error: Overloaded function signatures 1 and 4 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/structured_configs/_implementations.py:1377: error: Overloaded function signatures 1 and 6 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/structured_configs/_implementations.py:1397: error: Overloaded function signatures 2 and 3 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/structured_configs/_implementations.py:1418: error: Overloaded function signatures 3 and 5 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/structured_configs/_implementations.py:1418: error: Overloaded function signatures 3 and 6 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/structured_configs/_implementations.py:1440: error: Overloaded function signatures 4 and 5 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/structured_configs/_implementations.py:1440: error: Overloaded function signatures 4 and 6 overlap with incompatible return types  [overload-overlap]
- src/hydra_zen/structured_configs/_implementations.py:1462: error: Overloaded function signatures 5 and 8 overlap with incompatible return types  [overload-overlap]
+ src/hydra_zen/structured_configs/_implementations.py:2973: error: Overloaded function signatures 3 and 4 overlap with incompatible return types  [overload-overlap]
+ src/hydra_zen/structured_configs/_just.py:48: error: Overloaded function signatures 3 and 4 overlap with incompatible return types  [overload-overlap]

@ilevkivskyi ilevkivskyi merged commit 7cb733a into python:master Jun 19, 2024
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@ilevkivskyi ilevkivskyi deleted the overload-overlap branch June 19, 2024 22:48
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Successfully merging this pull request may close these issues.

Moving an overloaded generic function into a class can sometimes introduce "incompatible return type" errors
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@ilevkivskyi @JukkaL @JelleZijlstra @hauntsaninja