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conformance: add notes about changed mypy behavior in 1.20.0 #2255

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rchen152 merged 1 commit into from
Apr 8, 2026
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conformance: add notes about changed mypy behavior in 1.20.0 #2255

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1 change: 1 addition & 0 deletions conformance/results/mypy/dataclasses_descriptors.toml
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
conformant = "Partial"
notes = """
Assumes descriptor behavior only when field is assigned in class body.
Does not correctly evaluate type of descriptor access.
"""
output = """
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1 change: 1 addition & 0 deletions conformance/results/mypy/tuples_type_compat.toml
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@@ -1,6 +1,7 @@
conformant = "Partial"
notes = """
Does not support tuple narrowing based on `len()` type guard (optional).
Incorrectly marks a match case as unreachable.
"""
output = """
tuples_type_compat.py:15: error: Incompatible types in assignment (expression has type "tuple[float, complex]", variable has type "tuple[int, int]") [assignment]
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4 changes: 2 additions & 2 deletions conformance/results/results.html
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Expand Up @@ -814,7 +814,7 @@ <h3>Python Type System Conformance Test Results</h3>
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/dataclasses.html">Dataclasses</a>
</th></tr>
<tr><th class="column col1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dataclasses_descriptors</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not correctly evaluate type of descriptor access.</p></span></div></th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Assumes descriptor behavior only when field is assigned in class body.</p><p>Does not correctly evaluate type of descriptor access.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>* Assumes descriptor behavior only when field is assigned in class body</p><p>* Doesn't allow non-data descriptors or data descriptors with differing `__get__` and `__set__` types</p></span></div></th>
Expand Down Expand Up @@ -1030,7 +1030,7 @@ <h3>Python Type System Conformance Test Results</h3>
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/tuples.html">Tuples</a>
</th></tr>
<tr><th class="column col1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;tuples_type_compat</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not support tuple narrowing based on `len()` type guard (optional).</p></span></div></th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not support tuple narrowing based on `len()` type guard (optional).</p><p>Incorrectly marks a match case as unreachable.</p></span></div></th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly marks a match case as unreachable.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
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