BUG: Raise TypeError for mismatched signed/unsigned dtypes

Author: Aniketsy

pandas/core/arrays/interval.py

@@ -533,6 +533,20 @@ def from_arrays(
         copy: bool = False,
         dtype: Dtype | None = None,
     ) -> Self:
+        # Check for mismatched signed/unsigned integer dtypes
+        left_dtype = getattr(left, "dtype", None)
+        right_dtype = getattr(right, "dtype", None)
+        if (
+            left_dtype is not None
+            and right_dtype is not None
+            and left_dtype.kind in "iu"
+            and right_dtype.kind in "iu"
+            and left_dtype.kind != right_dtype.kind
+        ):
+            raise TypeError(
+                f"Left and right arrays must have matching signedness. "
+                f"Got {left_dtype} and {right_dtype}."
+            )
         left = _maybe_convert_platform_interval(left)
         right = _maybe_convert_platform_interval(right)
 

pandas/core/indexes/interval.py

@@ -310,20 +310,6 @@ def from_arrays(
         copy: bool = False,
         dtype: Dtype | None = None,
     ) -> IntervalIndex:
-        # Check for mismatched signed/unsigned integer dtypes
-        left_dtype = getattr(left, "dtype", None)
-        right_dtype = getattr(right, "dtype", None)
-        if (
-            left_dtype is not None
-            and right_dtype is not None
-            and left_dtype.kind in "iu"
-            and right_dtype.kind in "iu"
-            and left_dtype.kind != right_dtype.kind
-        ):
-            raise TypeError(
-                f"Left and right arrays must have matching signedness. "
-                f"Got {left_dtype} and {right_dtype}."
-            )
         with rewrite_exception("IntervalArray", cls.__name__):
             array = IntervalArray.from_arrays(
                 left, right, closed, copy=copy, dtype=dtype