From 24fdef4e45b7b1082588538c2fd5b8efd08f2c1f Mon Sep 17 00:00:00 2001
From: jbrockmendel <jbrockmendel@gmail.com>
Date: Thu, 6 Aug 2020 19:20:03 -0700
Subject: [PATCH] Backport PR #35590: BUG: validate index/data length match in
 DataFrame construction

---
 doc/source/whatsnew/v1.1.1.rst          | 4 ++++
 pandas/core/internals/blocks.py         | 3 ---
 pandas/core/internals/managers.py       | 2 +-
 pandas/tests/frame/test_constructors.py | 6 ++++++
 4 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/doc/source/whatsnew/v1.1.1.rst b/doc/source/whatsnew/v1.1.1.rst
index 5e36bfe6b6307..7db609fba5d68 100644
--- a/doc/source/whatsnew/v1.1.1.rst
+++ b/doc/source/whatsnew/v1.1.1.rst
@@ -50,6 +50,10 @@ Categorical
 
 -
 
+**DataFrame**
+- Bug in :class:`DataFrame` constructor failing to raise ``ValueError`` in some cases when data and index have mismatched lengths (:issue:`33437`)
+-
+
 .. ---------------------------------------------------------------------------
 
 .. _whatsnew_111.contributors:
diff --git a/pandas/core/internals/blocks.py b/pandas/core/internals/blocks.py
index 6ca6eca1ff829..f4f4a3666a84e 100644
--- a/pandas/core/internals/blocks.py
+++ b/pandas/core/internals/blocks.py
@@ -105,7 +105,6 @@ class Block(PandasObject):
     is_extension = False
     _can_hold_na = False
     _can_consolidate = True
-    _verify_integrity = True
     _validate_ndim = True
 
     @classmethod
@@ -1525,7 +1524,6 @@ class ExtensionBlock(Block):
     """
 
     _can_consolidate = False
-    _verify_integrity = False
     _validate_ndim = False
     is_extension = True
 
@@ -2613,7 +2611,6 @@ def _replace_coerce(
 class CategoricalBlock(ExtensionBlock):
     __slots__ = ()
     is_categorical = True
-    _verify_integrity = True
     _can_hold_na = True
 
     should_store = Block.should_store
diff --git a/pandas/core/internals/managers.py b/pandas/core/internals/managers.py
index 895385b170c91..0ce2408eb003e 100644
--- a/pandas/core/internals/managers.py
+++ b/pandas/core/internals/managers.py
@@ -312,7 +312,7 @@ def _verify_integrity(self) -> None:
         mgr_shape = self.shape
         tot_items = sum(len(x.mgr_locs) for x in self.blocks)
         for block in self.blocks:
-            if block._verify_integrity and block.shape[1:] != mgr_shape[1:]:
+            if block.shape[1:] != mgr_shape[1:]:
                 raise construction_error(tot_items, block.shape[1:], self.axes)
         if len(self.items) != tot_items:
             raise AssertionError(
diff --git a/pandas/tests/frame/test_constructors.py b/pandas/tests/frame/test_constructors.py
index a4ed548264d39..b78bb1c492ef4 100644
--- a/pandas/tests/frame/test_constructors.py
+++ b/pandas/tests/frame/test_constructors.py
@@ -2619,6 +2619,12 @@ class DatetimeSubclass(datetime):
         data = pd.DataFrame({"datetime": [DatetimeSubclass(2020, 1, 1, 1, 1)]})
         assert data.datetime.dtype == "datetime64[ns]"
 
+    def test_with_mismatched_index_length_raises(self):
+        # GH#33437
+        dti = pd.date_range("2016-01-01", periods=3, tz="US/Pacific")
+        with pytest.raises(ValueError, match="Shape of passed values"):
+            DataFrame(dti, index=range(4))
+
 
 class TestDataFrameConstructorWithDatetimeTZ:
     def test_from_dict(self):