Backport PR #47979 on branch 1.4.x (DEPS: Update cython) (#48009)

* Backport PR #47979: DEPS: Update cython

* missed one

Author: simonjayhawkins

asv_bench/asv.conf.json

@@ -42,7 +42,7 @@
     // followed by the pip installed packages).
     "matrix": {
         "numpy": [],
-        "Cython": ["0.29.30"],
+        "Cython": ["0.29.32"],
         "matplotlib": [],
         "sqlalchemy": [],
         "scipy": [],

ci/deps/actions-310-numpydev.yaml

@@ -16,7 +16,7 @@ dependencies:
   - pytz
   - pip
   - pip:
-    - cython==0.29.30 # GH#34014
+    - cython==0.29.32
     - "--extra-index-url https://pypi.anaconda.org/scipy-wheels-nightly/simple"
     - "--pre"
     - "numpy"

ci/deps/actions-310.yaml

@@ -5,7 +5,7 @@ dependencies:
   - python=3.10
 
   # test dependencies
-  - cython=0.29.30
+  - cython>=0.29.32
   - pytest>=6.0
   - pytest-cov
   - pytest-xdist>=1.31

ci/deps/actions-38-downstream_compat.yaml

@@ -6,7 +6,7 @@ dependencies:
   - python=3.8
 
   # test dependencies
-  - cython=0.29.30
+  - cython>=0.29.32
   - pytest>=6.0
   - pytest-cov
   - pytest-xdist>=1.31

ci/deps/actions-38-minimum_versions.yaml

@@ -7,7 +7,7 @@ dependencies:
   - python=3.8.0
 
   # test dependencies
-  - cython=0.29.30
+  - cython>=0.29.32
   - pytest>=6.0
   - pytest-cov
   - pytest-xdist>=1.31

ci/deps/actions-38.yaml

@@ -5,7 +5,7 @@ dependencies:
   - python=3.8
 
   # test dependencies
-  - cython=0.29.30
+  - cython>=0.29.32
   - pytest>=6.0
   - pytest-cov
   - pytest-xdist>=1.31

ci/deps/actions-39.yaml

@@ -5,7 +5,7 @@ dependencies:
   - python=3.9
 
   # test dependencies
-  - cython=0.29.30
+  - cython>=0.29.32
   - pytest>=6.0
   - pytest-cov
   - pytest-xdist>=1.31

ci/deps/actions-pypy-38.yaml

@@ -8,7 +8,7 @@ dependencies:
   - python=3.8[build=*_pypy] # TODO: use this once pypy3.8 is available
 
   # tools
-  - cython>=0.29.30
+  - cython>=0.29.32
   - pytest>=6.0
   - pytest-cov
   - pytest-asyncio

ci/deps/circle-38-arm64.yaml

@@ -5,7 +5,7 @@ dependencies:
   - python=3.8
 
   # test dependencies
-  - cython=0.29.30
+  - cython>=0.29.32
   - pytest>=6.0
   - pytest-cov
   - pytest-xdist>=1.31

doc/source/whatsnew/v1.4.4.rst

@@ -14,6 +14,7 @@ including other versions of pandas.
 
 Fixed regressions
 ~~~~~~~~~~~~~~~~~
+- Fixed regression in taking NULL :class:`objects` from a :class:`DataFrame` causing a segmentation violation. These NULL values are created by :meth:`numpy.empty_like` (:issue:`46848`)
 - Fixed regression in :func:`concat` materializing :class:`Index` during sorting even if :class:`Index` was already sorted (:issue:`47501`)
 - Fixed regression in :meth:`DataFrame.loc` not updating the cache correctly after values were set (:issue:`47867`)
 - Fixed regression in :meth:`DataFrame.loc` not aligning index in some cases when setting a :class:`DataFrame` (:issue:`47578`)
@@ -36,7 +37,7 @@ Bug fixes
 
 Other
 ~~~~~
--
+- The minimum version of Cython needed to compile pandas is now ``0.29.32`` (:issue:`47978`)
 -
 
 .. ---------------------------------------------------------------------------