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  File "/home/wesm/miniconda/envs/arrow-dev/bin/ipython", line 11, in <module>
    sys.exit(start_ipython())
  File "/home/wesm/miniconda/envs/arrow-dev/lib/python3.6/site-packages/IPython/__init__.py", line 125, in start_ipython
    return launch_new_instance(argv=argv, **kwargs)
  File "/home/wesm/miniconda/envs/arrow-dev/lib/python3.6/site-packages/traitlets/config/application.py", line 658, in launch_instance
    app.start()
  File "/home/wesm/miniconda/envs/arrow-dev/lib/python3.6/site-packages/IPython/terminal/ipapp.py", line 356, in start
    self.shell.mainloop()
  File "/home/wesm/miniconda/envs/arrow-dev/lib/python3.6/site-packages/IPython/terminal/interactiveshell.py", line 485, in mainloop
    self.interact()

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$ ./lint.sh 
/home/wesm/code/arrow/r/src/array.cpp had clang-format style issues
--- /home/wesm/code/arrow/r/src/array.cpp
+++ /home/wesm/code/arrow/r/src/array.cpp (after clang format)
@@ -40,9 +40,7 @@
 std::shared_ptr<arrow::Array> SimpleArray(SEXP x) {
   Rcpp::Vector<RTYPE> vec(x);
   std::vector<std::shared_ptr<arrow::Buffer>> buffers{
-    nullptr,
-    std::make_shared<SimpleRBuffer<RTYPE>>(vec)

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#!/usr/bin/env bash

export ARROW_CLANG_VERSION=6.0
export ARROW_GCC=gcc
export ARROW_GXX=g++
export ARROW_LLVM_VERSION=$ARROW_CLANG_VERSION

export PYARROW_WITH_ORC=1
export PYARROW_WITH_PARQUET=1
export PYARROW_WITH_PLASMA=1

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-- CMAKE_CXX_FLAGS: -D_GLIBCXX_USE_CXX11_ABI=0 -ggdb -O0  -Weverything -Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-deprecated -Wno-weak-vtables -Wno-padded -Wno-comma -Wno-unused-parameter -Wno-unused-template -Wno-undef -Wno-shadow -Wno-switch-enum -Wno-exit-time-destructors -Wno-global-constructors -Wno-weak-template-vtables -Wno-undefined-reinterpret-cast -Wno-implicit-fallthrough -Wno-unreachable-code-return -Wno-float-equal -Wno-missing-prototypes -Wno-old-style-cast -Wno-covered-switch-default -Wno-cast-align -Wno-vla-extension -Wno-shift-sign-overflow -Wno-used-but-marked-unused -Wno-missing-variable-declarations -Wno-gnu-zero-variadic-macro-arguments -Wconversion -Wno-sign-conversion -Wno-disabled-macro-expansion -Wno-gnu-folding-constant -Wno-reserved-id-macro -Wno-range-loop-analysis -Wno-double-promotion -Wno-undefined-func-template -Wno-zero-as-null-pointer-constant -Wno-unknown-warning-option -Werror -Wno-unknown-warning-option -std=c++11 -msse3 -maltivec -Werror -Qunused-arguments  -fsanit

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In [1]: import pandas as pd

In [2]: ts = pd.Timestamp('2000-01-01 00:00:00')

In [3]: ts
Out[3]: Timestamp('2000-01-01 00:00:00')

In [4]: ts.hour
Out[4]: 0

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# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software

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wesm

DCHECK src/arrow/table.cc:223: ERROR: NULL_DEREFERENCE pointer `returned by column` could be null and is dereferenced at line 223, column 10
DCHECK src/arrow/ipc/writer.cc:140: ERROR: NULL_DEREFERENCE pointer `returned by column` could be null and is dereferenced at line 140, column 7
DCHECK src/arrow/util/bit-util.cc:55: ERROR: NULL_DEREFERENCE pointer `out_buf` last assigned on line 53 could be null and is dereferenced by call to `memset()` at line 55, column 3
DCHECK src/arrow/python/numpy_to_arrow.cc:499: ERROR: NULL_DEREFERENCE pointer `tmp_array` could be null and is dereferenced by call to `arrow::compute::Cast()` at line 499, column 3
CANTHAPPEN src/arrow/compare.cc:142: ERROR: NULL_DEREFERENCE pointer `returned by field` could be null and is dereferenced at line 142, column 24
NOTAPROBLEM src/plasma/client.cc:360: ERROR: EMPTY_VECTOR_ACCESS Vector `&buffer` could be empty and is accessed at line 360, column 5
CANTHAPPEN src/arrow/python/numpy_to_arrow.cc:670: ERROR: NULL_DEREFERENCE pointer `&builder

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{
  "schema": {
    "fields": [
      {
        "name": "dict1",
        "nullable": true,
        "type": {
          "name": "utf8"
        },
        "dictionary": {

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   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    0.000    0.000    0.098    0.098 {built-in method builtins.exec}
        1    0.000    0.000    0.098    0.098 <string>:1(<module>)
        1    0.000    0.000    0.056    0.056 generic.py:4214(groupby)
        1    0.000    0.000    0.056    0.056 groupby.py:1617(groupby)
        1    0.000    0.000    0.055    0.055 groupby.py:363(__init__)
        1    0.000    0.000    0.055    0.055 groupby.py:2483(_get_grouper)
        1    0.007    0.007    0.055    0.055 groupby.py:2581(is_in_axis)
        1    0.000    0.000    0.048    0.048 base.py:2385(get_loc)
        3    0.000    0.000    0.048    0.016 categorical.py:1037(__array__)