From 3dde52bea9cdc5cfcbfa94d20a28e134907f1a1a Mon Sep 17 00:00:00 2001
From: AlexAndorra <andorra.alexandre@gmail.com>
Date: Mon, 4 May 2020 19:14:59 +0200
Subject: [PATCH 01/11] Pinned MPL to avoid mutiprocessing MacOS error

---
 RELEASE-NOTES.md | 3 ++-
 requirements.txt | 9 +++++----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index 25fadaaeda..ac6d425ebb 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -27,7 +27,8 @@
 - Moved argument division out of `NegativeBinomial` `random` method. Fixes [#3864](https://github.com/pymc-devs/pymc3/issues/3864) in the style of [#3509](https://github.com/pymc-devs/pymc3/pull/3509).
 - The Dirichlet distribution now raises a ValueError when it's initialized with <= 0 values (see [#3853](https://github.com/pymc-devs/pymc3/pull/3853)).
 - End of sampling report now uses `arviz.InferenceData` internally and avoids storing
-  pointwise log likelihood (see [#3883](https://github.com/pymc-devs/pymc3/pull/3883))
+  pointwise log likelihood (see [#3883](https://github.com/pymc-devs/pymc3/pull/3883)).
+- To avoid crashing multiprocessing on MacOS, matplotlib dependency is pinned to versions < 3.1.1 until [the issue](https://github.com/matplotlib/matplotlib/issues/15410) is resolved (see [#3849](https://github.com/pymc-devs/pymc3/issues/3849)).
 
 ## PyMC3 3.8 (November 29 2019)
 
diff --git a/requirements.txt b/requirements.txt
index 4b10495e21..378c58e2d7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,10 +1,11 @@
 arviz>=0.7.0
-theano>=1.0.4
+fastprogress>=0.2.0
+h5py>=2.7.0
+matplotlib<=3.1.0
 numpy>=1.13.0
-scipy>=0.18.1
 pandas>=0.18.0
 patsy>=0.5.1
-fastprogress>=0.2.0
-h5py>=2.7.0
+scipy>=0.18.1
+theano>=1.0.4
 typing-extensions>=3.7.4
 contextvars; python_version < '3.7'

From 77c1cd0670e40d76c6b8e67aefede86225bc150e Mon Sep 17 00:00:00 2001
From: AlexAndorra <andorra.alexandre@gmail.com>
Date: Tue, 5 May 2020 16:43:47 +0200
Subject: [PATCH 02/11] Force reinstall MPL in test env to override global
 ignore-installed flag

---
 scripts/create_testenv.sh | 49 +++++++++++++++++++--------------------
 1 file changed, 24 insertions(+), 25 deletions(-)

diff --git a/scripts/create_testenv.sh b/scripts/create_testenv.sh
index 8970f0e675..a298b2834c 100755
--- a/scripts/create_testenv.sh
+++ b/scripts/create_testenv.sh
@@ -2,52 +2,51 @@
 
 set -ex # fail on first error, print commands
 
-while test $# -gt 0
-do
-    case "$1" in
-        --global)
-            GLOBAL=1
-            ;;
-        --no-setup)
-            NO_SETUP=1
-            ;;
-    esac
-    shift
+while test $# -gt 0; do
+  case "$1" in
+  --global)
+    GLOBAL=1
+    ;;
+  --no-setup)
+    NO_SETUP=1
+    ;;
+  esac
+  shift
 done
 
 command -v conda >/dev/null 2>&1 || {
-  echo "Requires conda but it is not installed.  Run install_miniconda.sh." >&2;
-  exit 1;
+  echo "Requires conda but it is not installed.  Run install_miniconda.sh." >&2
+  exit 1
 }
 
-ENVNAME="${ENVNAME:-testenv}" # if no ENVNAME is specified, use testenv
+ENVNAME="${ENVNAME:-testenv}"         # if no ENVNAME is specified, use testenv
 PYTHON_VERSION=${PYTHON_VERSION:-3.6} # if no python specified, use 3.6
 
-if [ -z ${GLOBAL} ]
-then
-    if conda env list | grep -q ${ENVNAME}
-    then
-      echo "Environment ${ENVNAME} already exists, keeping up to date"
-    else
-      conda create -n ${ENVNAME} --yes pip python=${PYTHON_VERSION}
-    fi
-    source activate ${ENVNAME}
+if [ -z ${GLOBAL} ]; then
+  if conda env list | grep -q ${ENVNAME}; then
+    echo "Environment ${ENVNAME} already exists, keeping up to date"
+  else
+    conda create -n ${ENVNAME} --yes pip python=${PYTHON_VERSION}
+  fi
+  source activate ${ENVNAME}
 fi
 pip install --upgrade pip
 
 conda install --yes mkl-service
 conda install --yes -c conda-forge python-graphviz
 
-
 #  Install editable using the setup.py
 
 # Travis env is unable to import cached mpl sometimes https://github.com/pymc-devs/pymc3/issues/3423
 pip install --no-cache-dir --ignore-installed -e .
 pip install --no-cache-dir --ignore-installed -r requirements-dev.txt
 
+# Pin MPL until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
+pip install --no-cache-dir --force-reinstall "matplotlib<3.1.1"
+
 # Install untested, non-required code (linter fails without them)
 pip install ipython ipywidgets
 
 if [ -z ${NO_SETUP} ]; then
-    python setup.py build_ext --inplace
+  python setup.py build_ext --inplace
 fi

From 53717d478305e4785fb53ae7f690b105db8da960 Mon Sep 17 00:00:00 2001
From: AlexAndorra <andorra.alexandre@gmail.com>
Date: Tue, 5 May 2020 16:56:38 +0200
Subject: [PATCH 03/11] Install MPL before parsing requirements

---
 scripts/create_testenv.sh | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/scripts/create_testenv.sh b/scripts/create_testenv.sh
index a298b2834c..859f72a0a0 100755
--- a/scripts/create_testenv.sh
+++ b/scripts/create_testenv.sh
@@ -35,18 +35,17 @@ pip install --upgrade pip
 conda install --yes mkl-service
 conda install --yes -c conda-forge python-graphviz
 
-#  Install editable using the setup.py
+# Pin MPL until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
+pip install --no-cache-dir --force-reinstall "matplotlib<3.1.1"
 
 # Travis env is unable to import cached mpl sometimes https://github.com/pymc-devs/pymc3/issues/3423
 pip install --no-cache-dir --ignore-installed -e .
 pip install --no-cache-dir --ignore-installed -r requirements-dev.txt
 
-# Pin MPL until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
-pip install --no-cache-dir --force-reinstall "matplotlib<3.1.1"
-
 # Install untested, non-required code (linter fails without them)
 pip install ipython ipywidgets
 
+#  Install editable using the setup.py
 if [ -z ${NO_SETUP} ]; then
   python setup.py build_ext --inplace
 fi

From 57c535728aa9bd6710cefae3726cd7374fd68606 Mon Sep 17 00:00:00 2001
From: AlexAndorra <andorra.alexandre@gmail.com>
Date: Tue, 5 May 2020 18:35:16 +0200
Subject: [PATCH 04/11] Specify exact MPL version for tests

---
 scripts/create_testenv.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/create_testenv.sh b/scripts/create_testenv.sh
index 859f72a0a0..0edfda3eff 100755
--- a/scripts/create_testenv.sh
+++ b/scripts/create_testenv.sh
@@ -36,7 +36,7 @@ conda install --yes mkl-service
 conda install --yes -c conda-forge python-graphviz
 
 # Pin MPL until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
-pip install --no-cache-dir --force-reinstall "matplotlib<3.1.1"
+pip install --no-cache-dir --force-reinstall matplotlib==3.1.0
 
 # Travis env is unable to import cached mpl sometimes https://github.com/pymc-devs/pymc3/issues/3423
 pip install --no-cache-dir --ignore-installed -e .

From babd3f0263921f2649f47936b84180242ea12753 Mon Sep 17 00:00:00 2001
From: AlexAndorra <andorra.alexandre@gmail.com>
Date: Tue, 5 May 2020 19:20:31 +0200
Subject: [PATCH 05/11] New try for tests, with quotes for matplotlib

---
 scripts/create_testenv.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/create_testenv.sh b/scripts/create_testenv.sh
index 0edfda3eff..ebd834b8d4 100755
--- a/scripts/create_testenv.sh
+++ b/scripts/create_testenv.sh
@@ -36,7 +36,8 @@ conda install --yes mkl-service
 conda install --yes -c conda-forge python-graphviz
 
 # Pin MPL until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
-pip install --no-cache-dir --force-reinstall matplotlib==3.1.0
+pip uninstall matplotlib
+pip install "matplotlib==3.1.0"
 
 # Travis env is unable to import cached mpl sometimes https://github.com/pymc-devs/pymc3/issues/3423
 pip install --no-cache-dir --ignore-installed -e .

From f88f74cdcdd62c2b20aaa8c042d5114e57288493 Mon Sep 17 00:00:00 2001
From: AlexAndorra <andorra.alexandre@gmail.com>
Date: Tue, 5 May 2020 20:40:56 +0200
Subject: [PATCH 06/11] =?UTF-8?q?Don=E2=80=99t=20ask=20for=20confirmation?=
 =?UTF-8?q?=20of=20uninstall=20deletions?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 scripts/create_testenv.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/create_testenv.sh b/scripts/create_testenv.sh
index ebd834b8d4..0c113b8503 100755
--- a/scripts/create_testenv.sh
+++ b/scripts/create_testenv.sh
@@ -36,7 +36,7 @@ conda install --yes mkl-service
 conda install --yes -c conda-forge python-graphviz
 
 # Pin MPL until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
-pip uninstall matplotlib
+pip uninstall matplotlib --yes
 pip install "matplotlib==3.1.0"
 
 # Travis env is unable to import cached mpl sometimes https://github.com/pymc-devs/pymc3/issues/3423

From 7423f0dc8752c49f4f043fb5803bc4d9268a285f Mon Sep 17 00:00:00 2001
From: AlexAndorra <andorra.alexandre@gmail.com>
Date: Wed, 6 May 2020 09:24:13 +0200
Subject: [PATCH 07/11] New try installing matplotlib to pass tests

---
 scripts/create_testenv.sh | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/scripts/create_testenv.sh b/scripts/create_testenv.sh
index 0c113b8503..90a0bc4780 100755
--- a/scripts/create_testenv.sh
+++ b/scripts/create_testenv.sh
@@ -35,9 +35,8 @@ pip install --upgrade pip
 conda install --yes mkl-service
 conda install --yes -c conda-forge python-graphviz
 
-# Pin MPL until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
+# Uninstall then pin Matplotlib until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
 pip uninstall matplotlib --yes
-pip install "matplotlib==3.1.0"
 
 # Travis env is unable to import cached mpl sometimes https://github.com/pymc-devs/pymc3/issues/3423
 pip install --no-cache-dir --ignore-installed -e .

From 05d25c5c290fc03190970e639a7f0c02fa410973 Mon Sep 17 00:00:00 2001
From: AlexAndorra <andorra.alexandre@gmail.com>
Date: Wed, 6 May 2020 10:04:00 +0200
Subject: [PATCH 08/11] Also remove potential conda matplotlib installation

---
 scripts/create_testenv.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/create_testenv.sh b/scripts/create_testenv.sh
index 90a0bc4780..088dc26512 100755
--- a/scripts/create_testenv.sh
+++ b/scripts/create_testenv.sh
@@ -37,6 +37,7 @@ conda install --yes -c conda-forge python-graphviz
 
 # Uninstall then pin Matplotlib until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
 pip uninstall matplotlib --yes
+conda uninstall matplotlib --yes
 
 # Travis env is unable to import cached mpl sometimes https://github.com/pymc-devs/pymc3/issues/3423
 pip install --no-cache-dir --ignore-installed -e .

From 28080996edef5b42e8957988086bbf32ae37817c Mon Sep 17 00:00:00 2001
From: AlexAndorra <andorra.alexandre@gmail.com>
Date: Wed, 6 May 2020 10:38:43 +0200
Subject: [PATCH 09/11] Moved MPL from requirements to requirements-dev

---
 requirements-dev.txt      | 1 +
 requirements.txt          | 1 -
 scripts/create_testenv.sh | 1 -
 3 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/requirements-dev.txt b/requirements-dev.txt
index ec6d74ac00..99aa54aa2e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,6 +3,7 @@ coverage<5.0
 graphviz>=0.8.3
 ipython
 Keras>=2.0.8
+matplotlib<=3.1.0
 nbsphinx>=0.4.2
 nose>=1.3.7
 nose-parameterized==0.6.0
diff --git a/requirements.txt b/requirements.txt
index 378c58e2d7..738349529c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,6 @@
 arviz>=0.7.0
 fastprogress>=0.2.0
 h5py>=2.7.0
-matplotlib<=3.1.0
 numpy>=1.13.0
 pandas>=0.18.0
 patsy>=0.5.1
diff --git a/scripts/create_testenv.sh b/scripts/create_testenv.sh
index 088dc26512..90a0bc4780 100755
--- a/scripts/create_testenv.sh
+++ b/scripts/create_testenv.sh
@@ -37,7 +37,6 @@ conda install --yes -c conda-forge python-graphviz
 
 # Uninstall then pin Matplotlib until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
 pip uninstall matplotlib --yes
-conda uninstall matplotlib --yes
 
 # Travis env is unable to import cached mpl sometimes https://github.com/pymc-devs/pymc3/issues/3423
 pip install --no-cache-dir --ignore-installed -e .

From 1340758b26b6b929f408ab2301b58611d09e4392 Mon Sep 17 00:00:00 2001
From: AlexAndorra <andorra.alexandre@gmail.com>
Date: Wed, 6 May 2020 16:02:19 +0200
Subject: [PATCH 10/11] Reintegrate matplotlib pin in requirements file

---
 requirements-dev.txt      | 1 -
 requirements.txt          | 1 +
 scripts/create_testenv.sh | 4 +++-
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/requirements-dev.txt b/requirements-dev.txt
index 99aa54aa2e..ec6d74ac00 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,7 +3,6 @@ coverage<5.0
 graphviz>=0.8.3
 ipython
 Keras>=2.0.8
-matplotlib<=3.1.0
 nbsphinx>=0.4.2
 nose>=1.3.7
 nose-parameterized==0.6.0
diff --git a/requirements.txt b/requirements.txt
index 738349529c..f8366437c8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,7 @@
 arviz>=0.7.0
 fastprogress>=0.2.0
 h5py>=2.7.0
+matplotlib==3.1.0
 numpy>=1.13.0
 pandas>=0.18.0
 patsy>=0.5.1
diff --git a/scripts/create_testenv.sh b/scripts/create_testenv.sh
index 90a0bc4780..58148714f5 100755
--- a/scripts/create_testenv.sh
+++ b/scripts/create_testenv.sh
@@ -35,7 +35,9 @@ pip install --upgrade pip
 conda install --yes mkl-service
 conda install --yes -c conda-forge python-graphviz
 
-# Uninstall then pin Matplotlib until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
+# Uninstall then pin matplotlib until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
+pip uninstall matplotlib --yes
+# Uninstall second matplotlib present on conda venv
 pip uninstall matplotlib --yes
 
 # Travis env is unable to import cached mpl sometimes https://github.com/pymc-devs/pymc3/issues/3423

From 0cf008e43159dd18a26c223b3d509769799aefcd Mon Sep 17 00:00:00 2001
From: AlexAndorra <andorra.alexandre@gmail.com>
Date: Wed, 6 May 2020 16:29:26 +0200
Subject: [PATCH 11/11] Uninstall third matplotlib on conda env

---
 scripts/create_testenv.sh | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/scripts/create_testenv.sh b/scripts/create_testenv.sh
index 58148714f5..8b0ee16a15 100755
--- a/scripts/create_testenv.sh
+++ b/scripts/create_testenv.sh
@@ -35,10 +35,12 @@ pip install --upgrade pip
 conda install --yes mkl-service
 conda install --yes -c conda-forge python-graphviz
 
-# Uninstall then pin matplotlib until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
+# Uninstall the three matplotlibs present on conda env
 pip uninstall matplotlib --yes
-# Uninstall second matplotlib present on conda venv
 pip uninstall matplotlib --yes
+pip uninstall matplotlib --yes
+# Pin matplotlib until https://github.com/matplotlib/matplotlib/issues/15410 is resolved
+pip install --force-reinstall "matplotlib==3.1.0"
 
 # Travis env is unable to import cached mpl sometimes https://github.com/pymc-devs/pymc3/issues/3423
 pip install --no-cache-dir --ignore-installed -e .