bpo-34541: pathlib.Path.iterdir throw an exception when path is not valid

.gitattributes

@@ -37,3 +37,20 @@ Lib/test/test_importlib/data01/* -text
 *.proj text eol=crlf
 PCbuild/readme.txt text eol=crlf
 PC/readme.txt text eol=crlf
+
+# Generated files
+# https://github.com/github/linguist#generated-code
+Include/graminit.h          linguist-generated=true
+Python/graminit.h           linguist-generated=true
+Modules/clinic/*.h          linguist-generated=true
+Objects/clinic/*.h          linguist-generated=true
+PC/clinic/*.h               linguist-generated=true
+Python/clinic/*.h           linguist-generated=true
+Python/importlib.h          linguist-generated=true
+Python/importlib_external.h linguist-generated=true
+Include/Python-ast.h        linguist-generated=true
+Python/Python-ast.c         linguist-generated=true
+Include/opcode.h            linguist-generated=true
+Python/opcode_targets.h     linguist-generated=true
+Objects/typeslots.inc       linguist-generated=true
+Modules/unicodedata_db.h    linguist-generated=true

.github/CONTRIBUTING.rst

@@ -8,6 +8,10 @@ Build Status
 
   + `Stable buildbots <http://buildbot.python.org/3.x.stable/>`_
 
+- 3.7
+
+  + `Stable buildbots <http://buildbot.python.org/3.7.stable/>`_
+
 - 3.6
 
   + `Stable buildbots <http://buildbot.python.org/3.6.stable/>`_

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,9 +1,11 @@
 !!! If this is a backport PR (PR made against branches other than `master`),
 please ensure that the PR title is in the following format:
+
 ```
 [X.Y] <title from the original PR> (GH-NNNN)
 ```
-Where: [X.Y] is the branch name, e.g. [3.6].
+
+Where: [X.Y] is the branch name, e.g. [3.7].
 
 GH-NNNN refers to the PR number from `master`.
 

.github/appveyor.yml

@@ -7,12 +7,32 @@ branches:
     - buildbot-custom
 cache:
   - externals -> PCbuild\*
+before_build:
+  - ps: |+
+      if ($env:APPVEYOR_RE_BUILD) {
+        echo 'Doing full build due to re-build request.'
+      } elseif (!$env:APPVEYOR_PULL_REQUEST_HEAD_COMMIT) {
+        echo 'Not a PR, doing full build.'
+      } else {
+        git fetch -q origin +refs/heads/$env:APPVEYOR_REPO_BRANCH
+        $mergebase = git merge-base HEAD FETCH_HEAD
+        $changes = git diff --name-only HEAD $mergebase | grep -vE '(\.rst$)|(^Doc)|(^Misc)'
+        If (!$changes) {
+          echo 'Only docs were updated, stopping build process.'
+          Exit-AppveyorBuild
+        } else {
+          echo 'Doing full build due to non-doc changes in these files:'
+          echo $changes
+        }
+      }
+
+
 build_script:
-- cmd: PCbuild\build.bat -e
-- cmd: PCbuild\win32\python.exe -m test.pythoninfo
+  - cmd: PCbuild\build.bat -e
+  - cmd: PCbuild\win32\python.exe -m test.pythoninfo
 test_script:
-- cmd: PCbuild\rt.bat -q -uall -u-cpu -rwW --slowest --timeout=1200 --fail-env-changed -j0
+  - cmd: PCbuild\rt.bat -q -uall -u-cpu -u-largefile -rwW --slowest --timeout=1200 --fail-env-changed -j0
 environment:
   HOST_PYTHON: C:\Python36\python.exe
 image:
-- Visual Studio 2017
+  - Visual Studio 2017

.gitignore

@@ -113,3 +113,4 @@ Tools/ssl/amd64
 Tools/ssl/win32
 .vs/
 .vscode/
+gmon.out