dev-python/flask: Backport PyPy3 fix, #601298

dev-python/flask/files/flask-0.11.1-pypy3.patch

@@ -0,0 +1,45 @@
+From 6e46d0cd3969f6c13ff61c95c81a975192232fed Mon Sep 17 00:00:00 2001
+From: Markus Unterwaditzer <markus@unterwaditzer.net>
+Date: Mon, 13 Jun 2016 20:29:21 +0200
+Subject: [PATCH] Fix PyPy3 support and add bug references
+
+Fix #1841
+---
+ flask/_compat.py | 18 +++++++++++++-----
+ 2 files changed, 20 insertions(+), 5 deletions(-)
+
+diff --git a/flask/_compat.py b/flask/_compat.py
+index bfe607d..071628f 100644
+--- a/flask/_compat.py
++++ b/flask/_compat.py
+@@ -65,17 +65,25 @@ def __new__(cls, name, this_bases, d):
+ 
+ 
+ # Certain versions of pypy have a bug where clearing the exception stack
+-# breaks the __exit__ function in a very peculiar way.  This is currently
+-# true for pypy 2.2.1 for instance.  The second level of exception blocks
+-# is necessary because pypy seems to forget to check if an exception
+-# happened until the next bytecode instruction?
++# breaks the __exit__ function in a very peculiar way.  The second level of
++# exception blocks is necessary because pypy seems to forget to check if an
++# exception happened until the next bytecode instruction?
++#
++# Relevant PyPy bugfix commit:
++# https://bitbucket.org/pypy/pypy/commits/77ecf91c635a287e88e60d8ddb0f4e9df4003301
++# According to ronan on #pypy IRC, it is released in PyPy2 2.3 and later
++# versions.
++#
++# Ubuntu 14.04 has PyPy 2.2.1, which does exhibit this bug.
+ BROKEN_PYPY_CTXMGR_EXIT = False
+ if hasattr(sys, 'pypy_version_info'):
+     class _Mgr(object):
+         def __enter__(self):
+             return self
+         def __exit__(self, *args):
+-            sys.exc_clear()
++            if hasattr(sys, 'exc_clear'):
++                # Python 3 (PyPy3) doesn't have exc_clear
++                sys.exc_clear()
+     try:
+         try:
+             with _Mgr():

dev-python/flask/flask-0.11.1-r1.ebuild

@@ -33,9 +33,13 @@ DEPEND="${RDEPEND}
 S="${WORKDIR}/${MY_P}"
 
 python_prepare_all() {
-	 # Prevent un-needed d'loading
+	# Prevent un-needed d'loading
 	sed -e "s/ 'sphinx.ext.intersphinx',//" -i docs/conf.py || die
 
+	local PATCHES=(
+		"${FILESDIR}"/${P}-pypy3.patch
+	)
+
 	distutils-r1_python_prepare_all
 }