From ae9d21f98afd2862a9d632f0b05ea99fecc674b1 Mon Sep 17 00:00:00 2001
From: Juergen Buchmueller <pullmoll@t-online.de>
Date: Sat, 31 Dec 2016 17:48:59 +0100
Subject: [PATCH] python: fix i686 semaphore locking

Closes #5432
---
 .../patches/fix-i686-semaphore_lock.patch     | 19 +++++++++++++++++++
 srcpkgs/python/template                       |  2 +-
 2 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 srcpkgs/python/patches/fix-i686-semaphore_lock.patch

diff --git a/srcpkgs/python/patches/fix-i686-semaphore_lock.patch b/srcpkgs/python/patches/fix-i686-semaphore_lock.patch
new file mode 100644
index 00000000000..625e73ef11f
--- /dev/null
+++ b/srcpkgs/python/patches/fix-i686-semaphore_lock.patch
@@ -0,0 +1,19 @@
+Make sure sval is set before comparing it with self->maxvalue.
+Compare only if the return value was zero.
+This fixes "ValueError: semaphore or lock released too many times"
+which occured only for i686.
+
+--- Modules/_multiprocessing/semaphore.c	2016-12-17 21:05:07.000000000 +0100
++++ Modules/_multiprocessing/semaphore.c	2016-12-31 17:42:30.429238082 +0100
+@@ -382,9 +382,10 @@
+ 
+         /* This check is not an absolute guarantee that the semaphore
+            does not rise above maxvalue. */
++        int res = sem_getvalue(self->handle, &sval);
+         if (sem_getvalue(self->handle, &sval) < 0) {
+             return PyErr_SetFromErrno(PyExc_OSError);
+-        } else if (sval >= self->maxvalue) {
++        } else if (res == 0 && sval >= self->maxvalue) {
+            PyErr_SetString(PyExc_ValueError, "semaphore or lock "
+                            "released too many times");
+            return NULL;
diff --git a/srcpkgs/python/template b/srcpkgs/python/template
index bea4ee9a4d2..f25f523bc75 100644
--- a/srcpkgs/python/template
+++ b/srcpkgs/python/template
@@ -4,7 +4,7 @@
 #
 pkgname=python
 version=2.7.13
-revision=1
+revision=2
 wrksrc="Python-${version}"
 hostmakedepends="pkg-config"
 makedepends="