Your message dated Sat, 16 May 2026 10:23:18 +0000
with message-id <[email protected]>
and subject line Released with 13.5
has caused the Debian Bug report #1135867,
regarding trixie-pu: package python3-lxc/1:5.0.0-2+deb13u1
to be marked as done.
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--
1135867: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1135867
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--- Begin Message ---
Package: release.debian.org
Severity: normal
Tags: trixie
User: [email protected]
Usertags: pu
X-Debbugs-Cc: [email protected],
[email protected], [email protected]
Control: affects -1 + src:python3-lxc
[ Reason ]
It turns out that the Python 3 bindings for lxc don't actually work
with Python 3.13+ due to depending on deprecated functions in the
Python C bindings. This cherry-picks the small upstream patch to fix
things.
[ Impact ]
The lxc Python bindings are broken in trixie.
[ Tests ]
A small POC is provided at
https://github.com/lxc/python3-lxc/issues/35, which I've verified
currently fails in trixie, but works as expected with the patch
applied.
[ Risks ]
Minor/none -- one targeted fix cherry-picked from the upstream git
repo.
[ Checklist ]
[*] *all* changes are documented in the d/changelog
[*] I reviewed all changes and I approve them
[*] attach debdiff against the package in (old)stable
[*] the issue is verified as fixed in unstable
[ Changes ]
One patch as outlined above.
[ Other info ]
The source debdiff is attached.
diff -Nru python3-lxc-5.0.0/debian/changelog python3-lxc-5.0.0/debian/changelog
--- python3-lxc-5.0.0/debian/changelog 2024-04-14 01:13:37.000000000 +0000
+++ python3-lxc-5.0.0/debian/changelog 2026-05-06 19:13:17.000000000 +0000
@@ -1,3 +1,10 @@
+python3-lxc (1:5.0.0-2+deb13u1) trixie; urgency=medium
+
+ * Cherry-pick upstream fix for compatibility with Python 3.13+
+ (Closes: #1135733)
+
+ -- Mathias Gibbens <[email protected]> Wed, 06 May 2026 19:13:17 +0000
+
python3-lxc (1:5.0.0-2) unstable; urgency=medium
* d/control:
diff -Nru python3-lxc-5.0.0/debian/gbp.conf python3-lxc-5.0.0/debian/gbp.conf
--- python3-lxc-5.0.0/debian/gbp.conf 2024-04-14 01:13:37.000000000 +0000
+++ python3-lxc-5.0.0/debian/gbp.conf 2026-05-06 19:13:11.000000000 +0000
@@ -1,3 +1,3 @@
[DEFAULT]
pristine-tar = True
-debian-branch = debian/unstable
+debian-branch = debian/trixie
diff -Nru python3-lxc-5.0.0/debian/patches/001-cherry-pick-python-313-fix.patch python3-lxc-5.0.0/debian/patches/001-cherry-pick-python-313-fix.patch
--- python3-lxc-5.0.0/debian/patches/001-cherry-pick-python-313-fix.patch 1970-01-01 00:00:00.000000000 +0000
+++ python3-lxc-5.0.0/debian/patches/001-cherry-pick-python-313-fix.patch 2026-05-06 19:13:13.000000000 +0000
@@ -0,0 +1,48 @@
+From 5c603a76658d7d278086682ad4481d4c792224f4 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andreas=20V=C3=B6gele?= <[email protected]>
+Date: Tue, 13 May 2025 12:07:36 +0200
+Subject: [PATCH] Replace the deprecated PyOS_AfterFork() function
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Container_attach_and_possibly_wait() fails in Python 3.13 with
+"PyMutex_Unlock: unlocking mutex that is not locked" if PyOS_AfterFork()
+is used.
+
+Signed-off-by: Andreas Vögele <[email protected]>
+---
+ lxc.c | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+diff --git a/lxc.c b/lxc.c
+index b515acd..3039cfc 100644
+--- a/lxc.c
++++ b/lxc.c
+@@ -198,7 +198,11 @@ static int lxc_attach_python_exec(void* _payload)
+ * container. As lxc_attach() calls fork() PyOS_AfterFork should be called
+ * in the new process if the Python interpreter will continue to be used.
+ */
++#if PY_VERSION_HEX >= 0x030700F0
++ PyOS_AfterFork_Child();
++#else
+ PyOS_AfterFork();
++#endif
+
+ struct lxc_attach_python_payload *payload =
+ (struct lxc_attach_python_payload *)_payload;
+@@ -748,8 +752,14 @@ Container_attach_and_possibly_wait(Container *self, PyObject *args,
+ if (!options)
+ return NULL;
+
++#if PY_VERSION_HEX >= 0x030700F0
++ PyOS_BeforeFork();
++#endif
+ ret = self->container->attach(self->container, lxc_attach_python_exec,
+ &payload, options, &pid);
++#if PY_VERSION_HEX >= 0x030700F0
++ PyOS_AfterFork_Parent();
++#endif
+ if (ret < 0)
+ goto out;
+
diff -Nru python3-lxc-5.0.0/debian/patches/series python3-lxc-5.0.0/debian/patches/series
--- python3-lxc-5.0.0/debian/patches/series 1970-01-01 00:00:00.000000000 +0000
+++ python3-lxc-5.0.0/debian/patches/series 2026-05-06 19:13:13.000000000 +0000
@@ -0,0 +1 @@
+001-cherry-pick-python-313-fix.patch
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Description: This is a digitally signed message part
--- End Message ---
--- Begin Message ---
Package: release.debian.org
Version: 13.5
This update has been released as part of Debian 13.5.
--- End Message ---
