Your message dated Sun, 11 Oct 2026 18:04:40 +0000
with message-id <[email protected]>
and subject line Bug#1147230: fixed in dm-tree 0.1.9-2
has caused the Debian Bug report #1147230,
regarding dm-tree: FTBFS against python 3.15rc2
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
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misconfiguration somewhere. Please contact [email protected]
immediately.)
--
1147230: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1147230
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: src:dm-tree
Version: 0.1.9-1
User: [email protected]
Usertags: python3.15
Tags: patch, ftbfs, forky, sid
Severity: important
Hi!
While rebuilding the python related packages against the Python 3.15rc2
version we found that dm-tree fails to build from source [1].
The error is:
pybind11::handle::dec_ref() is being called while the GIL is either not held or
invalid. Please see
https://pybind11.readthedocs.io/en/stable/advanced/misc.html#common-sources-of-global-interpreter-lock-errors
for debugging advice.
If you are convinced there is no bug in your code, you can #define
PYBIND11_NO_ASSERT_GIL_HELD_INCREF_DECREF to disable this check. In that case
you have to ensure this #define is consistently used for all translation units
linked into a given pybind11 extension, otherwise there will be ODR violations.
The failing pybind11::handle::dec_ref() call was triggered on a ABCMeta object.
terminate called after throwing an instance of 'std::runtime_error'
what(): pybind11::handle::dec_ref() PyGILState_Check() failure.
Aborted
E: pybuild pybuild:485: test: plugin pyproject failed with: exit code=134:
cd /build/reproducible-path/dm-tree-0.1.9/.pybuild/cpython3_3.15_dm-tree/build;
python3.15 -m pytest
To fix the issues I had to apply two fixes:
- Backport c9be91f8 Add support for python 3.14 [2]. Which was already
included in version 0.1.10.
- Add patch to Release static Python objects to avoid dec_ref during
finalization. This is because in Python 3.15 this triggers the
PyGILState_Check() assertion.
I've applied these fixes in the sandbox [3] to verify that it builds
successfully, please consider applying the patch to support the upcoming
3.15 version.
Setting the severity to important for now. Once Python 3.15 is released,
it will be added to python3-defaults and this bug will become release
critical.
Happy hacking,
[1]: https://debusine.debian.net/debian/r-python-python3.15/artifact/4597612/
[2]:
https://github.com/google-deepmind/tree/commit/c9be91f8a9b84435da0d1e25b1d4bb4e249bc612
[3]: https://debusine.debian.net/debian/r-python-python3.15/
--
"Can you imagine what I would do if I could do all I can?" -- Sun Tzu
Saludos /\/\ /\ >< `/
From: Mathieu Scheltienne <[email protected]>
Date: Thu, 26 Mar 2026 20:29:20 +0100
Subject: Add support for python 3.14
Origin: upstream, https://github.com/google-deepmind/tree/commit/c9be91f8a9b84435da0d1e25b1d4bb4e249bc612
---
tree/tree.cc | 26 +++++++++++++++-----------
1 file changed, 15 insertions(+), 11 deletions(-)
--- a/tree/tree.cc
+++ b/tree/tree.cc
@@ -15,12 +15,13 @@
#include "tree.h"
#include <functional>
+#include <atomic>
#include <memory>
+#include <mutex>
#include <string>
#include <unordered_map>
// logging
-#include "absl/memory/memory.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include <pybind11/pybind11.h>
@@ -50,7 +51,7 @@
const int kMaxItemsInCache = 1024;
-bool WarnedThatSetIsNotSequence = false;
+std::atomic<bool> WarnedThatSetIsNotSequence{false};
bool IsString(PyObject* o) {
return PyBytes_Check(o) || PyByteArray_Check(o) || PyUnicode_Check(o);
@@ -114,6 +115,7 @@
auto* type = Py_TYPE(o);
{
+ std::lock_guard<std::mutex> lock(mutex_);
auto it = type_to_sequence_map_.find(type);
if (it != type_to_sequence_map_.end()) {
return it->second;
@@ -133,6 +135,7 @@
// that are eligible for decref. As a precaution, we limit the size of the
// map to 1024.
{
+ std::lock_guard<std::mutex> lock(mutex_);
if (type_to_sequence_map_.size() < kMaxItemsInCache) {
Py_INCREF(type);
type_to_sequence_map_.insert({type, check_result});
@@ -145,29 +148,30 @@
private:
std::function<int(PyObject*)> ternary_predicate_;
std::unordered_map<PyTypeObject*, bool> type_to_sequence_map_;
+ mutable std::mutex mutex_;
};
py::object GetCollectionsSequenceType() {
static py::object type =
- py::module::import("collections.abc").attr("Sequence");
+ py::module_::import("collections.abc").attr("Sequence");
return type;
}
py::object GetCollectionsMappingType() {
static py::object type =
- py::module::import("collections.abc").attr("Mapping");
+ py::module_::import("collections.abc").attr("Mapping");
return type;
}
py::object GetCollectionsMappingViewType() {
static py::object type =
- py::module::import("collections.abc").attr("MappingView");
+ py::module_::import("collections.abc").attr("MappingView");
return type;
}
py::object GetWraptObjectProxyTypeUncached() {
try {
- return py::module::import("wrapt").attr("ObjectProxy");
+ return py::module_::import("wrapt").attr("ObjectProxy");
} catch (const py::error_already_set& e) {
if (e.matches(PyExc_ImportError)) return py::none();
throw e;
@@ -722,13 +726,13 @@
ValueIteratorPtr GetValueIterator(PyObject* nested) {
if (PyDict_Check(nested)) {
- return absl::make_unique<DictValueIterator>(nested);
+ return std::make_unique<DictValueIterator>(nested);
} else if (IsMappingHelper(nested)) {
- return absl::make_unique<MappingValueIterator>(nested);
+ return std::make_unique<MappingValueIterator>(nested);
} else if (IsAttrsHelper(nested)) {
- return absl::make_unique<AttrsValueIterator>(nested);
+ return std::make_unique<AttrsValueIterator>(nested);
} else {
- return absl::make_unique<SequenceValueIterator>(nested);
+ return std::make_unique<SequenceValueIterator>(nested);
}
}
@@ -741,7 +745,7 @@
return py::reinterpret_steal<py::object>(ptr);
}
-PYBIND11_MODULE(_tree, m) {
+PYBIND11_MODULE(_tree, m, py::mod_gil_not_used()) {
// Resolve `wrapt.ObjectProxy` at import time to avoid doing
// imports during function calls.
tree::GetWraptObjectProxyType();
From: Maximiliano Curia <[email protected]>
Date: Tue, 8 Sep 2026 10:48:00 +0200
Subject: Release static Python objects to avoid dec_ref during finalization.
---
tree/tree.cc | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
Index: python-dm-tree/tree/tree.cc
===================================================================
--- python-dm-tree.orig/tree/tree.cc
+++ python-dm-tree/tree/tree.cc
@@ -151,21 +151,21 @@ class CachedTypeCheck {
mutable std::mutex mutex_;
};
-py::object GetCollectionsSequenceType() {
- static py::object type =
- py::module_::import("collections.abc").attr("Sequence");
+py::handle GetCollectionsSequenceType() {
+ static py::handle type =
+ py::object(py::module_::import("collections.abc").attr("Sequence")).release();
return type;
}
-py::object GetCollectionsMappingType() {
- static py::object type =
- py::module_::import("collections.abc").attr("Mapping");
+py::handle GetCollectionsMappingType() {
+ static py::handle type =
+ py::object(py::module_::import("collections.abc").attr("Mapping")).release();
return type;
}
-py::object GetCollectionsMappingViewType() {
- static py::object type =
- py::module_::import("collections.abc").attr("MappingView");
+py::handle GetCollectionsMappingViewType() {
+ static py::handle type =
+ py::object(py::module_::import("collections.abc").attr("MappingView")).release();
return type;
}
--- End Message ---
--- Begin Message ---
Source: dm-tree
Source-Version: 0.1.9-2
Done: Maximiliano Curia <[email protected]>
We believe that the bug you reported is fixed in the latest version of
dm-tree, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Maximiliano Curia <[email protected]> (supplier of updated dm-tree package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Tue, 08 Sep 2026 11:05:04 +0200
Source: dm-tree
Architecture: source
Version: 0.1.9-2
Distribution: unstable
Urgency: medium
Maintainer: Debian Python Team <[email protected]>
Changed-By: Maximiliano Curia <[email protected]>
Closes: 1147230
Changes:
dm-tree (0.1.9-2) unstable; urgency=medium
.
* Team upload.
.
[ Alexandre Detiste ]
* apply Multi-Arch: hint
* drop "Rules-Requires-Root: no": it is the default now
.
[ Maximiliano Curia ]
* Backport c9be91f8 Add support for python 3.14
* Add patch to Release static Python objects to avoid dec_ref during
finalization. (Closes: #1147230)
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