Qtodotxt+PyQt5在Fedora40/41中核心转储问题排查

在Fedora 40和41的多台设备上，执行test.sh脚本会触发核心转储。相关脚本、依赖及执行输出如下：

test.sh脚本（注意会删除./tmp目录及pip缓存） #

cat /etc/os-release
python --version
which python
md5sum $(which python) 

rm -rf ./tmp
mkdir -p ./tmp
cd ./tmp
mkdir -p venv
python -m venv venv
. ./venv/bin/activate
pip cache purge
pip install -r ../piplibraries.txt
qtodotxt

piplibraries.txt内容 #

PyQt5==5.15.11
PyQt5-Qt5==5.15.15
PyQt5_sip==12.15.0
python-dateutil==2.9.0.post0
qtodotxt==1.9.0
six==1.16.0

Fedora 41执行输出 #

stdout #

NAME="Fedora Linux"
VERSION="41 (Workstation Edition)"
RELEASE_TYPE=stable
ID=fedora
VERSION_ID=41
VERSION_CODENAME=""
PLATFORM_ID="platform:f41"
PRETTY_NAME="Fedora Linux 41 (Workstation Edition)"
ANSI_COLOR="0;38;2;60;110;180"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora:41"
DEFAULT_HOSTNAME="fedora"
HOME_URL="https://fedoraproject.org/"
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f41/system-administrators-guide/"
SUPPORT_URL="https://ask.fedoraproject.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=41
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=41
SUPPORT_END=2025-12-15
VARIANT="Workstation Edition"
VARIANT_ID=workstation
Python 3.13.0
/usr/bin/python
b754f86375e105b86bb4392d88580ae1  /usr/bin/python
Files removed: 46
Collecting PyQt5==5.15.11 (from -r ../piplibraries.txt (line 1))
  Downloading PyQt5-5.15.11-cp38-abi3-manylinux_2_17_x86_64.whl.metadata (2.1 kB)
Collecting PyQt5-Qt5==5.15.15 (from -r ../piplibraries.txt (line 2))
  Downloading PyQt5_Qt5-5.15.15-py3-none-manylinux2014_x86_64.whl.metadata (536 bytes)
Collecting PyQt5_sip==12.15.0 (from -r ../piplibraries.txt (line 3))
  Downloading PyQt5_sip-12.15.0.tar.gz (104 kB)
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'done'
  Preparing metadata (pyproject.toml): started
  Preparing metadata (pyproject.toml): finished with status 'done'
Collecting python-dateutil==2.9.0.post0 (from -r ../piplibraries.txt (line 4))
  Downloading python_dateutil-2.9.0.post0-py2.py3-none-any.whl.metadata (8.4 kB)
Collecting qtodotxt==1.9.0 (from -r ../piplibraries.txt (line 5))
  Downloading qtodotxt-1.9.0.tar.gz (278 kB)
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'done'
  Preparing metadata (pyproject.toml): started
  Preparing metadata (pyproject.toml): finished with status 'done'
Collecting six==1.16.0 (from -r ../piplibraries.txt (line 6))
  Downloading six-1.16.0-py2.py3-none-any.whl.metadata (1.8 kB)
Downloading PyQt5-5.15.11-cp38-abi3-manylinux_2_17_x86_64.whl (8.2 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 8.2/8.2 MB 2.0 MB/s eta 0:00:00
Downloading PyQt5_Qt5-5.15.15-py3-none-manylinux2014_x86_64.whl (59.8 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 59.8/59.8 MB 2.2 MB/s eta 0:00:00
Downloading python_dateutil-2.9.0.post0-py2.py3-none-any.whl (229 kB)
Downloading six-1.16.0-py2.py3-none-any.whl (11 kB)
Building wheels for collected packages: PyQt5_sip, qtodotxt
  Building wheel for PyQt5_sip (pyproject.toml): started
  Building wheel for PyQt5_sip (pyproject.toml): finished with status 'done'
  Created wheel for PyQt5_sip: filename=PyQt5_sip-12.15.0-cp313-cp313-linux_x86_64.whl size=83179 sha256=0a7fa349c5b7f375408571f6d161fcce222abd976d5124318089e7e26ee63596
  Stored in directory: /home/odmi/.cache/pip/wheels/5b/f2/f6/93f2f74948dd23880023d3700802befd25cc8228408e85510a
  Building wheel for qtodotxt (pyproject.toml): started
  Building wheel for qtodotxt (pyproject.toml): finished with status 'done'
  Created wheel for qtodotxt: filename=qtodotxt-1.9.0-py3-none-any.whl size=293510 sha256=63d5bc8a7d2a36ea0c60fbf14ae5f06347ad794a866dd7fd7c598067afea5c15
  Stored in directory: /home/odmi/.cache/pip/wheels/a4/49/eb/2c2d44093981564419bd54a992860ba93260007ae762433b45
Successfully built PyQt5_sip qtodotxt
Installing collected packages: qtodotxt, PyQt5-Qt5, six, PyQt5_sip, python-dateutil, PyQt5
Successfully installed PyQt5-5.15.11 PyQt5-Qt5-5.15.15 PyQt5_sip-12.15.0 python-dateutil-2.9.0.post0 qtodotxt-1.9.0 six-1.16.0

stderr #

[notice] A new release of pip is available: 24.2 -> 24.3.1
[notice] To update, run: pip install --upgrade pip
Traceback (most recent call last):
  File "/home/odmi/projects/dev/testpyqt5/tmp/venv/lib64/python3.13/site-packages/qtodotxt/ui/views/tasks_search_view.py", line 41, in resizeEvent
    self.clearButton.move(self.rect().right() - frameWidth - sz.width(),
    ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                          (self.rect().bottom() + 1 - sz.height()) / 2)
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: arguments did not match any overloaded call:
  move(self, a0: QPoint): argument 1 has unexpected type 'int'
  move(self, ax: int, ay: int): argument 2 has unexpected type 'float'
test.sh: line 15: 137507 Aborted                 (core dumped) qtodotxt

复现方式 #

使用toolbox容器复现：

toolbox create testqtodotxt --release=f40
toolbox run --container testqtodotxt sudo dnf install -y $(cat ${PWD}/systemlibraries.txt)
toolbox run --container testqtodotxt sh ${PWD}/test.sh

systemlibraries.txt内容：

libglvnd-glx
tk-devel
xcb-util-wm
xcb-util-image
xcb-util-keysyms
xcb-util-renderutil
libxkbcommon-x11

尝试过替换tk-devel为python3-qt5-devel、移除tk-devel（出现Qt平台插件加载错误）、安装python3-pyside6，问题均未解决。补充：stderr显示核心转储，但未找到核心转储文件。

1. Python 3.13除法行为变化：Python 3.13中，整数除法/返回float类型，而qtodotxt 1.9.0的代码直接将该结果传给QWidget.move()方法。move()要求第二个参数是整数，浮点数参数触发TypeError。
2. 未捕获异常导致崩溃：Qt应用中未捕获的Python异常会直接终止程序并触发核心转储，这就是出现Aborted (core dumped)的原因。
3. 核心转储文件缺失：Fedora默认可能关闭了核心转储功能，或转储文件被限制在/var/lib/systemd/coredump/等特定目录，需检查ulimit -c设置或systemd的coredump配置。

方法一：修复qtodotxt代码中的除法问题 #

找到虚拟环境中qtodotxt/ui/views/tasks_search_view.py文件的第41行，将除法改为整数除法//：

self.clearButton.move(
    self.rect().right() - frameWidth - sz.width(),
    (self.rect().bottom() + 1 - sz.height()) // 2
)

修改后保存，重新运行qtodotxt即可。

方法二：使用兼容Python 3.13的qtodotxt版本 #

检查qtodotxt是否有更新版本，新版本通常会修复Python版本兼容性问题。修改piplibraries.txt中的版本号为最新兼容版，例如：

qtodotxt==1.10.0  # 假设该版本已修复问题

重新执行脚本安装即可。

方法三：切换到Python 3.12版本 #

在Fedora中安装Python 3.12，并用它创建虚拟环境：

sudo dnf install python3.12
python3.12 -m venv venv
. ./venv/bin/activate

再执行后续的pip安装和qtodotxt启动命令。Python 3.12及更早版本中，整数间的/运算在结果为整数时会返回整数，不会触发该错误。

关于核心转储文件 #

若需要查看核心转储文件：

1. 临时开启核心转储：执行ulimit -c unlimited，重新运行脚本后，转储文件会生成在当前目录。
2. 查看systemd管理的转储：用coredumpctl list列出所有转储，coredumpctl info <pid>查看详细信息。

内容的提问来源于stack exchange，提问作者Olivier