--- Begin Message ---
- To: Debian Bug Tracking System <submit@bugs.debian.org>
- Subject: python3-pyqt5: Segmentation fault when switching between image and text with html tags using style sheets
- From: Danny Milosavljevic <danny.milo@gmail.com>
- Date: Tue, 27 Aug 2019 16:06:07 +0000
- Message-id: <156692196701.1028.16447630978294101092.reportbug@localhost>
Package: python3-pyqt5
Version: 5.11.3+dfsg-1+b3
Severity: important
Dear Maintainer,
there is a segmentation fault problem with python3-qt5 and/or qt5 when switching between image and text with html tags.
To reproduce,
(1) Use Debian 10 live iso (or any Debian 10; it happened on a finished installation as well)
(2) Invoke: sudo apt-get update
(3) Invoke: sudo apt-get install python3-pyqt5
(4) Invoke: cp /usr/share/icons/Adwaita/48x48/status/network-wired-disconnected.png .
(or any other png)
(5) Save the text below as "a.py"
(6) Invoke: QT_QPA_PLATFORM=offscreen python3 a.py 1
(7) Wait for 5 seconds
(8) See the segmentation fault
It's very very reproducible for me.
Text:
from PyQt5.QtWidgets import QWidget, QLabel, QApplication
from PyQt5.QtCore import QTimer, QVariant, pyqtSlot
style=\
"""QLabel {
qproperty-alignment: AlignCenter;
min-width: 84px;
min-height: 84px;
max-width: 84px;
max-height: 84px;
}
QLabel[state="image"]{
background-image: url(network-wired-disconnected.png);
background-repeat: no-repeat;
background-position: center;
background-color: #eeeeee;
qproperty-text: " ";
}
QLabel[state="text"]{
background-image: none;
background-repeat: no-repeat;
background-position: center;
background-color: #eeeeee;
qproperty-text: "This is<br>an<br>example";
}
"""
style2=\
"""QLabel {
qproperty-alignment: AlignCenter;
min-width: 84px;
min-height: 84px;
max-width: 84px;
max-height: 84px;
}
QLabel[state="image"]{
background-color: orange;
qproperty-text: "Image";
}
QLabel[state="text"]{
background-color: #eeeeee;
qproperty-text: "This is<br>an<br>example";
}
"""
# NO segfault!!
style3=\
"""QLabel {
qproperty-alignment: AlignCenter;
min-width: 84px;
min-height: 84px;
max-width: 84px;
max-height: 84px;
}
QLabel[state="image"]{
background-color: orange;
qproperty-text: "Image";
}
QLabel[state="text"]{
background-color: #eeeeee;
qproperty-text: "Text";
}
"""
style4=\
"""QLabel {
qproperty-alignment: AlignCenter;
border: 1px solid #cccccc;
border-bottom: 1px solid white;
background-color: #eeeeee;
padding: 2px;
font-size: 15px;
font-family: "free sans";
qproperty-alignment: AlignCenter;
min-width: 84px;
min-height: 84px;
max-width: 84px;
max-height: 84px;
}
QLabel[state="image"]{
background-color: orange;
qproperty-text: "Image";
}
QLabel[state="text"]{
background-color: #eeeeee;
qproperty-text: "<table><tr><td>This is a</td></tr><tr><td>Text</td></tr></table>";
}
"""
# NO segfault!!
style5=\
"""QLabel {
qproperty-alignment: AlignCenter;
min-width: 84px;
min-height: 84px;
max-width: 84px;
max-height: 84px;
}
QLabel[state="image"]{
background-image: url(network-wired-disconnected.png);
background-repeat: no-repeat;
background-position: center;
background-color: #eeeeee;
qproperty-text: " ";
}
QLabel[state="text"]{
background-image: none;
background-repeat: no-repeat;
background-position: center;
background-color: #eeeeee;
qproperty-text: "Text";
}
"""
# Program crashes with "segmentation fault" when
# html-tags are in the label text
# -----------------------------------
# -----------------------------------
class LabelDemoWidget(QWidget):
def __init__(self, style=style, parent=None):
QWidget.__init__(self, parent=parent)
self.style=style
self.topLabel=QLabel(self)
self.topLabel.setObjectName("topLabel")
self.label_prop="text"
self.switch={"text":"image","image":"text"}
self.setGeometry(100, 100, 100, 100)
flip=QTimer(self)
flip.setInterval(1000)
flip.timeout.connect(self.new_style)
flip.start()
# -----------------------------------
@pyqtSlot()
def new_style(self):
self.topLabel.setProperty("state",QVariant(self.switch[self.label_prop]))
self.label_prop=self.switch[self.label_prop]
self.setStyleSheet(self.style)
# -----------------------------------
if __name__=='__main__':
# usage python3 label_demo.py 0 ... 4
# 2 and 4 cause no segfault
# all others with html-tags in text will crash after some time with segfault
# debian buster (10) with python3 (3.7.3), python3-qt5 (5.11.3) out of the box
import sys
app=QApplication(sys.argv)
w = LabelDemoWidget([style, style2, style3, style4, style5][int(sys.argv[1])])
w.show()
sys.exit(app.exec_())
-- System Information:
Debian Release: 10.0
APT prefers stable
APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.19.0-5-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages python3-pyqt5 depends on:
ii libc6 2.28-10
ii libgcc1 1:8.3.0-6
ii libpython3.7 3.7.3-2
ii libqt5core5a [qtbase-abi-5-11-3] 5.11.3+dfsg1-1
ii libqt5dbus5 5.11.3+dfsg1-1
ii libqt5designer5 5.11.3-4
ii libqt5gui5 5.11.3+dfsg1-1
ii libqt5help5 5.11.3-4
ii libqt5network5 5.11.3+dfsg1-1
ii libqt5printsupport5 5.11.3+dfsg1-1
ii libqt5test5 5.11.3+dfsg1-1
ii libqt5widgets5 5.11.3+dfsg1-1
ii libqt5xml5 5.11.3+dfsg1-1
ii libstdc++6 8.3.0-6
ii python3 3.7.3-1
ii python3-sip [sip-py3api-12.5] 4.19.14+dfsg-2
python3-pyqt5 recommends no packages.
Versions of packages python3-pyqt5 suggests:
pn python3-pyqt5-dbg <none>
-- no debconf information
--- End Message ---
--- Begin Message ---
- To: 935909-close@bugs.debian.org
- Subject: Bug#935909: fixed in qtbase-opensource-src 5.11.3+dfsg1-1+deb10u2
- From: Dmitry Shachnev <mitya57@debian.org>
- Date: Sun, 08 Dec 2019 21:47:08 +0000
- Message-id: <E1ie4OS-0007nR-O1@fasolo.debian.org>
Source: qtbase-opensource-src
Source-Version: 5.11.3+dfsg1-1+deb10u2
We believe that the bug you reported is fixed in the latest version of
qtbase-opensource-src, 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 935909@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Dmitry Shachnev <mitya57@debian.org> (supplier of updated qtbase-opensource-src 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 ftpmaster@ftp-master.debian.org)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Sun, 24 Nov 2019 20:34:59 +0300
Source: qtbase-opensource-src
Binary: libqt5core5a libqt5gui5 qt5-gtk-platformtheme qt5-flatpak-platformtheme libqt5network5 libqt5opengl5 libqt5sql5 libqt5sql5-mysql libqt5sql5-odbc libqt5sql5-psql libqt5sql5-sqlite libqt5sql5-tds libqt5sql5-ibase libqt5xml5 libqt5dbus5 libqt5test5 libqt5concurrent5 libqt5widgets5 libqt5printsupport5 qtbase5-dev qtbase5-private-dev libqt5opengl5-dev qtbase5-dev-tools qt5-qmake-bin qt5-qmake qtbase5-examples qt5-default qtbase5-doc qtbase5-doc-html
Architecture: source
Version: 5.11.3+dfsg1-1+deb10u2
Distribution: buster
Urgency: medium
Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Changed-By: Dmitry Shachnev <mitya57@debian.org>
Description:
libqt5concurrent5 - Qt 5 concurrent module
libqt5core5a - Qt 5 core module
libqt5dbus5 - Qt 5 D-Bus module
libqt5gui5 - Qt 5 GUI module
libqt5network5 - Qt 5 network module
libqt5opengl5 - Qt 5 OpenGL module
libqt5opengl5-dev - Qt 5 OpenGL library development files
libqt5printsupport5 - Qt 5 print support module
libqt5sql5 - Qt 5 SQL module
libqt5sql5-ibase - Qt 5 Firebird database driver
libqt5sql5-mysql - Qt 5 MySQL database driver
libqt5sql5-odbc - Qt 5 ODBC database driver
libqt5sql5-psql - Qt 5 PostgreSQL database driver
libqt5sql5-sqlite - Qt 5 SQLite 3 database driver
libqt5sql5-tds - Qt 5 FreeTDS database driver
libqt5test5 - Qt 5 test module
libqt5widgets5 - Qt 5 widgets module
libqt5xml5 - Qt 5 XML module
qt5-default - Qt 5 development defaults package
qt5-flatpak-platformtheme - Qt 5 Flatpak platform theme
qt5-gtk-platformtheme - Qt 5 GTK+ 3 platform theme
qt5-qmake - Qt 5 qmake Makefile generator tool
qt5-qmake-bin - Qt 5 qmake Makefile generator tool — binary file
qtbase5-dev - Qt 5 base development files
qtbase5-dev-tools - Qt 5 base development programs
qtbase5-doc - Qt 5 base documentation
qtbase5-doc-html - Qt 5 base HTML documentation
qtbase5-examples - Qt 5 base examples
qtbase5-private-dev - Qt 5 base private development files
Closes: 911702 911844 935627 935909
Changes:
qtbase-opensource-src (5.11.3+dfsg1-1+deb10u2) buster; urgency=medium
.
[ Dmitry Shachnev ]
* Backport upstream patch to add support for non-PPD printers and avoid
silent fallback to a printer supporting PPD (closes: #911702, #911844).
* Backport upstream patch to fix crash in QStyleSheetStyle::repolish()
when using QLabels with rich text (closes: #935909).
.
[ Melvin Vermeeren ]
* Backport upstream patch to fix graphics tablet hover events (closes:
#935627).
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