Segmentation fault when loading [std_msgs/Empty]

[siferati]

Problem description

Segmentation fault when loading bagfiles:

Stack trace (most recent call last):
#31   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.6", at 0x7fd2c73923ff, in 
#30   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.6", at 0x7fd2c739217c, in g_main_context_dispatch
#29   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5.15.7", at 0x7fd2c4609e5d, in 
#28   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5.15.7", at 0x7fd2c8b176db, in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>)
#27   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5.15.7", at 0x7fd2c8b40e84, in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)
#26   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5.15.7", at 0x7fd2c8b3f7df, in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*)
#25   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Core.so.5.15.7", at 0x7fd2c871a0a9, in QCoreApplication::notifyInternal2(QObject*, QEvent*)
#24   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c92adc67, in QApplication::notify(QObject*, QEvent*)
#23   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c92a4e52, in QApplicationPrivate::notify_helper(QObject*, QEvent*)
#22   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c93062d3, in 
#21   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c9302fb3, in 
#20   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c92ad156, in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool)
#19   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Core.so.5.15.7", at 0x7fd2c871a0a9, in QCoreApplication::notifyInternal2(QObject*, QEvent*)
#18   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c92ade56, in QApplication::notify(QObject*, QEvent*)
#17   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c92a4e52, in QApplicationPrivate::notify_helper(QObject*, QEvent*)
#16   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c9445dc2, in QPushButton::event(QEvent*)
#15   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c92e7dc5, in QWidget::event(QEvent*)
#14   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c939ef24, in QAbstractButton::mouseReleaseEvent(QMouseEvent*)
#13   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c939ed62, in 
#12   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c939d88d, in 
#11   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.15.7", at 0x7fd2c939d615, in QAbstractButton::clicked(bool)
#10   Object "/snap/plotjuggler-ros/11/kf5/usr/lib/x86_64-linux-gnu/libQt5Core.so.5.15.7", at 0x7fd2c875137b, in 
#9    Object "/snap/plotjuggler-ros/11/usr/local/bin/plotjuggler", at 0x56397a679749, in MainWindow::qt_metacall(QMetaObject::Call, int, void**)
#8    Object "/snap/plotjuggler-ros/11/usr/local/bin/plotjuggler", at 0x56397a6774b8, in MainWindow::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)
#7    Source "/usr/include/c++/9/bits/stl_vector.h", line 1756, in MainWindow::on_pushButtonLoadDatafile_clicked() [0x56397a6d2455]
#6    Source "/usr/include/c++/9/bits/stl_vector.h", line 1756, in MainWindow::loadDataFromFiles(QStringList) [0x56397a6cd435]
#5    Source "/usr/include/c++/9/bits/stl_vector.h", line 1756, in MainWindow::loadDataFromFile[abi:cxx11](PJ::FileLoadInfo const&) [0x56397a6c308e]
#4    Source "/root/parts/plotjuggler-ros/src/plotjuggler-ros-plugins/src/DataLoadROS/dataload_ros.cpp", line 123, in readDataFromFile [0x7fd2c01ab270]
#3  | Source "/root/parts/plotjuggler-ros/src/plotjuggler-ros-plugins/src/DataLoadROS/dataload_ros.cpp", line 64, in CreateParserROS
      Source "/root/parts/plotjuggler-ros/src/plotjuggler-ros-plugins/src/ros_parsers/ros1_parser.h", line 13, in getAllTopics [0x7fd2c01aaeb8]
#2    Object "/snap/plotjuggler-ros/11/usr/local/bin/libParserROS1.so", at 0x7fd2a1d4e736, in ParserFactoryROS1::createParser(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, PJ::PlotDataMapRef&)
#1    Object "/snap/plotjuggler-ros/11/usr/local/bin/libParserROS1.so", at 0x7fd2a1d506aa, in ParserROS::ParserROS(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, RosMsgParser::Deserializer*, PJ::PlotDataMapRef&)
#0    Object "/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.28", at 0x7fd2c837d6c4, in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::compare(char const*) const
Segmentation fault (Address not mapped to object [0x30])
/snap/plotjuggler-ros/11/usr/bin/launcher-plotjuggler-ros: line 15: 49536 Segmentation fault      (core dumped) ${SNAP}/usr/local/bin/plotjuggler --plugin_folders $PLUGIN_FOLDERS $@

Answer these questions (or I will ignore your issue)

Describe your platform / Operative System and the version of PlotJuggler you are using.

PlotJuggler-3 3.8.8 on ubuntu 20 with ros noetic.
PlotJuggler was installed via snap

Compile and try the latest version in the main branch and check if the problem persists.

Yes still have segmentation fault even when compiling manually

Check if the problem can be reproduced using the dummy data created by the command line argument "-t" or one of the files in the folder "datasamples".

No, the issue doesn't happen with bagfiles in samples folder

If it can't be reproduced with the dummy data, please share the CSV file or the rosbag that can be used to reproduce the problem.

Seems like the issue is related with the number of topics in the bagfile? Or maybe amount of data? If I keep removing topics from this bagfile eventually it loads correctly.

bagfile.zip

[facontidavide]

Thanks.I will investigate

[facontidavide]

Problem found. It crashes when it finds a message with type std_msgs/Empty. Pushing a solution and releasing 3.8.9

[siferati]

Thanks, I compiled locally and it solved the issue!

However, I have a different issue now that seems related -- only happens with std_msgs/Empty topic:

I'm uploading 2 bagfiles below. Both of them contain only std_msgs/Empty topic, but one of them loads correctly and the other one gives the above error.

• bad.zip
• good.zip

[facontidavide]

The empty message is definitely a corner case I did not consider. Also... Being empty, you will not be able to see it in plotjuggler