Crash: Could not find QtWebEngineProcess

[nise]

Orange version

3.13.0

Expected behavior

Open an new file or showing an example from the dialog.

Actual behavior

python3 -m Orange.canvas

Could not find QtWebEngineProcess
[5749:5749:0424/143557.294935:FATAL:zygote_host_impl_linux.cc(182)] Check failed: ReceiveFixedMessage(fds[0], kZygoteBootMessage, sizeof(kZygoteBootMessage), &boot_pid). 
#0 0x7f2c3c1580a5 <unknown>
#1 0x7f2c3c16deca <unknown>
#2 0x7f2c3b7b0fc3 <unknown>
#3 0x7f2c3b7afc3b <unknown>
#4 0x7f2c3b7b0219 <unknown>
#5 0x7f2c3b3f393a <unknown>
#6 0x7f2c3b3f8e76 <unknown>
#7 0x7f2c3af16600 <unknown>
#8 0x7f2c3af17b25 <unknown>
#9 0x7f2c3af06ee9 <unknown>
#10 0x7f2c3af070be QtWebEngineCore::WebContentsAdapter::WebContentsAdapter()
#11 0x7f2c40e58441 <unknown>
#12 0x7f2c40e58f24 QWebEnginePage::QWebEnginePage()
#13 0x7f2c40e66ebb QWebEngineView::page()
#14 0x7f2c4108d3f9 meth_QWebEngineView_page
#15 0x0000004e9b7f PyCFunction_Call
#16 0x0000005372f4 PyEval_EvalFrameEx
#17 0x0000005406df <unknown>
#18 0x00000053bd92 PyEval_EvalFrameEx
#19 0x0000005416ea PyEval_EvalCodeEx
#20 0x0000004ebe37 <unknown>
#21 0x0000005c1797 PyObject_Call
#22 0x00000053920b PyEval_EvalFrameEx
#23 0x0000005416ea PyEval_EvalCodeEx
#24 0x0000004ebe37 <unknown>
#25 0x0000005c1797 PyObject_Call
#26 0x0000004fb9ce <unknown>
#27 0x0000005c1797 PyObject_Call
#28 0x000000574999 <unknown>
#29 0x00000057f03c <unknown>
#30 0x0000005c1797 PyObject_Call
#31 0x00000053bba6 PyEval_EvalFrameEx
#32 0x0000005406df <unknown>
#33 0x00000053c1d0 PyEval_EvalFrameEx
#34 0x0000005416ea PyEval_EvalCodeEx
#35 0x0000004ebd23 <unknown>
#36 0x0000005c1797 PyObject_Call
#37 0x0000004fb9ce <unknown>
#38 0x0000005c1797 PyObject_Call
#39 0x000000574999 <unknown>
#40 0x00000057f03c <unknown>
#41 0x0000005c1797 PyObject_Call
#42 0x00000053bba6 PyEval_EvalFrameEx
#43 0x00000053b7e4 PyEval_EvalFrameEx
#44 0x00000053b7e4 PyEval_EvalFrameEx
#45 0x00000053b7e4 PyEval_EvalFrameEx
#46 0x00000053b7e4 PyEval_EvalFrameEx
#47 0x0000005416ea PyEval_EvalCodeEx
#48 0x0000004ebd23 <unknown>
#49 0x0000005c1797 PyObject_Call
#50 0x000000534d90 PyEval_CallObjectWithKeywords
#51 0x7f2c4a0dae15 PyQtSlot::call()
#52 0x7f2c4a0db320 PyQtSlot::invoke()
#53 0x7f2c4a0db59b PyQtSlotProxy::unislot()
#54 0x7f2c4a0dc377 PyQtSlotProxy::qt_metacall()
#55 0x7f2c49a59394 QMetaObject::activate()
#56 0x7f2c429c5582 QAction::triggered()
#57 0x7f2c429c7a80 QAction::activate()
#58 0x7f2c43380b98 sipQToolButton::nextCheckState()
#59 0x7f2c42abde10 <unknown>
#60 0x7f2c42abdf25 QAbstractButton::mouseReleaseEvent()
#61 0x7f2c42b8ecda QToolButton::mouseReleaseEvent()

Received signal 6
#0 0x7f2c3c1580a5 <unknown>
#1 0x7f2c3ae99141 <unknown>
#2 0x7f2c3c15843d <unknown>
#3 0x7f2c5be6c390 <unknown>
#4 0x7f2c5bac6428 gsignal
#5 0x7f2c5bac802a abort
#6 0x7f2c3c157dc5 <unknown>
#7 0x7f2c3c16e1ed <unknown>
#8 0x7f2c3b7b0fc3 <unknown>
#9 0x7f2c3b7afc3b <unknown>
#10 0x7f2c3b7b0219 <unknown>
#11 0x7f2c3b3f393a <unknown>
#12 0x7f2c3b3f8e76 <unknown>
#13 0x7f2c3af16600 <unknown>
#14 0x7f2c3af17b25 <unknown>
#15 0x7f2c3af06ee9 <unknown>
#16 0x7f2c3af070be QtWebEngineCore::WebContentsAdapter::WebContentsAdapter()
#17 0x7f2c40e58441 <unknown>
#18 0x7f2c40e58f24 QWebEnginePage::QWebEnginePage()
#19 0x7f2c40e66ebb QWebEngineView::page()
#20 0x7f2c4108d3f9 meth_QWebEngineView_page
#21 0x0000004e9b7f PyCFunction_Call
#22 0x0000005372f4 PyEval_EvalFrameEx
#23 0x0000005406df <unknown>
#24 0x00000053bd92 PyEval_EvalFrameEx
#25 0x0000005416ea PyEval_EvalCodeEx
#26 0x0000004ebe37 <unknown>
#27 0x0000005c1797 PyObject_Call
#28 0x00000053920b PyEval_EvalFrameEx
#29 0x0000005416ea PyEval_EvalCodeEx
#30 0x0000004ebe37 <unknown>
#31 0x0000005c1797 PyObject_Call
#32 0x0000004fb9ce <unknown>
#33 0x0000005c1797 PyObject_Call
#34 0x000000574999 <unknown>
#35 0x00000057f03c <unknown>
#36 0x0000005c1797 PyObject_Call
#37 0x00000053bba6 PyEval_EvalFrameEx
#38 0x0000005406df <unknown>
#39 0x00000053c1d0 PyEval_EvalFrameEx
#40 0x0000005416ea PyEval_EvalCodeEx
#41 0x0000004ebd23 <unknown>
#42 0x0000005c1797 PyObject_Call
#43 0x0000004fb9ce <unknown>
#44 0x0000005c1797 PyObject_Call
#45 0x000000574999 <unknown>
#46 0x00000057f03c <unknown>
#47 0x0000005c1797 PyObject_Call
#48 0x00000053bba6 PyEval_EvalFrameEx
#49 0x00000053b7e4 PyEval_EvalFrameEx
#50 0x00000053b7e4 PyEval_EvalFrameEx
#51 0x00000053b7e4 PyEval_EvalFrameEx
#52 0x00000053b7e4 PyEval_EvalFrameEx
#53 0x0000005416ea PyEval_EvalCodeEx
#54 0x0000004ebd23 <unknown>
#55 0x0000005c1797 PyObject_Call
#56 0x000000534d90 PyEval_CallObjectWithKeywords
#57 0x7f2c4a0dae15 PyQtSlot::call()
#58 0x7f2c4a0db320 PyQtSlot::invoke()
#59 0x7f2c4a0db59b PyQtSlotProxy::unislot()
#60 0x7f2c4a0dc377 PyQtSlotProxy::qt_metacall()
#61 0x7f2c49a59394 QMetaObject::activate()
  r8: ffff8001dce86ab8  r9: ffff8001dce86aa8 r10: 0000000000000008 r11: 0000000000000202
 r12: 00007ffe27334480 r13: 00000000000000aa r14: 00007ffe273346b0 r15: 00007ffe27334e20
  di: 0000000000001675  si: 0000000000001675  bp: 00007f2c4c89f140  bx: 00007ffe27334c00
  dx: 0000000000000006  ax: 0000000000000000  cx: 00007f2c5bac6428  sp: 00007ffe27334318
  ip: 00007f2c5bac6428 efl: 0000000000000202 cgf: 002b000000000033 erf: 0000000000000000
 trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000
[end of stack trace]
Calling _exit(1). Core file will not be generated.

Steps to reproduce the behavior

Additional info (worksheets, data, screenshots, ...)

During the pip install process some dependencies have not been checked. I do not know much about the mentioned python libraries, but they should be stated directly by their name.

[astaric]

Have you tried installing using miniconda? You can find the instructions on the webpage

If you have, could you paste the output of the

conda list

command?

[markotoplak]

There are some problems with pyqt5==5.10 on Linux (also some other software has problems with it). If you are on Linux, try instaling pyqt5==5.9.

[ales-erjavec]

As discovered at https://www.riverbankcomputing.com/pipermail/pyqt/2018-March/040080.html this is caused by QTBUG-66346 and affects Qt 5.10.1 and 5.9.4. You can downgrade PyQt5 to 5.10.0 or 5.9.2 (e.g. pip install PyQt5==5.9.2) or try running orange as orange-canvas --qt "--single-process"