QWebEngine crash in Windows

rtfa

We load our login page using QtWebEngine in PyQt5. We create the exe using cx_freeze and when we try to run our exe, our app crashes and fails to start. We found the following trace in qt debug log

[1126/190232:ERROR:icu_util.cc(178)] Invalid file descriptor to ICU data received.
[1126/190232:FATAL:icu_util.cc(297)] Check failed: result. 
Backtrace:
	QtWebEngineCore::BrowserContextAdapter::customUrlSchemeHandlers [0x03542AA7+430215]
	QtWebEngineCore::BrowserContextAdapter::customUrlSchemeHandlers [0x03506257+182327]
	QWebEngineUrlRequestInfo::d_func [0x0448FD9D+2072781]
	QtWebEngineCore::UserScript::validUserScriptSchemes [0x0412F028+4075320]
	QtWebEngineCore::WebContentsAdapter::webContents [0x0331D2F6+14294]
	QtWebEngineCore::WebContentsAdapter::webContents [0x0331D585+14949]
	QtWebEngineCore::WebContentsAdapter::WebContentsAdapter [0x033153BA+106]
	QWebEngineHistoryItem::url [0x0674302B+1147]
	PyCFunction_FastCallKeywords [0x1DBE4F1E+62]
	PyEval_GetFuncDesc [0x1DC4AFF7+311]
	PyEval_EvalFrameDefault [0x1DC468F0+2816]
	PyEval_EvalFrameDefault [0x1DC4A195+17317]
	PyFunction_FastCallDict [0x1DC4B406+470]
	PyObject_FastCallDict [0x1DBA8681+97]
	PyObject_Call_Prepend [0x1DBA87D9+137]
	PyMethod_New [0x1DBBA85D+1517]
	PyObject_Call [0x1DBA858D+109]
	PyType_Ready [0x1DC00CAA+14106]
	PyType_Modified [0x1DBF795E+3838]
	PyObject_FastCallDict [0x1DBA86E7+199]
	PyObject_FastCallKeywords [0x1DBA8AB0+128]
	PyEval_GetFuncDesc [0x1DC4B063+419]
	PyEval_EvalFrameDefault [0x1DC484B9+9929]
	PyEval_EvalFrameDefault [0x1DC4A195+17317]
	PyFunction_FastCallDict [0x1DC4B406+470]
	PyObject_FastCallDict [0x1DBA8681+97]
	PyObject_Call_Prepend [0x1DBA87D9+137]
	PyMethod_New [0x1DBBA85D+1517]
	PyObject_Call [0x1DBA858D+109]
	PyType_Ready [0x1DC00CAA+14106]
	PyType_Modified [0x1DBF795E+3838]
	PyObject_FastCallDict [0x1DBA86E7+199]
	PyObject_FastCallKeywords [0x1DBA8AB0+128]
	PyEval_GetFuncDesc [0x1DC4B063+419]
	PyEval_EvalFrameDefault [0x1DC484B9+9929]
	PyEval_EvalFrameDefault [0x1DC4A195+17317]
	PyEval_GetFuncDesc [0x1DC4B204+836]
	PyEval_GetFuncDesc [0x1DC4B057+407]
	PyEval_EvalFrameDefault [0x1DC468F0+2816]
	PyEval_EvalFrameDefault [0x1DC4A195+17317]
	PyFunction_FastCallDict [0x1DC4B406+470]
	PyObject_FastCallDict [0x1DBA8681+97]
	PyObject_Call_Prepend [0x1DBA87D9+137]
	PyMethod_New [0x1DBBA85D+1517]
	PyObject_Call [0x1DBA858D+109]
	PyType_Ready [0x1DC00CAA+14106]
	PyType_Modified [0x1DBF795E+3838]
	PyObject_FastCallDict [0x1DBA86E7+199]
	PyObject_FastCallKeywords [0x1DBA8AB0+128]
	PyEval_GetFuncDesc [0x1DC4B063+419]
	PyEval_EvalFrameDefault [0x1DC468F0+2816]
	PyEval_GetFuncDesc [0x1DC4B10A+586]
	PyEval_GetFuncDesc [0x1DC4B181+705]
	PyEval_GetFuncDesc [0x1DC4B057+407]
	PyEval_EvalFrameDefault [0x1DC468F0+2816]
	PyEval_EvalFrameDefault [0x1DC4A195+17317]
	PyEval_GetFuncDesc [0x1DC4B204+836]
	PyEval_GetFuncDesc [0x1DC4B057+407]
	PyEval_EvalFrameDefault [0x1DC468F0+2816]
	PyEval_EvalFrameDefault [0x1DC4A195+17317]
	PyEval_EvalCode [0x1DC45D99+41]
	PyAST_FromNode [0x1DC42AB6+32182]

Note: We provide qt.conf file in the exe path with
[paths]
prefix= ./Qt in the exe path. Do we miss anything here? Your help is appreciated

kkoehne

This seems to be the same as https://bugreports.qt.io/browse/QTBUG-72228.