Details
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Type:
Bug
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Status: Closed
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Priority:
P1: Critical
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Resolution: Done
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Affects Version/s: 5.14.1
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Fix Version/s: 5.14.2
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Component/s: Network, Network: BearerManagement
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Labels:None
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Environment:macOS 10.15.1
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Platform/s:
macOS
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Commits:c9eb9411cf901c6a9af5d470ebb5ba7ba7b7583a
Description
We encountered a bug in 5.14. If bearermanagement is disabled for Qt on macOS (-no-feature-bearermanagement) the QNetworkAccessManager cannot send requests, producing the error "Network access is disabled.".
The bug occurs because the NetworkStatusMonitor, which was introduced in 5.14 (https://codereview.qt-project.org/c/qt/qtbase/+/255898/38), does not check for disabled bearermanagement. The NetworkStatusMonitor is always enabled and cannot be disabled using other means, as the check for an environment variable has been removed (https://github.com/qt/qtbase/commit/8ac77123e287b13063a68ba2d48e0cc5cb24616d). When manually patching QNetworkStatusMonitor::isEnabled() in qtbase/src/network/kernel/qnetconmonitor_darwin.mm to always return false instead of true, the NetworkAccessManager can process requests again.
This behavior can be tested with the "qtbase/examples/download" example and any web ressource.