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Details

Type: Bug
Resolution: Done
Priority: P3: Somewhat important
Fix Version/s: 5.15.3, 6.0.2, 6.1.0 Alpha, 6.1
Affects Version/s: 5.15.2
Component/s: QML: Declarative and Javascript Engine
Labels:
- qmlnext
Environment:
Linux Mint Ulyssa 20.1 x86_64
Clang 12
X11

Platform/s:

Linux/Wayland, Linux/X11
Commits:
40eaa9509b1c2e430b7617e1b42aa66214ad80df (qt/qtdeclarative/dev) 2a5b952a624abd2ea45192861f8f56479743aa8b (qt/qtdeclarative/6.0) 3dda59305053240d154cab3b35fbcbcc9cfa9042 (qt/qtdeclarative/6.1) 2426d3aec5 (qt/qtdeclarative/5.15)

Description

When compiled with clang, the module QmlPluginDump produces the following error:

qtdeclarative/tools/qmlplugindump/main.cpp:118:44: error: use of overloaded operator '==' is ambiguous (with operand types 'const QString' and 'QHashedString')
 || versionInfo.pluginImportUri == ty.module()
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~
/home/twdragon/src/qt5/build/qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qstring.h:806:31: note: candidate function
 friend Q_CORE_EXPORT bool operator==(const QString &s1, const QString &s2) noexcept;
 ^
../../include/QtQml/5.15.2/QtQml/private/../../../../../../../qtdeclarative/src/qml/qml/ftw/qhashedstring_p.h:212:21: note: candidate function (with reversed parameter order)
bool QHashedString::operator==(const QHashedString &string) const
 ^
../../include/QtQml/5.15.2/QtQml/private/../../../../../../../qtdeclarative/src/qml/qml/ftw/qhashedstring_p.h:218:21: note: candidate function (with reversed parameter order)

The workaround is to select the inherited type explicitly in file qtdeclarative/tools/qmlplugindump/main.cpp:

static bool matchingImportUri(const QQmlType &ty, const QmlVersionInfo& versionInfo) {
 if (versionInfo.strict) {
 return (versionInfo.pluginImportUri == static_cast<QString>(ty.module())
 && (ty.majorVersion() == versionInfo.majorVersion || ty.majorVersion() == -1))
 || ty.module().isEmpty();
 }
 return ty.module().isEmpty()
 || versionInfo.pluginImportUri == static_cast<QString>(ty.module())
 || ty.module().startsWith(versionInfo.pluginImportUri + QLatin1Char('.'));
}

instead of:

static bool matchingImportUri(const QQmlType &ty, const QmlVersionInfo& versionInfo) {
 if (versionInfo.strict)
{ return (versionInfo.pluginImportUri == ty.module() && (ty.majorVersion() == versionInfo.majorVersion || ty.majorVersion() == -1)) || ty.module().isEmpty(); }
return ty.module().isEmpty()

versionInfo.pluginImportUri == ty.module()   ty.module().startsWith(versionInfo.pluginImportUri + QLatin1Char('.'));
 }