Details
-
Bug
-
Resolution: Invalid
-
Not Evaluated
-
None
-
5.12.4
-
None
Description
The following example code:
#include <QSharedPointer> QPair<int, QSharedPointer<int>> foo() { return {42, nullptr}; } int main() { auto [x, p] = foo(); auto p2 = p; }
Produces the following warning in Clang's Analyzer:
QtCore.framework/Headers/qsharedpointer_impl.h:460:7: warning: 1st function call argument is an uninitialized value [clang-analyzer-core.CallAndMessage]
{ deref(d); }
^
test.cpp:9:12: note: Uninitialized value stored to '.second.d'
auto p2 = p;
^
test.cpp:10:1: note: Calling implicit destructor for 'QPair<int, QSharedPointer<int>>'
}
^
test.cpp:10:1: note: Calling '~QSharedPointer'
QtCore.framework/Headers/qsharedpointer_impl.h:315:25: note: Calling 'QSharedPointer::deref'
~QSharedPointer() { deref(); }
^
QtCore.framework/Headers/qsharedpointer_impl.h:460:7: note: 1st function call argument is an uninitialized value
{ deref(d); }
^
I'm not really sure what is going on here. Using const auto& in the structured binding or replacing QSharedPointer with std::shared_ptr fixes the warning though.