https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109172
Bug ID: 109172
Summary: g++ calls a private destructor with the keyword throw
after the try-block
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: MikeSmith32564 at mail dot com
Target Milestone: ---
Created attachment 54692
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54692&action=edit
Bug example
In the attached example an instance of class Demo is constructed in-place in a
buffer by following the natural alignment of Demo and then this instance is
passed to throw.
Note that Demo has a private destructor. The expected behavior when building is
that g++ should return a compilation error because a private destructor cannot
be called
outisde of the class Demo or outside of friend declarations. The actual
behavior is that the example builds successfully when
g++ -std=c++11 ./main.cpp -o ./main
is used, producing the following output:
Demo(), id = 1
Demo(const Demo&) called, this->id = 2, other.id = 1
in catch, e.id = 2
~Demo(), id = 2
main ends here
If the destructor is instead declared as deleted the example fails to compile
as expected:
main.cpp: In function 'int main()':
main.cpp:69:10: error: use of deleted function 'Demo::~Demo()'
throw *d;
^
main.cpp:61:2: note: declared here
~Demo() = delete;
^
