https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96919
--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Libin Dang from comment #6)
> (In reply to Martin Liška from comment #2)
> > Using latest GCC release you can see what happens:
> >
> > $ g++ pr96919.cc --coverage && ./a.out && gcov a-pr96919.cc -t
> > hello
> > libgcov profiling
> > error:/home/marxin/Programming/testcases/a-pr96919.gcda:overwriting an
> > existing profile data with a different timestamp
> > -: 0:Source:pr96919.cc
> > -: 0:Graph:a-pr96919.gcno
> > -: 0:Data:a-pr96919.gcda
> > -: 0:Runs:1
> > -: 1:class Base {
> > -: 2:public:
> > -: 3: Base() = default;
> > 1*: 4: virtual ~Base() = default;
> > ------------------
> > _ZN4BaseD0Ev:
> > #####: 4: virtual ~Base() = default;
> > ------------------
> > _ZN4BaseD2Ev:
> > 1: 4: virtual ~Base() = default;
> > ------------------
> > -: 5: virtual void foo() = 0;
> > -: 6:};
> > -: 7:class Hello : public Base {
> > -: 8:public:
> > -: 9: Hello() = default;
> > 1*: 10: ~Hello() = default;
> > ------------------
> > _ZN5HelloD0Ev:
> > #####: 10: ~Hello() = default;
> > ------------------
> > _ZN5HelloD2Ev:
> > 1: 10: ~Hello() = default;
> > ------------------
> > -: 11: void foo() override;
> > -: 12:};
> > -: 13:
> > -: 14:#include <iostream>
> > -: 15:
> > -: 16:using namespace std;
> > -: 17:
> > 1: 18:void Hello::foo() {
> > 1: 19: cout << "hello" << endl;
> > 1: 20:}
> > -: 21:
> > 1: 22:int main(int argc, char* argv[]) {
> > #####: 23: Hello hello;
> > 1: 24: hello.foo();
> > 1: 25: return 0;
> > -: 26:}
> >
> > So yes, it's a virtual destructor _ZN4BaseD0Ev that is not called.
> > And the not executed line:
> > #####: 4: Hello hello;
> >
> > corresponds to a basic block
> >
> > <bb 5> :
> > <L3>:
> > Hello::~Hello (&hello);
> > resx 2
> >
> > which would be executed when the Hellow constructor fails.
>
> A strange thing about this test case:
>
> If I removed 'return 0;' at line 25, gcov will mark line 23 as executed.
>
>
> Tested with both gcov 8.3 and 10.2.
I can confirm that.
