The following snippet of code compiles on icc 2021.10.0
struct A{
virtual ~A() {};
virtual void foo() = 0;
};
struct B : public A
{
virtual void foo() {};
};
//
int main(){
A* x= new B;
auto y = *x;
y.foo();
return 0;
}
but fails at run time with the message
pure virtual method called
terminate called without an active exception
which can be cryptic to read. Note that gcc and other compilers report an error at compile time that A is an abstract class. The only way to force an error at compile time in icc is to delete the copy constructor of A.
OTOH, icx reports an error at compile time.
