Its hard to find problem in template

[Paolo Biagini]

template<class T>
class TestClass
{
public:
  TestClass<T>()
  {
     memset( &m_hi , 1 , sizeof(m_hi));
  }

  T m_hi;
};

struct v {  virtual ~v() {} };
struct f {  float f=0.0f; };
struct z {  std::auto_ptr<v> av; };

int main()
{
   TestClass<std::string> objTest1;
   TestClass<v>  objTest2;
   TestClass<std::auto_ptr<v>> objTest3;
   TestClass<z> objTest4;
   TestClass<f> objTest5;
   TestClass<int> objTestOK;
}

[test.cpp:7]: (error) Using 'memset' on struct that contains a virtual method is unsafe, because constructor, destructor and copy operator calls are omitted. These are necessary for this non-POD type to ensure that a valid object is created.

I have no error for each template, and no information for find the wrong template used :-(

[Robert Reif]

Cppcheck is unable to instaniate the third variable:

[forum.cpp:21]: (debug) Failed to instantiate template "TestClass". The checking continues anyway.

and gives up so all templates after it are also not instantiated.

[Robert Reif]

I created a ticket for this: https://trac.cppcheck.net/ticket/8576#ticket