Inheritance and pure virtual

[hendrixj]

We had a base class that had a member function that incorrectly returned a pointer instead of a const pointer.
While looking at this, I came across some behavior I didn't expect. The following code snippets illustrate.
This code snippet fails to compile because Y is abstract:

#include <iostream>
using namespace std;

class X
{
public:
    virtual const char* getName() const=0;
};

class Y : public X
{
public:
    virtual char* getName() {
        static char name[] = "bob";
        return name;
    }
};

int main()
{
    Y y;
    cout << y.getName() << endl;
    return 0;
}

That makes sense to me: "virtual const char* getName() const" is never defined.

This fails to compile because of conflicting definition of the return type:

using namespace std;

class X
{
public:
    virtual const char* getName() const=0;
};

class Y : public X
{
public:
    virtual char* getName() const {
        static char name[] = "bob";
        return name;
    }
};

int main()
{
    Y y;
    cout << y.getName() << endl;
    return 0;
}

Why does the difference between the two (constness of the function) result in the two different errors?