This should compile:

struct range
{
    int *ptr;
    @property inout(int)* front() inout
    {
        return ptr;
    }

    @property bool empty() const
    {
        return ptr is null;
    }

    void popFront()
    {
        ptr = null;
    }
}

void main()
{
    int x = 5;
    auto r = range(&x);
    foreach(p; r) // line 24
    {
    }
}

bug.d(24): Error: variable bug.main.p inout variables can only be declared inside inout functions
bug.d(24): Error: cannot implicitly convert expression (__r1.front()) of type int* to inout(int)*

The range foreach rewrite somehow gets inout into the resulting type of r.front, where it should really be the resulting wild type (in this case int*)

Changing the foreach loop to:

foreach(int *p; r)
{
}

compiles.