/////////////////////////////// test.d ///////////////////////////////
void main()
{
    int[string] aa;
    aa["name"] = 5;

    int*[] pvalues;
    foreach (name, ref value; aa)
    {
        // Deprecation: copying `&value` into allocated memory escapes
        // a reference to parameter variable `value`
        pvalues ~= &value;
    }

    // The reference is, in fact, valid.
    *pvalues[0] = 7;
    assert(aa["name"] == 7);
}
//////////////////////////////////////////////////////////////////////

The error message, besides apparently being spurious, is additionally misleading: `value` is not a parameter as far as the programmer is concerned.

This is a regression caused by enabling DIP25 by default (https://github.com/dlang/dmd/pull/10805).