Fields generated from primary constructor parameters are incorrectly referenced by the Generate Equals and GetHashCode... codefix.

[SleepWellPupper]

Versions Used:
Compiler version: '4.12.0-3.24572.7 (dfa7fc6)'. Language version: preview.

Steps to Reproduce:

Applying the Generate Equals and GetHashCode... codefix to a type using primary ctor parameters captured in fields:

struct Foo(String a)
{
    public override String ToString() => a;
}

produces this dialog:

and this generated code:

struct Foo(String a) : IEquatable<Foo>
{
    public override Boolean Equals(Object? obj) => obj is Foo foo && Equals(foo);
    public Boolean Equals(Foo other) => <a>P == other.<a>P;
    public override Int32 GetHashCode() => HashCode.Combine(<a>P);
    public override String ToString() => a;

    public static Boolean operator ==(Foo left, Foo right) => left.Equals(right);
    public static Boolean operator !=(Foo left, Foo right) => !( left  ==  right );
}

Expected Behavior:

The dialog, as well as the generated code use the user-facing primary ctor parameter name a.

Actual Behavior:

The dialog, as well as the generated code use the generated field name <a>P.