assigning/initializing pointer to member of struct accessed through mutable pointer triggers assertion

[michael-kenzel]

the following code will reproduce the issue:

struct Req {}

struct X {
    req: Req
}

fn test(x: &mut X) {
    let mut p = x;
    let r = &mut p.req;
}

triggers

artic/src/emit.cpp:776: void artic::Emitter::bind(const artic::ast::IdPtrn&, const thorin::Def*): Assertion `id_ptrn.type->convert(*this) == value->type()' failed.

[madmann91]

Fixed in commit #6edefe9