Struct names can't be pattern matched with module prefixes

[brson]

mod codemap {
    struct Loc {
        name: ~str
    }
}

fn main() {
    let sp: codemap::Loc = codemap::Loc {
        name: ~"foo"
    };

    match sp {
        codemap::Loc { name } => {
            assert name == ~"foo"
        }
    }
}

/home/brian/dev/rust2/src/test/run-pass/expn_info.rs:13:21: 13:22 error: expected `=>` but found `{`
/home/brian/dev/rust2/src/test/run-pass/expn_info.rs:13         codemap::Loc { name } => {

[erickt]

Not sure it match destructuring is using the same codepath as let destructuring, so this may or may not be a dup of #3766.

[brson]

Probably the same