rustc panic with struct-like enum destructuring

[norfenstein]

rustc panics destructuring a struct-like enum variant in the following code (using this library: https://github.com/netvl/xml-rs):

extern crate xml;

use xml::reader::events::XmlEvent;

fn main() {
    let e = XmlEvent::ProcessingInstruction { name: "Test".to_string(), data: None };
    match e {
        XmlEvent::ProcessingInstruction { name, data } => {
            println!("name: {}, data: {}", name, data);
        },
        _ => {}
    }
}

the following, however, does not panic for some reason:

extern crate xml;

use xml::reader::events::XmlEvent;

fn main() {
    match (XmlEvent::ProcessingInstruction { name: "Test".to_string(), data: None }) {
        XmlEvent::ProcessingInstruction { name, data } => {
            println!("name: {}, data: {}", name, data);
        },
        _ => {}
    }
}

task 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', /home/rustbuild/src/rust-buildbot/slave/nightly-linux/build/src/libcore/option.rs:358

stack backtrace:
   1:     0x7fa54ecbbe50 - rt::backtrace::imp::write::hf87c140cfcd95fbaBly
   2:     0x7fa54ecbf0a0 - failure::on_fail::h343c4b97464b676eZNy
   3:     0x7fa54e911fa0 - unwind::begin_unwind_inner::hb4b9831d2f5e86936Qc
   4:     0x7fa54e911bd0 - unwind::begin_unwind_fmt::h5c8826b0094c4275hOc
   5:     0x7fa54e911b90 - rust_begin_unwind
   6:     0x7fa54e95a4a0 - panicking::panic_fmt::h55316e4e118a4d4bcxl
   7:     0x7fa54e9581a0 - panicking::panic::h0e0d0e8df2dbf5d1eul
   8:     0x7fa54cf64950 - middle::borrowck::move_data::fragments::add_fragment_siblings::hf1c2017286e03984bYg
   9:     0x7fa54cf61970 - middle::borrowck::move_data::fragments::fixup_fragment_sets::h5d485254dfae5a72cFg
  10:     0x7fa54cf6bb30 - middle::borrowck::move_data::FlowedMoveData<'a, 'tcx>::new::h992ddcd9e1966007F9h
  11:     0x7fa54cf76a60 - middle::borrowck::build_borrowck_dataflow_data::ha030304e52c4fd74Pui
  12:     0x7fa54cf73ae0 - middle::borrowck::borrowck_fn::h5c20904efff1f8a4Nri
  13:     0x7fa54cf75b80 - visit::walk_item::h10222699424413289430
  14:     0x7fa54cf748e0 - visit::walk_mod::h7223407092731541154
  15:     0x7fa54cf742e0 - middle::borrowck::check_crate::haaa04dfbd8f4f7fbjki
  16:     0x7fa54f1309e0 - util::common::time::h6027610953602738173
  17:     0x7fa54f0f1300 - driver::phase_3_run_analysis_passes::h63031984c677effauta
  18:     0x7fa54f0e0100 - driver::compile_input::h022976239e8f5a3cpba
  19:     0x7fa54f17cd80 - run_compiler::h2b243518ea560709z4b
  20:     0x7fa54f17cc70 - run::closure.21242
  21:     0x7fa54f18e670 - task::TaskBuilder::try_future::closure.22690
  22:     0x7fa54ec94410 - task::TaskBuilder::spawn_internal::closure.31179
  23:     0x7fa54e90fd70 - task::Task::spawn::closure.5765
  24:     0x7fa54e96d280 - rust_try_inner
  25:     0x7fa54e96d270 - rust_try
  26:     0x7fa54e90fe50 - unwind::try::ha36bc8815a761f13pFc
  27:     0x7fa54e90fc10 - task::Task::run::h24525a73fb4c9bb3fOb
  28:     0x7fa54e90f800 - task::Task::spawn::closure.5741
  29:     0x7fa54e911250 - thread::thread_start::ha943fdda31374bc3i6b
  30:     0x7fa5498110c0 - start_thread
  31:     0x7fa54e5d5ec9 - __clone
  32:                0x0 - <unknown>

rustc 0.13.0-nightly (8bca470 2014-12-08 00:12:30 +0000)
binary: rustc
commit-hash: 8bca470
commit-date: 2014-12-08 00:12:30 +0000
host: x86_64-unknown-linux-gnu
release: 0.13.0-nightly

Ubuntu 14.04.1

[norfenstein]

I'm now confident this is a duplicate of #19340.