ICE when matching a dereferenced complex newtype against the newtype

[jdm]

This doesn't reproduce if the inner type is something like uint or a tuple.

struct S(Either<uint, uint>);

fn main() {
    match *S(Left(5)) {
      S(_) => {}
    }
}

#0  rust_task_fail (task=0x7ffff0108840, expr=0x7fffe84aaa00 "non-variant in variant_def_ids", file=0x7fffe8500020 "/run/media/jdm/ssd/rust/src/libsyntax/ast_util.rs", line=56)
    at /run/media/jdm/ssd/rust/src/rt/rust_task.cpp:86
#1  0x00007ffff54c7f89 in __morestack () from /usr/local/bin/../lib/librustrt.so
#2  0x00007ffff54b9310 in call_on_c_stack (fn_ptr=0x7ffff54b8c50, args=0x7fffe84c75d0, this=0x7ffff0108840) at /run/media/jdm/ssd/rust/src/rt/rust_task.h:478
#3  call_upcall_on_c_stack (fn_ptr=0x7ffff54b8c50, args=0x7fffe84c75d0, task=<optimized out>) at /run/media/jdm/ssd/rust/src/rt/rust_upcall.cpp:45
#4  upcall_fail (expr=0x7fffe84aaa00 "non-variant in variant_def_ids", file=0x7fffe8500020 "/run/media/jdm/ssd/rust/src/libsyntax/ast_util.rs", line=<optimized out>)
    at /run/media/jdm/ssd/rust/src/rt/rust_upcall.cpp:128
#5  0x00007ffff7df764b in sys::begin_unwind_::_15feb4cf285334c::_06 () from /usr/local/bin/../lib/libcore-c3ca5d77d81b46c1-0.6.so
#6  0x00007ffff7df75f2 in sys::begin_unwind::anon::anon::expr_fn_14907 () from /usr/local/bin/../lib/libcore-c3ca5d77d81b46c1-0.6.so
#7  0x00007ffff7d43841 in sys::begin_unwind::_7cd364c41f10422f::_06 () from /usr/local/bin/../lib/libcore-c3ca5d77d81b46c1-0.6.so
#8  0x00007ffff7706978 in ast_util::variant_def_ids::_3d7eb41736c5c9c2::_06 () from /usr/local/bin/../lib/libsyntax-84efebcb12c867a2-0.6.so
#9  0x00007ffff6fce8de in middle::typeck::check::_match::check_pat_variant::_d8e21dceec5748a4::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#10 0x00007ffff6fc5ad1 in middle::typeck::check::_match::check_pat::_247b57ac05e9c3a::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#11 0x00007ffff6fc4b81 in middle::typeck::check::_match::check_match::anon::anon::expr_fn_46280 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#12 0x00007ffff6fc0d1e in middle::typeck::check::_match::check_match::_65f784dac8c7f663::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#13 0x00007ffff7074177 in middle::typeck::check::check_expr_with_unifier::_25cf209ab3c96f51::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#14 0x00007ffff7415bd4 in __morestack () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#15 0x00007ffff7097cf5 in middle::typeck::check::check_block_with_expected::_888444d59fddd80::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#16 0x00007ffff7034e69 in middle::typeck::check::check_fn::_ecb27be33c3c5a40::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#17 0x00007ffff7033801 in middle::typeck::check::check_bare_fn::_c72a4e9be7a1727::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#18 0x00007ffff7032470 in middle::typeck::check::check_item::_a08daccad7d15d75::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#19 0x00007ffff7752d4d in visit::mk_simple_visitor::anon::expr_fn_14978 () from /usr/local/bin/../lib/libsyntax-84efebcb12c867a2-0.6.so
#20 0x00007ffff7752ad4 in visit::mk_simple_visitor::anon::expr_fn_14968 () from /usr/local/bin/../lib/libsyntax-84efebcb12c867a2-0.6.so
#21 0x00007ffff7031eaa in middle::typeck::check::check_item_types::_d2cbaf833791f793::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#22 0x00007ffff715e7f3 in middle::typeck::check_crate::_22e2488ce88a679::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#23 0x00007ffff73d3920 in driver::driver::compile_rest::_322442719405eb4::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#24 0x00007ffff7415bd4 in __morestack () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#25 0x00007ffff73d8237 in driver::driver::compile_upto::_0d5725aa2ada48::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#26 0x00007ffff7415bd4 in __morestack () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#27 0x00007ffff73d8639 in driver::driver::compile_input::_6fac692b26553d54::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#28 0x00007ffff74067ef in run_compiler::_104083f5e46aacf5::_06 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#29 0x00007ffff7413511 in monitor::anon::expr_fn_82475 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#30 0x00007ffff740f93b in task::__extensions__::try_81986::anon::expr_fn_82249 () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#31 0x00007ffff7415bd4 in __morestack () from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so
#32 0x00007ffff7dc167e in task::spawn::spawn_raw::make_child_wrapper::anon::expr_fn_12367 () from /usr/local/bin/../lib/libcore-c3ca5d77d81b46c1-0.6.so
#33 0x00007ffff7e41034 in __morestack () from /usr/local/bin/../lib/libcore-c3ca5d77d81b46c1-0.6.so
#34 0x00007ffff54b7d14 in task_start_wrapper (a=0x7ffff0109670) at /run/media/jdm/ssd/rust/src/rt/rust_task.cpp:162

[catamorphism]

Fixed pending #6200

[catamorphism]

Fixed in 517bfc9