ICE with boxed closure includes argument with lifetime and Drop

[seanmonstar]

Code:

struct Foo<'a> {
    a: &'a str
}

impl<'a> Drop for Foo<'a> {
    fn drop(&mut self) {}
}

fn main() {
    let _: Vec<Box<Fn(Foo)>> = Vec::new();
}

Error:

error: internal compiler error: cannot relate bound region: ReScope(DestructionScope(26)) <= ReLateBound(DebruijnIndex { depth: 1 }, BrAnon(0))

Backtrace using 1.0.0-beta.5 (also occurs with rustc 1.1.0-nightly (c2b30b86d 2015-05-12) (built 2015-05-13)):

thread 'rustc' panicked at 'Box<Any>', /home/rustbuild/src/rust-buildbot/slave/beta-dist-rustc-linux/build/src/libsyntax/diagnostic.rs:149

stack backtrace:
   1:     0x7f4ed2c18429 - sys::backtrace::write::h3fdf06e7a8dd7bced4r
   2:     0x7f4ed2c20136 - panicking::on_panic::hdc3f6d7788894b93jrw
   3:     0x7f4ed2be3442 - rt::unwind::begin_unwind_inner::h93ec8cb6029f2822t6v
   4:     0x7f4ed01ae43d - rt::unwind::begin_unwind::h13038079570089827110
   5:     0x7f4ed01ae3d2 - diagnostic::SpanHandler::span_bug::h81555737e15010e3EqB
   6:     0x7f4ed0c8079e - middle::infer::region_inference::RegionVarBindings<'a, 'tcx>::make_subregion::ha14bc637a5d82b0dtiv
   7:     0x7f4ed0c9ad2d - middle::infer::mk_subr::h5555b742f1f8903eXWy
   8:     0x7f4ed19c6524 - check::regionck::type_must_outlive::h45e3ba7d488e34d2QBe
   9:     0x7f4ed19c4489 - check::dropck::iterate_over_potentially_unsafe_regions_in_type::h582cacd73f4ee5f6CDa
  10:     0x7f4ed19c45e4 - check::dropck::iterate_over_potentially_unsafe_regions_in_type::h582cacd73f4ee5f6CDa
  11:     0x7f4ed19c45e4 - check::dropck::iterate_over_potentially_unsafe_regions_in_type::h582cacd73f4ee5f6CDa
  12:     0x7f4ed19c45e4 - check::dropck::iterate_over_potentially_unsafe_regions_in_type::h582cacd73f4ee5f6CDa
  13:     0x7f4ed19c3218 - check::dropck::check_safety_of_destructor_if_necessary::hd55366388bca82c5Mxa
  14:     0x7f4ed19f508d - check::regionck::check_safety_of_rvalue_destructor_if_necessary::h34584ca2e6bb57b0gXd
  15:     0x7f4ed19eebcf - check::regionck::visit_expr::h410fd5fb32b6f6c0Yhd
  16:     0x7f4ed19ecd7d - check::regionck::Rcx<'a, 'tcx>::visit_fn_body::h8dbb31ea8fa0d01apUc
  17:     0x7f4ed1a668a6 - check::check_bare_fn::he66bf0548da8b8d1twn
  18:     0x7f4ed1a6f09c - check::check_method_body::h5b78b6a12b2b5463Y7n
  19:     0x7f4ed1a64568 - check::CheckItemBodiesVisitor<'a, 'tcx>.Visitor<'tcx>::visit_item::h5534b4c58b22cf23wtn
  20:     0x7f4ed1b286aa - check_crate::closure.38021
  21:     0x7f4ed1b23a40 - check_crate::h44f7d6f01042e613XcC
  22:     0x7f4ed315bc88 - driver::phase_3_run_analysis_passes::h071f1f038f4270canGa
  23:     0x7f4ed313cd85 - driver::compile_input::hc5c2173550d25b21Qba
  24:     0x7f4ed31fe551 - run_compiler::h5fd7a3cba8c0dcd3z4b
  25:     0x7f4ed31fc1a2 - boxed::F.FnBox<A>::call_box::h13268679164253669965
  26:     0x7f4ed31fb6d9 - rt::unwind::try::try_fn::h1333595601538020842
  27:     0x7f4ed2c92aa8 - rust_try_inner
  28:     0x7f4ed2c92a95 - rust_try
  29:     0x7f4ed31fb988 - boxed::F.FnBox<A>::call_box::h18060233810932446010
  30:     0x7f4ed2c1f021 - sys::thread::create::thread_start::h7002e49f5ed4f198aqv
  31:     0x7f4ecd4a1181 - start_thread
  32:     0x7f4ed286947c - __clone
  33:                0x0 - <unknown>

Playpen: http://is.gd/s4uWQW

[seanmonstar]

tag ICE, destructors, closures?