ICE 'allocation missing in dead_alloc_map' in rustc_mir::interpret when compiling Servo #55223

thread 'main' panicked at 'allocation missing in dead_alloc_map', libcore/option.rs:1008:5
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   1: std::sys_common::backtrace::print
             at libstd/sys_common/backtrace.rs:71
             at libstd/sys_common/backtrace.rs:59
   2: std::panicking::default_hook::{{closure}}
             at libstd/panicking.rs:211
   3: std::panicking::default_hook
             at libstd/panicking.rs:227
   4: rustc::util::common::panic_hook
   5: std::panicking::rust_panic_with_hook
             at libstd/panicking.rs:480
   6: std::panicking::continue_panic_fmt
             at libstd/panicking.rs:390
   7: rust_begin_unwind
             at libstd/panicking.rs:325
   8: core::panicking::panic_fmt
             at libcore/panicking.rs:77
   9: core::option::expect_failed
             at libcore/option.rs:1008
  10: <rustc_mir::interpret::memory::Memory<'a, 'mir, 'tcx, M>>::check_align
  11: rustc_mir::interpret::validity::<impl rustc_mir::interpret::eval_context::EvalContext<'a, 'mir, 'tcx, M>>::validate_primitive_type
  12: rustc_mir::interpret::validity::<impl rustc_mir::interpret::eval_context::EvalContext<'a, 'mir, 'tcx, M>>::validate_operand
  13: rustc_mir::interpret::validity::<impl rustc_mir::interpret::eval_context::EvalContext<'a, 'mir, 'tcx, M>>::validate_operand
  14: rustc_mir::interpret::validity::<impl rustc_mir::interpret::eval_context::EvalContext<'a, 'mir, 'tcx, M>>::validate_operand
  15: rustc_lint::builtin::check_const
  16: <rustc_lint::register_builtins::BuiltinCombinedLateLintPass as rustc::lint::LateLintPass<'a, 'tcx>>::check_item
  17: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item
  18: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod
  19: rustc::hir::intravisit::walk_item
  20: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item
  21: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod
  22: rustc::hir::intravisit::walk_item
  23: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item
  24: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod
  25: rustc::hir::intravisit::walk_item
  26: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item
  27: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod
  28: rustc::hir::intravisit::walk_item
  29: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item
  30: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod
  31: rustc::hir::intravisit::walk_crate
  32: rustc::lint::context::check_crate
  33: rustc::util::common::time
  34: rustc::ty::context::tls::enter_context
  35: <std::thread::local::LocalKey<T>>::with
  36: rustc::ty::context::TyCtxt::create_and_enter
  37: rustc_driver::driver::compile_input
  38: rustc_driver::run_compiler_with_pool
  39: rustc_driver::driver::spawn_thread_pool
  40: rustc_driver::run_compiler
  41: <scoped_tls::ScopedKey<T>>::set
  42: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
  43: __rust_maybe_catch_panic
             at libpanic_unwind/lib.rs:102
  44: rustc_driver::run
  45: rustc_driver::main
  46: std::rt::lang_start::{{closure}}
  47: std::panicking::try::do_call
             at libstd/rt.rs:59
             at libstd/panicking.rs:310
  48: __rust_maybe_catch_panic
             at libpanic_unwind/lib.rs:102
  49: std::rt::lang_start_internal
             at libstd/panicking.rs:289
             at libstd/panic.rs:392
             at libstd/rt.rs:58
  50: main
  51: __libc_start_main
  52: <unknown>
query stack during panic:
end of query stack

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.31.0-nightly (78ff609d7 2018-10-19) running on x86_64-unknown-linux-gnu

note: compiler flags: -C debuginfo=2 -C link-args=-fuse-ld=gold --crate-type lib

note: some of the compiler flags provided by cargo are hidden

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