[Internal compiler error] missing MIR for DefId(7/0:8 ~ cortex_m_rt[ba29]::lang_items[0]::start[0])

[niklasad1]

Summary

Hi,
I tried building the crate cortex-m-quickstart

Issue

By using the following option

$ xargo build --target thumbv7m-none-eabi --example hello

The compiler crashes

Backtrace

error: internal compiler error: librustc_metadata/cstore_impl.rs:131: get_optimized_mir: missing MIR for `DefId(7/0:8 ~ cortex_m_rt[ba29]::lang_items[0]::start[0])`

thread 'rustc' panicked at 'Box<Any>', librustc_errors/lib.rs:535:9
stack backtrace:
   0:     0x7f91f34a0dd3 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h8b81594645a24a27
                               at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   1:     0x7f91f3498284 - std::sys_common::backtrace::_print::h9bc07d566820e560
                               at libstd/sys_common/backtrace.rs:71
   2:     0x7f91f349d9dd - std::panicking::default_hook::{{closure}}::h8061f115b067df97
                               at libstd/sys_common/backtrace.rs:59
                               at libstd/panicking.rs:380
   3:     0x7f91f349d6e2 - std::panicking::default_hook::hd067eb3eb1a62c48
                               at libstd/panicking.rs:396
   4:     0x7f91f349de50 - std::panicking::rust_panic_with_hook::h45183031f05ee04c
                               at libstd/panicking.rs:576
   5:     0x7f91ef035458 - std::panicking::begin_panic::h70fa20d14e5a4ddc
   6:     0x7f91ef0570e5 - rustc_errors::Handler::bug::h2904d9bdcd541660
   7:     0x7f91f020883f - rustc::session::opt_span_bug_fmt::{{closure}}::h4c61b14203cd7ef9
   8:     0x7f91f02bfb35 - rustc::ty::context::tls::with_opt::{{closure}}::ha844ec3aba1227ce
   9:     0x7f91eff076af - <std::thread::local::LocalKey<T>>::try_with::hcb9878a339eb8184
  10:     0x7f91eff07246 - <std::thread::local::LocalKey<T>>::with::h0e7a6f77ef5003ad
  11:     0x7f91f02bf846 - rustc::ty::context::tls::with::h76fef2b9234bce83
  12:     0x7f91f02bfae7 - rustc::ty::context::tls::with_opt::hcffffd6da58fec15
  13:     0x7f91f0208744 - rustc::session::opt_span_bug_fmt::h2670479fe31ed596
  14:     0x7f91f0208606 - rustc::session::bug_fmt::hcb5a7103fba7bc90
  15:     0x7f91f1bf5559 - rustc_metadata::cstore_impl::provide_extern::optimized_mir::h2b8092d8086279cf
  16:     0x7f91f00b1839 - rustc::dep_graph::graph::DepGraph::with_task_impl::hea0bff9ad23e8d9d
  17:     0x7f91f0378909 - rustc::ty::maps::<impl rustc::ty::maps::queries::optimized_mir<'tcx>>::force::h2a013a1ceee4a829
  18:     0x7f91f0379466 - rustc::ty::maps::<impl rustc::ty::maps::queries::optimized_mir<'tcx>>::try_get::he58f4a5856cbcfcd
  19:     0x7f91f04871da - rustc::ty::maps::TyCtxtAt::optimized_mir::hf8d473ea184aa7da
  20:     0x7f91f02d750d - rustc::ty::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::instance_mir::h05068563e01c8813
  21:     0x7f91f0ed3845 - rustc_mir::monomorphize::collector::collect_items_rec::hb5c49ef42474d3b7
  22:     0x7f91f0ed3053 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h43e3331c1491c656
  23:     0x7f91e86c36b1 - rustc_trans::base::collect_and_partition_translation_items::h667c557b0c893845
  24:     0x7f91f0098afc - rustc::dep_graph::graph::DepGraph::with_task_impl::h7d3113ca1706e263
  25:     0x7f91f045eca1 - rustc::ty::maps::<impl rustc::ty::maps::queries::collect_and_partition_translation_items<'tcx>>::force::hdb41ca31cf6c6f5d
  26:     0x7f91f045f823 - rustc::ty::maps::<impl rustc::ty::maps::queries::collect_and_partition_translation_items<'tcx>>::try_get::h866a092f65a06f6b
  27:     0x7f91f048c775 - rustc::ty::maps::TyCtxtAt::collect_and_partition_translation_items::h034204a218ee8b34
  28:     0x7f91f048573e - rustc::ty::maps::<impl rustc::ty::context::TyCtxt<'a, 'tcx, 'lcx>>::collect_and_partition_translation_items::h73a73cb71fea4e24
  29:     0x7f91e86bf07b - rustc_trans::base::trans_crate::ha8659d307fbf5033
  30:     0x7f91e871bd27 - <rustc_trans::LlvmTransCrate as rustc_trans_utils::trans_crate::TransCrate>::trans_crate::he1083cc248ab0e98
  31:     0x7f91f3852562 - rustc_driver::driver::phase_4_translate_to_llvm::hfdc184ff560761c5
  32:     0x7f91f384b80e - rustc_driver::driver::compile_input::{{closure}}::ha4254b2145dd86d8
  33:     0x7f91f37e68fe - rustc::ty::context::TyCtxt::create_and_enter::he3e4f3930d406ef0
  34:     0x7f91f38497bb - rustc_driver::driver::compile_input::hd2a6444b7fba6805
  35:     0x7f91f38665fa - rustc_driver::run_compiler::h23eec633cdb60fc2
  36:     0x7f91f379271a - std::sys_common::backtrace::__rust_begin_short_backtrace::h8832fd8a58b18629
  37:     0x7f91f34b6b8e - __rust_maybe_catch_panic
                               at libpanic_unwind/lib.rs:102
  38:     0x7f91f37cb896 - <F as alloc::boxed::FnBox<A>>::call_box::hbb7d5a5401bfb959
  39:     0x7f91f34ade1b - std::sys::unix::thread::Thread::new::thread_start::hdd261da30813e955
                               at /checkout/src/liballoc/boxed.rs:798
                               at libstd/sys_common/thread.rs:24
                               at libstd/sys/unix/thread.rs:90
  40:     0x7f91ee3987fb - start_thread
  41:     0x7f91f3166b5e - clone
  42:                0x0 - <unknown>

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 1.25.0-nightly (4d2d3fc5d 2018-02-13) running on x86_64-unknown-linux-gnu

Meta

Tested toolchains:

• rustc 1.24.0-nightly (8e7a609e6 2018-01-04)
• rustc 1.25.0-nightly (4d2d3fc5d 2018-02-13)

$ xargo -V                           
xargo 0.3.8
cargo 0.24.0 (45043115c 2017-12-05)

cc @japaric

[japaric]

I tried building the crate cortex-m-quickstart

What version of cortex-m-quickstart are you building? The issue you are reporting has been fixed in cortex-m-quickstart some time ago.

[niklasad1]

Thanks, it was 1.9.0 seems to work better with 0.2.4

[japaric]

I would suggest closing this issue as it's not actionable: stuff that compiled with last year nightly will certainly not compile with today's nightly.

If you want to make this issue actionable: the problem is that the new-ish Termination stuff crashes the compiler when misused (as explained in #47040 (comment)) so the issue should request the misuse reporting a proper error message instead of crashing.