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rustc panic #52408

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d653 opened this issue Jul 15, 2018 · 1 comment
Closed

rustc panic #52408

d653 opened this issue Jul 15, 2018 · 1 comment

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@d653
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d653 commented Jul 15, 2018

The code that triggers the bug is divided in two crates, if I try to merge the code to a single crate then it compiles without a panic.

Cargo.toml

[package]
name = "bug"
version = "0.3.0"
authors = ["..."]

[dependencies]
tokio-core = "^0.1"
bug2 = { path = "../bug2" }

main.rs

extern crate tokio_core;
extern crate bug2;
use tokio_core::reactor::Core;
fn main() {
    bug2::test("aaa", Core::new().unwrap().handle());
}

Cargo.toml

[package]
name = "bug2"
version = "0.1.0"
authors = ["..."]

[dependencies]
futures = "^0.1"
tokio-core = "^0.1"

lib.rs

extern crate futures;
extern crate tokio_core;

use futures::stream::Stream;
use futures::sync::mpsc;
use tokio_core::reactor::Handle;
use futures::Future;


fn f2(_ : &Handle){
}


fn f1(receiver: mpsc::UnboundedReceiver<()>, handle : Handle) -> impl Future<Item=(),Error=()> {
    receiver.map(move |_|{
        f2(&handle);
    }).for_each(|_|Ok(()))
}


pub fn test<T: AsRef<str>>(_: T, handle: Handle) {
    handle.spawn(f1(mpsc::unbounded().1,handle.clone()));
}

Result:

$ RUST_BACKTRACE=full cargo build 
   Compiling libc v0.2.42
   Compiling nodrop v0.1.12                                                                                           
   Compiling cfg-if v0.1.4                                                                                            
   Compiling scopeguard v0.3.3                                                                                        
   Compiling byteorder v1.2.3                                                                                         
   Compiling lazy_static v1.0.2                                                                                       
   Compiling memoffset v0.2.1                                                                                         
   Compiling futures v0.1.23                                                                                          
   Compiling lazycell v0.6.0                                                                                          
   Compiling slab v0.4.0                                                                                              
   Compiling scoped-tls v0.1.2                                                                                        
   Compiling arrayvec v0.4.7                                                                                          
   Compiling crossbeam-utils v0.3.2                                                                                   
   Compiling log v0.4.3                                                                                               
   Compiling iovec v0.1.2                                                                                             
   Compiling net2 v0.2.33                                                                                             
   Compiling rand v0.4.2                                                                                              
   Compiling num_cpus v1.8.0                                                                                          
   Compiling bytes v0.4.8                                                                                             
   Compiling crossbeam-epoch v0.4.3                                                                                   
   Compiling mio v0.6.15                                                                                              
   Compiling crossbeam-deque v0.3.1                                                                                   
   Compiling tokio-executor v0.1.2                                                                                    
   Compiling tokio-io v0.1.7                                                                                          
   Compiling tokio-threadpool v0.1.5                                                                                  
   Compiling tokio-timer v0.2.4                                                                                       
   Compiling tokio-codec v0.1.0                                                                                       
   Compiling tokio-reactor v0.1.2                                                                                     
   Compiling tokio-fs v0.1.2                                                                                          
   Compiling tokio-tcp v0.1.0                                                                                         
   Compiling tokio-udp v0.1.1                                                                                         
   Compiling tokio v0.1.7                                                                                             
   Compiling tokio-core v0.1.17                                                                                       
   Compiling bug2 v0.1.0 (file:///home/me/sources/antistorm/bug2)                                                     
   Compiling bug v0.3.0 (file:///home/me/sources/antistorm/bug)                                                       
error: internal compiler error: librustc_mir/monomorphize/collector.rs:760: Cannot create local mono-item for DefId(43/0:9 ~ bug2[df2b]::f2[0])

thread 'main' panicked at 'Box<Any>', librustc_errors/lib.rs:554:9
stack backtrace:
   0:     0x7f06ef7e044e - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::hd6c46a9a697d3bb0
                               at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   1:     0x7f06ef7b7d36 - std::sys_common::backtrace::print::hb45c2623ee574a87
                               at libstd/sys_common/backtrace.rs:71
                               at libstd/sys_common/backtrace.rs:59
   2:     0x7f06ef7e947d - std::panicking::default_hook::{{closure}}::h07311e63483c372f
                               at libstd/panicking.rs:211
   3:     0x7f06ef7e91f0 - std::panicking::default_hook::h028233b8c65b3bae
                               at libstd/panicking.rs:227
   4:     0x7f06ebe83395 - rustc::util::common::panic_hook::hf2c45cd370f93067
   5:     0x7f06ef7e9b43 - std::panicking::rust_panic_with_hook::haf5fc7b5dee91fb6
                               at libstd/panicking.rs:479
   6:     0x7f06eac56f3e - std::panicking::begin_panic::h7d35788894d6c658
   7:     0x7f06eac52811 - rustc_errors::Handler::bug::heb8a9758863e3156
   8:     0x7f06ebae270c - rustc::session::opt_span_bug_fmt::{{closure}}::h5382608adf0a2b3b
   9:     0x7f06ebb9bf59 - rustc::ty::context::tls::with_opt::{{closure}}::h977b3c480aed1c06
  10:     0x7f06ebae35df - rustc::ty::context::tls::with_context_opt::hab811a2b405ba06e
  11:     0x7f06ebb9b9f6 - rustc::ty::context::tls::with_opt::h9dbcf2abf5eccedf
  12:     0x7f06eba311b4 - rustc::session::opt_span_bug_fmt::h8a2450256e82837a
  13:     0x7f06eba31126 - rustc::session::bug_fmt::he893b82c41367e01
  14:     0x7f06ec8d99b9 - rustc_mir::monomorphize::collector::should_monomorphize_locally::h61f3fc7939397156
  15:     0x7f06ec8d9634 - rustc_mir::monomorphize::collector::visit_instance_use::ha5b4c96d3a4a65ef
  16:     0x7f06ec8d9602 - rustc_mir::monomorphize::collector::visit_fn_use::h0faca38b45594912
  17:     0x7f06ec8d910c - <rustc_mir::monomorphize::collector::MirNeighborCollector<'a, 'tcx> as rustc::mir::visit::Visitor<'tcx>>::visit_terminator_kind::h2c72726e7afc51de
  18:     0x7f06ec8d7ac1 - rustc_mir::monomorphize::collector::collect_items_rec::h0f4189260a5f2b34
  19:     0x7f06ec8d80f9 - rustc_mir::monomorphize::collector::collect_items_rec::h0f4189260a5f2b34
  20:     0x7f06ec8d80f9 - rustc_mir::monomorphize::collector::collect_items_rec::h0f4189260a5f2b34
  21:     0x7f06ec8d80f9 - rustc_mir::monomorphize::collector::collect_items_rec::h0f4189260a5f2b34
  22:     0x7f06ec8d80f9 - rustc_mir::monomorphize::collector::collect_items_rec::h0f4189260a5f2b34
  23:     0x7f06ec8d80f9 - rustc_mir::monomorphize::collector::collect_items_rec::h0f4189260a5f2b34
  24:     0x7f06ec8d80f9 - rustc_mir::monomorphize::collector::collect_items_rec::h0f4189260a5f2b34
  25:     0x7f06ec8d80f9 - rustc_mir::monomorphize::collector::collect_items_rec::h0f4189260a5f2b34
  26:     0x7f06ecb351b0 - rustc_mir::monomorphize::collector::collect_crate_mono_items::{{closure}}::hfe149b0b8cb481eb
  27:     0x7f06ecb0d8c4 - rustc::util::common::time::hf897241d402a4e9e
  28:     0x7f06ec8d5ce0 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h64944a52b0a9edc3
  29:     0x7f06e54f7276 - rustc::util::common::time::h0d7f9f0f8494d94e
  30:     0x7f06e55b0f94 - rustc_codegen_llvm::base::collect_and_partition_mono_items::h7a7c84af63c01538
  31:     0x7f06ebb9dae8 - rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::collect_and_partition_mono_items<'tcx>>::compute::h4cdf9fe96888402e
  32:     0x7f06ebb165e4 - rustc::ty::context::tls::with_context::hc07a3cde95f6473f
  33:     0x7f06eb96641e - rustc::dep_graph::graph::DepGraph::with_task_impl::h144e93e8e7db8c82
  34:     0x7f06ebb435db - rustc::ty::context::tls::with_related_context::h3c918fef702c76f1
  35:     0x7f06ebc92377 - rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::force_query_with_job::h9845e745f16d383c
  36:     0x7f06ebd5dbd9 - rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query::ha0bb465fedd5ab61
  37:     0x7f06e55b9820 - <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_utils::codegen_backend::CodegenBackend>::codegen_crate::h050f6f9fdd741ee2
  38:     0x7f06efb92131 - rustc::util::common::time::hf3bdbd3076e65138
  39:     0x7f06efb8627c - rustc_driver::driver::phase_4_codegen::h6d218d66ccc5b3b1
  40:     0x7f06efb42e38 - rustc_driver::driver::compile_input::{{closure}}::h3ae3822eda7126fa
  41:     0x7f06efb3e3c9 - rustc::ty::context::tls::enter_context::h172e3a71948cf3e8
  42:     0x7f06efbcab7a - <std::thread::local::LocalKey<T>>::with::hbc082df5ff4b92fe
  43:     0x7f06efc3cbbd - rustc::ty::context::TyCtxt::create_and_enter::h140543bc115628f6
  44:     0x7f06efb7fd7c - rustc_driver::driver::compile_input::h77799d53c7077f32
  45:     0x7f06efc0a2c0 - rustc_driver::run_compiler_with_pool::hf70f7dd371076d1f
  46:     0x7f06efb45e7c - <scoped_tls::ScopedKey<T>>::set::hea0904c0d7dcea9c
  47:     0x7f06efb45b71 - <scoped_tls::ScopedKey<T>>::set::h2f59f8491f17e599
  48:     0x7f06efba120a - syntax::with_globals::hb4d6561660afb38b
  49:     0x7f06efb445f2 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h51855e0168324012
  50:     0x7f06ef7f69b9 - __rust_maybe_catch_panic
                               at libpanic_unwind/lib.rs:106
  51:     0x7f06efc07754 - rustc_driver::run::hfad78015aa66f902
  52:     0x7f06efc16eea - rustc_driver::main::hc68ca44052c5c3d1
  53:     0x5572bc845b52 - std::rt::lang_start::{{closure}}::h169c2960103a293d
  54:     0x7f06ef7e9582 - std::panicking::try::do_call::h4ae9a4c7ba6e1e81
                               at libstd/rt.rs:59
                               at libstd/panicking.rs:310
  55:     0x7f06ef7f69b9 - __rust_maybe_catch_panic
                               at libpanic_unwind/lib.rs:106
  56:     0x7f06ef7cbca5 - std::rt::lang_start_internal::hea52cc5b4fec6cb8
                               at libstd/panicking.rs:289
                               at libstd/panic.rs:392
                               at libstd/rt.rs:58
  57:     0x5572bc845bb3 - main
  58:     0x7f06ef3c2f29 - __libc_start_main
  59:     0x5572bc845a38 - <unknown>
query stack during panic:
#0 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
error: aborting due to previous error


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 1.29.0-nightly (254f8796b 2018-07-13) running on x86_64-unknown-linux-gnu

note: compiler flags: -C debuginfo=2 -C incremental --crate-type bin

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

error: Could not compile `bug`.                                                                                       

To learn more, run the command again with --verbose.
@pietroalbini
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Duplicate of #50865

@pietroalbini pietroalbini marked this as a duplicate of #50865 Jul 15, 2018
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@d653 @pietroalbini