[ICE] assertion failed: `(left == right) && (right == left)` (left: `11`, right: `0`)

[Bastacyclop]

I have no idea where is the problem coming from, so I have no minimal example.
It happened with a Box2D binding I'm currently working on.
The binding is compiling fine but not the example:

[basta@manjaro rust_box2d]$ RUST_BACKTRACE=1 cargo test
unused manifest key: package.license
   Compiling rust_box2d v0.2.0 (file:///home/basta/Projects/rust_box2d)
/home/basta/Projects/rust_box2d/examples/example.rs:5:10: 5:15 warning: unused import, #[warn(unused_imports)] on by default
/home/basta/Projects/rust_box2d/examples/example.rs:5 use b2::{Owned, Ref, RefMut};
                                                               ^~~~~
/home/basta/Projects/rust_box2d/examples/example.rs:5:17: 5:20 warning: unused import, #[warn(unused_imports)] on by default
/home/basta/Projects/rust_box2d/examples/example.rs:5 use b2::{Owned, Ref, RefMut};
                                                                      ^~~
/home/basta/Projects/rust_box2d/examples/example.rs:5:22: 5:28 warning: unused import, #[warn(unused_imports)] on by default
/home/basta/Projects/rust_box2d/examples/example.rs:5 use b2::{Owned, Ref, RefMut};
                                                                           ^~~~~~
error: internal compiler error: unexpected failure
note: the compiler hit an unexpected failure path. this is a bug.
note: we would appreciate a bug report: http://doc.rust-lang.org/complement-bugreport.html
note: run with `RUST_BACKTRACE=1` for a backtrace
task 'rustc' failed at 'assertion failed: `(left == right) && (right == left)` (left: `11`, right: `0`)', /home/rustbuild/src/rust-buildbot/slave/nightly-linux/build/src/librustc/middle/trans/base.rs:517

stack backtrace:
   1:     0x7f2ce9982770 - rt::backtrace::imp::write::h8cd99dff1e402ef9UZq
   2:     0x7f2ce9985920 - failure::on_fail::ha41409a33267b3c2Blr
   3:     0x7f2cea150510 - unwind::begin_unwind_inner::h8c1fbf5424a0d801Zie
   4:     0x7f2cea150210 - unwind::begin_unwind_fmt::h7d1a8b26e8f4f235pge
   5:     0x7f2cea8f3bf0 - middle::trans::base::get_res_dtor::haffd43b5c98b1ff2fvb
   6:     0x7f2cea8f38b0 - middle::trans::glue::trans_struct_drop::ha623b901491bd7beDVY
   7:     0x7f2cea8f3840 - middle::trans::glue::trans_struct_drop_flag::closure.114447
   8:     0x7f2cea8f3630 - middle::trans::base::with_cond::h5f39b86e2535fff7Bnc
   9:     0x7f2cea8f1470 - middle::trans::glue::make_drop_glue::as_closure.114413
  10:     0x7f2cea8f0450 - middle::trans::glue::make_generic_glue::h3252634c1ae5afcenoZ
  11:     0x7f2cea8eeaf0 - middle::trans::glue::get_drop_glue::h8f3e6346e22e028dDLY
  12:     0x7f2cea8ee9d0 - middle::trans::glue::drop_ty::haf109e2809857511hJY
  13:     0x7f2cea9fe920 - middle::trans::cleanup::DropValue.Cleanup::trans::h59af69c9d899b958Fpw
  14:     0x7f2cea9fc0f0 - middle::trans::cleanup::FunctionContext<'a>.CleanupHelperMethods<'a>::trans_cleanups_to_exit_scope::h0a28401680f9217b3Uv
  15:     0x7f2cea9ffe80 - middle::trans::cleanup::FunctionContext<'a>.CleanupHelperMethods<'a>::get_or_create_landing_pad::h5f72f4eb3dad1f31Tbw
  16:     0x7f2cea978720 - middle::trans::cleanup::FunctionContext<'a>.CleanupMethods<'a>::get_landing_pad::h915a0bc2fa152c11PHv
  17:     0x7f2cea8f5430 - middle::trans::base::invoke::h835930d70a255d9bC2b
  18:     0x7f2cea8e2410 - middle::trans::callee::trans_call_inner::hd5b053a59a029edbhZ0
  19:     0x7f2cea924960 - middle::trans::expr::trans_overloaded_op::h2c12d4646782278f7O3
  20:     0x7f2cea92ff20 - middle::trans::expr::deref_once::h89a80c5bee3ba998ih4
  21:     0x7f2cea8da700 - middle::trans::expr::trans::h9fde924695247345yP1
  22:     0x7f2cea90ffe0 - middle::trans::callee::trans_args::h94aa490682ec9488ek1
  23:     0x7f2cea8e2410 - middle::trans::callee::trans_call_inner::hd5b053a59a029edbhZ0
  24:     0x7f2cea90ab00 - middle::trans::callee::trans_method_call::h09857d1ff4ef116cvU0
  25:     0x7f2cea9184f0 - middle::trans::expr::trans_rvalue_dps_unadjusted::hf838e4d6ac48b5a0gG2
  26:     0x7f2cea8d8ff0 - middle::trans::expr::trans_into::h649653a95c0f1ba5CL1
  27:     0x7f2cea9184f0 - middle::trans::expr::trans_rvalue_dps_unadjusted::hf838e4d6ac48b5a0gG2
  28:     0x7f2cea917700 - middle::trans::expr::trans_unadjusted::hc3387fb48b9faca2781
  29:     0x7f2cea8da700 - middle::trans::expr::trans::h9fde924695247345yP1
  30:     0x7f2cea8d8eb0 - middle::trans::expr::trans_to_lvalue::h275612bee7c33b29971
  31:     0x7f2cea922c80 - middle::trans::expr::trans_addr_of::hb328313e7153cbaa6w3
  32:     0x7f2cea917700 - middle::trans::expr::trans_unadjusted::hc3387fb48b9faca2781
  33:     0x7f2cea8d8ff0 - middle::trans::expr::trans_into::h649653a95c0f1ba5CL1
  34:     0x7f2cea92b310 - middle::trans::expr::trans_adt::hda12d7a3d0f04bafBg3
  35:     0x7f2cea9184f0 - middle::trans::expr::trans_rvalue_dps_unadjusted::hf838e4d6ac48b5a0gG2
  36:     0x7f2cea917700 - middle::trans::expr::trans_unadjusted::hc3387fb48b9faca2781
  37:     0x7f2cea8da700 - middle::trans::expr::trans::h9fde924695247345yP1
  38:     0x7f2cea8d8eb0 - middle::trans::expr::trans_to_lvalue::h275612bee7c33b29971
  39:     0x7f2cea9299d0 - middle::trans::_match::trans_match::h288aefea821abbe87tg
  40:     0x7f2cea9184f0 - middle::trans::expr::trans_rvalue_dps_unadjusted::hf838e4d6ac48b5a0gG2
  41:     0x7f2cea8d8ff0 - middle::trans::expr::trans_into::h649653a95c0f1ba5CL1
  42:     0x7f2cea8d9580 - middle::trans::controlflow::trans_block::h64bf3c764c6ae1b0g4X
  43:     0x7f2cea9184f0 - middle::trans::expr::trans_rvalue_dps_unadjusted::hf838e4d6ac48b5a0gG2
  44:     0x7f2cea8d8ff0 - middle::trans::expr::trans_into::h649653a95c0f1ba5CL1
  45:     0x7f2cea8d84f0 - middle::trans::controlflow::trans_stmt_semi::ha1fb99ce3edb0c48m3X
  46:     0x7f2cea8d7c20 - middle::trans::controlflow::trans_stmt::h2f04ce0d083156615YX
  47:     0x7f2cea8d9580 - middle::trans::controlflow::trans_block::h64bf3c764c6ae1b0g4X
  48:     0x7f2cea981580 - middle::trans::base::trans_closure::h98df0502771bceb0Pcd
  49:     0x7f2cea8cad10 - middle::trans::base::trans_fn::h9827ee2f1991a21dCod
  50:     0x7f2cea8c6300 - middle::trans::base::trans_item::h6eac98275cebe034CGd
  51:     0x7f2cea98bc10 - middle::trans::base::trans_crate::h5cb30c85f982b3b7cBe
  52:     0x7f2cead51570 - driver::driver::phase_4_translate_to_llvm::h7a29ae2a079bac6cf6w
  53:     0x7f2cead48850 - driver::driver::compile_input::h4c4e2d8a00ea2981GIw
  54:     0x7f2ceaddc920 - driver::run_compiler::h5959ab20bfeb7861zfA
  55:     0x7f2ceaddc830 - driver::main_args::closure.137251
  56:     0x7f2ceadee700 - task::TaskBuilder<S>::try_future::closure.138371
  57:     0x7f2ceadee500 - task::TaskBuilder<S>::spawn_internal::closure.138348
  58:     0x7f2ceb8125f0 - task::spawn_opts::closure.8365
  59:     0x7f2cea1a8a90 - rust_try_inner
  60:     0x7f2cea1a8a80 - rust_try
  61:     0x7f2cea14db80 - unwind::try::hcf2c1555445335c8f7d
  62:     0x7f2cea14d920 - task::Task::run::h03e40729a1df1ac2zdd
  63:     0x7f2ceb8123b0 - task::spawn_opts::closure.8311
  64:     0x7f2cea14f760 - thread::thread_start::h194d23d584ee3229lCd
  65:     0x7f2ce941a060 - start_thread
  66:     0x7f2ce9e1d489 - __clone
  67:                0x0 - <unknown>

Could not compile `rust_box2d`.

To learn more, run the command again with --verbose.

The source code is here.
The library code is in the same repository.

The only hint I have is that my previous version doesn't have this problem.

The main thing I changed between those versions is that instead of using T, TPtr<'l> and TMutPtr<'l> objects I introduced Owned<T>, Ref<'l, T> and RefMut<'l, T> objects. So probably the problem is related to these objects, which code is located at the library main file.

Edit: the project is now hosted on https://github.com/Bastacyclop/rust_box2d

[tupshin]

I just got this exact same error on the latest nightly. Only material difference was that it's now line 517 of base.rs

stack backtrace:
   1:     0x7f168dd7d240 - sys::backtrace::write::h2d5b774b42a611774sy
   2:     0x7f168dda0940 - failure::on_fail::h0eb07a9d41d28278YWF
   3:     0x7f168dd007c0 - rt::unwind::begin_unwind_inner::ha069250519e26ab8vBF
   4:     0x7f168dd012d0 - rt::unwind::begin_unwind_fmt::h9f78c298dbf494751zF
   5:     0x7f168ca1d1d0 - trans::glue::trans_struct_drop::h9466bdc3f9700c551Oe
   6:     0x7f168ca1a260 - trans::glue::trans_struct_drop_flag::h53f57a0615513e0d2Me
   7:     0x7f168ca11dd0 - trans::glue::get_drop_glue::hdbf820817aebde49RHe
   8:     0x7f168ca11ad0 - trans::glue::drop_ty::hd6a4f4d0316c3ae28De
   9:     0x7f168cb48740 - trans::cleanup::DropValue<'tcx>.Cleanup<'tcx>::trans::h3d0e4bca022963da59L
  10:     0x7f168ca25e50 - trans::cleanup::FunctionContext<'blk, 'tcx>.CleanupMethods<'blk, 'tcx>::pop_and_trans_custom_cleanup_scope::h21d0ccfe42e4e080tbL
  11:     0x7f168cad4260 - trans::base::trans_closure::hd51332b4b14ebe7dW5t
  12:     0x7f168c9f61f0 - trans::base::trans_fn::h746e9efbc2b14f5b6gu
  13:     0x7f168c9f6750 - trans::monomorphize::monomorphic_fn::h823f1e98b4e6e83aQwd
  14:     0x7f168ca36df0 - trans::callee::trans_fn_ref_with_substs::hbe01e94c86fab1c8Hyg
  15:     0x7f168ca354d0 - trans::meth::trans_static_method_callee::h09f1ec79e37540b3y0y
  16:     0x7f168ca32260 - trans::callee::trans::hbc42ee6c50b5706dvbg
  17:     0x7f168ca49bd0 - trans::callee::trans_call_inner::h9042099031439240329
  18:     0x7f168ca52290 - trans::expr::trans_rvalue_dps_unadjusted::h13e0f4c2f7eed4fbrUi
  19:     0x7f168ca516a0 - trans::expr::trans_unadjusted::hebcf330aa76000bd3li
  20:     0x7f168ca0a890 - trans::expr::trans::hd2f453f3aad5f5202Dh
  21:     0x7f168caf13c0 - trans::_match::trans_match_inner::h25d04caf88e64d1bStx
  22:     0x7f168ca52290 - trans::expr::trans_rvalue_dps_unadjusted::h13e0f4c2f7eed4fbrUi
  23:     0x7f168ca09700 - trans::expr::trans_into::hded554efed2359ffyAh
  24:     0x7f168ca08ba0 - trans::controlflow::trans_stmt_semi::hdedd5d5900214185T9d
  25:     0x7f168ca09d10 - trans::controlflow::trans_block::h7c59eb740e387008Kae
  26:     0x7f168cad4260 - trans::base::trans_closure::hd51332b4b14ebe7dW5t
  27:     0x7f168c9f61f0 - trans::base::trans_fn::h746e9efbc2b14f5b6gu
  28:     0x7f168c9f12d0 - trans::base::trans_item::h8616676269d63cd8xFu
  29:     0x7f168cadb430 - trans::base::trans_crate::he650edc239d6aefahCv
  30:     0x7f168e37cbd0 - driver::phase_4_translate_to_llvm::h7647c8286ab427432Oa
  31:     0x7f168e355a80 - driver::compile_input::hc24e252c6a9debbbCba
  32:     0x7f168e427c00 - run_compiler::h07afdfea03e574126ac
  33:     0x7f168e426290 - thunk::F.Invoke<A, R>::invoke::h7167023940119686520
  34:     0x7f168e4251c0 - rt::unwind::try::try_fn::h7099284992991867290
  35:     0x7f168de0ca80 - rust_try_inner
  36:     0x7f168de0ca70 - rust_try
  37:     0x7f168e425470 - thunk::F.Invoke<A, R>::invoke::h7565834387748213469
  38:     0x7f168dd8ce30 - sys::thread::thread_start::h7df8ddcb97714d51VCB
  39:     0x7f1687dd90c0 - start_thread
  40:     0x7f168d97cfd9 - __clone
  41:                0x0 - <unknown>

[tamird]

@tupshin how does one reproduce this? https://gitlab.com/Bastacyclop/rust_box2d at cbc7aa25707532de40e1c0f98107f2b6753346c3 no longer works with current cargo because it uses a build script written in shell, and cargo expects rust.

[Bastacyclop]

@tamird I just made a quick update for rust nightly, however I still use the workaround I found around the ICE. So if you really want to try to reproduce this, I'd say putting back the incriminated structure on top of this update should do the trick. I believe this commit sums up what you'd have to restore.

[tamird]

@Bastacyclop could you try it? This issue is pretty stale; I'm reluctant to reapply an old patch to code that has now drifted this much.

[Bastacyclop]

@tamird I can, but I'll take my time

[skade]

@Bastacyclop The source code you link to is not public/not available anymore.

[Bastacyclop]

@skade Sorry, I moved the project to github and hid the old repository, it should be fixed.

[skade]

@Bastacyclop Thank you 👍

[steveklabnik]

It's been a very long time, are you still seeing this ICE? I can't build your project as I don't have the wrapper installed.

[Bastacyclop]

@steveklabnik I rewrote the code in a different way to avoid the ICE at the time and did not look back. I don't think it's worthwhile to try to reproduce this anymore.

[steveklabnik]

Cool, let's close.

Future readers: if you can reproduce this, please let me know!