ICE unreachable!(): operand.rs #2262
Description
I tried this code:
trait Stream {
type Car;
type Cdr: Stream;
fn car(&self) -> Self::Car;
fn cdr(self) -> Self::Cdr;
}
impl Stream for () {
type Car = ();
type Cdr = ();
fn car(&self) -> () { () }
fn cdr(self) -> () { self }
}
impl<T,U> Stream for (T, U)
where T : Clone, U : Stream
{
type Car = T;
type Cdr = U;
fn car(&self) -> T { self.0.clone() }
fn cdr(self) -> U { self.1 }
}
#[kani::proof]
fn main() {
let p = (22, (44, (66, ())));
assert_eq!(p.car(), 22);
}using the following command line invocation:
kani a.rs
with Kani version: 0.22.0
I expected to see this happen: explanation
Instead, this happened: explanation
thread '<unnamed>' panicked at 'internal error: entered unreachable code', kani-compiler/src/codegen_cprover_gotoc/codegen/operand.rs:403:21
stack backtrace:
0: 0x7f9f6e4227da - std::backtrace_rs::backtrace::libunwind::trace::hc84915c67f6fb1e5
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
1: 0x7f9f6e4227da - std::backtrace_rs::backtrace::trace_unsynchronized::h74fef551999c3a2f
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7f9f6e4227da - std::sys_common::backtrace::_print_fmt::h8acfd19c1a6f1d1d
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/sys_common/backtrace.rs:65:5
3: 0x7f9f6e4227da - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h9271b09f3576b7e0
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/sys_common/backtrace.rs:44:22
4: 0x7f9f6e4852ee - core::fmt::write::h27d0bbb767cff1d5
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/core/src/fmt/mod.rs:1208:17
5: 0x7f9f6e412c65 - std::io::Write::write_fmt::hc409ea2bb818fbea
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/io/mod.rs:1682:15
6: 0x7f9f6e4225a5 - std::sys_common::backtrace::_print::hfa031a98cf1e4011
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/sys_common/backtrace.rs:47:5
7: 0x7f9f6e4225a5 - std::sys_common::backtrace::print::he69ac0980f15620d
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/sys_common/backtrace.rs:34:9
8: 0x7f9f6e4252ef - std::panicking::default_hook::{{closure}}::h014cf704a69dce2b
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/panicking.rs:267:22
9: 0x7f9f6e42502b - std::panicking::default_hook::h380e71f8d8d49df7
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/panicking.rs:286:9
10: 0x5581493aeb0d - kani_compiler::session::PANIC_HOOK::{{closure}}::{{closure}}::h10f33c4e395bf462
11: 0x558149304f67 - kani_compiler::codegen_cprover_gotoc::utils::debug::DEFAULT_HOOK::{{closure}}::{{closure}}::hf568cc16e5ffa08a
12: 0x7f9f6e425b2d - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcfa7e50330911a79
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/alloc/src/boxed.rs:2032:9
13: 0x7f9f6e425b2d - std::panicking::rust_panic_with_hook::h483f1ef90c766581
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/panicking.rs:692:13
14: 0x7f9f6e425862 - std::panicking::begin_panic_handler::{{closure}}::hd4c7d9116c0ef489
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/panicking.rs:577:13
15: 0x7f9f6e422c8c - std::sys_common::backtrace::__rust_end_short_backtrace::had27a083c7d7188b
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/sys_common/backtrace.rs:137:18
16: 0x7f9f6e4255b2 - rust_begin_unwind
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/panicking.rs:575:5
17: 0x7f9f6e481cd3 - core::panicking::panic_fmt::hbacb72817da3b060
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/core/src/panicking.rs:64:14
18: 0x7f9f6e481dad - core::panicking::panic::hbb63dcd9a5d7212e
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/core/src/panicking.rs:111:5
19: 0x5581492bdebc - kani_compiler::codegen_cprover_gotoc::codegen::operand::<impl kani_compiler::codegen_cprover_gotoc::context::goto_ctx::GotocCtx>::codegen_scalar::ha3c3a576ac17f9b2
20: 0x5581492bad73 - kani_compiler::codegen_cprover_gotoc::codegen::operand::<impl kani_compiler::codegen_cprover_gotoc::context::goto_ctx::GotocCtx>::codegen_const_value::hb556191d9d37412d
21: 0x5581492ba26d - kani_compiler::codegen_cprover_gotoc::codegen::operand::<impl kani_compiler::codegen_cprover_gotoc::context::goto_ctx::GotocCtx>::codegen_operand::hd73dcdb6f0cd0ad9
22: 0x5581492c8b0b - kani_compiler::codegen_cprover_gotoc::codegen::rvalue::<impl kani_compiler::codegen_cprover_gotoc::context::goto_ctx::GotocCtx>::codegen_rvalue::h57a2cf71297ecf62
23: 0x5581492d8080 - kani_compiler::codegen_cprover_gotoc::codegen::statement::<impl kani_compiler::codegen_cprover_gotoc::context::goto_ctx::GotocCtx>::codegen_statement::h4c6e1c8bf226a338
24: 0x55814927f0d1 - kani_compiler::codegen_cprover_gotoc::codegen::function::<impl kani_compiler::codegen_cprover_gotoc::context::goto_ctx::GotocCtx>::codegen_function::h541ea7f90d847b35
25: 0x55814930abf0 - std::thread::local::LocalKey<T>::with::hb907a536239d23f6
26: 0x5581493964c8 - <kani_compiler::codegen_cprover_gotoc::compiler_interface::GotocCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate::heaa499391d53b3f6
27: 0x7f9f6c486fa1 - <rustc_session[19dfb3d05ff8562d]::session::Session>::time::<alloc[58cfa59ca61fafa9]::boxed::Box<dyn core[6d94cc961ac87456]::any::Any>, rustc_interface[aec886e93b1add3f]::passes::start_codegen::{closure#0}>
28: 0x7f9f6c486ac9 - rustc_interface[aec886e93b1add3f]::passes::start_codegen
29: 0x7f9f6c4847a6 - <rustc_interface[aec886e93b1add3f]::passes::QueryContext>::enter::<<rustc_interface[aec886e93b1add3f]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core[6d94cc961ac87456]::result::Result<alloc[58cfa59ca61fafa9]::boxed::Box<dyn core[6d94cc961ac87456]::any::Any>, rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>>
30: 0x7f9f6c481a46 - <rustc_interface[aec886e93b1add3f]::queries::Queries>::ongoing_codegen
31: 0x7f9f6c480f67 - <rustc_interface[aec886e93b1add3f]::interface::Compiler>::enter::<rustc_driver[94a2f0241de75afa]::run_compiler::{closure#1}::{closure#2}, core[6d94cc961ac87456]::result::Result<core[6d94cc961ac87456]::option::Option<rustc_interface[aec886e93b1add3f]::queries::Linker>, rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>>
32: 0x7f9f6c47bf88 - rustc_span[ae2df7aa7c6c667b]::with_source_map::<core[6d94cc961ac87456]::result::Result<(), rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>, rustc_interface[aec886e93b1add3f]::interface::run_compiler<core[6d94cc961ac87456]::result::Result<(), rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>, rustc_driver[94a2f0241de75afa]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
33: 0x7f9f6c47ba75 - <scoped_tls[db87656d258d017b]::ScopedKey<rustc_span[ae2df7aa7c6c667b]::SessionGlobals>>::set::<rustc_interface[aec886e93b1add3f]::interface::run_compiler<core[6d94cc961ac87456]::result::Result<(), rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>, rustc_driver[94a2f0241de75afa]::run_compiler::{closure#1}>::{closure#0}, core[6d94cc961ac87456]::result::Result<(), rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>>
34: 0x7f9f6c47b062 - std[acd1f573e90225f]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[aec886e93b1add3f]::util::run_in_thread_pool_with_globals<rustc_interface[aec886e93b1add3f]::interface::run_compiler<core[6d94cc961ac87456]::result::Result<(), rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>, rustc_driver[94a2f0241de75afa]::run_compiler::{closure#1}>::{closure#0}, core[6d94cc961ac87456]::result::Result<(), rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[6d94cc961ac87456]::result::Result<(), rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>>
35: 0x7f9f6caec49e - <<std[acd1f573e90225f]::thread::Builder>::spawn_unchecked_<rustc_interface[aec886e93b1add3f]::util::run_in_thread_pool_with_globals<rustc_interface[aec886e93b1add3f]::interface::run_compiler<core[6d94cc961ac87456]::result::Result<(), rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>, rustc_driver[94a2f0241de75afa]::run_compiler::{closure#1}>::{closure#0}, core[6d94cc961ac87456]::result::Result<(), rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[6d94cc961ac87456]::result::Result<(), rustc_errors[56887b15c7ec6fbf]::ErrorGuaranteed>>::{closure#1} as core[6d94cc961ac87456]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
36: 0x7f9f6dfda2d3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::he955d3e33f115328
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/alloc/src/boxed.rs:2000:9
37: 0x7f9f6dfda2d3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h32515d9eaa012a19
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/alloc/src/boxed.rs:2000:9
38: 0x7f9f6dfda2d3 - std::sys::unix::thread::Thread::new::thread_start::h5af9cdd9a5a58d64
at /rustc/c6fcdb690609769a240fc8ab0de0ce68d5ea7dba/library/std/src/sys/unix/thread.rs:108:17
39: 0x7f9f69d91bb5 - <unknown>
40: 0x7f9f69e13d90 - <unknown>
41: 0x0 - <unknown>
Kani unexpectedly panicked during compilation.
Please file an issue here: https://github.com/model-checking/kani/issues/new?labels=bug&template=bug_report.md
[Kani] current codegen item: codegen_function: main
main
[Kani] current codegen location: Loc { file: "/home/matthias/vcs/github/icemaker/kani/a.rs", function: None, start_line: 26, start_col: Some(1), end_line: 26, end_col: Some(10) }
error: /home/matthias/.kani/kani-0.22.0/bin/kani-compiler exited with status exit status: 101