I tried this code:
fn main() {
let slice = &[1, 2, 3][..];
if let [head, tail @ ..] = slice {
assert!(head == &slice[0]);
assert!(tail == &slice[1..]);
} else {
unreachable!();
}
}
using the following command line invocation:
with RMC version: 6962a67
I expected to see this happen: verification succeeds.
Instead, this happened: RMC panics with the following error:
thread 'rustc' panicked at 'not implemented', compiler/rustc_codegen_llvm/src/gotoc/place.rs:352:48
stack backtrace:
0: rust_begin_unwind
at ./library/std/src/panicking.rs:515:5
1: core::panicking::panic_fmt
at ./library/core/src/panicking.rs:92:14
2: core::panicking::panic
at ./library/core/src/panicking.rs:50:5
3: rustc_codegen_llvm::gotoc::place::<impl rustc_codegen_llvm::gotoc::metadata::GotocCtx>::codegen_projection
at ./compiler/rustc_codegen_llvm/src/gotoc/place.rs:352:48
4: rustc_codegen_llvm::gotoc::place::<impl rustc_codegen_llvm::gotoc::metadata::GotocCtx>::codegen_place::{{closure}}
at ./compiler/rustc_codegen_llvm/src/gotoc/place.rs:400:53
5: core::iter::adapters::copied::copy_fold::{{closure}}
at ./library/core/src/iter/adapters/copied.rs:26:22
6: core::iter::traits::iterator::Iterator::fold
at ./library/core/src/iter/traits/iterator.rs:2173:21
7: <core::iter::adapters::copied::Copied<I> as core::iter::traits::iterator::Iterator>::fold
at ./library/core/src/iter/adapters/copied.rs:62:9
8: rustc_codegen_llvm::gotoc::place::<impl rustc_codegen_llvm::gotoc::metadata::GotocCtx>::codegen_place
at ./compiler/rustc_codegen_llvm/src/gotoc/place.rs:398:9
9: rustc_codegen_llvm::gotoc::rvalue::<impl rustc_codegen_llvm::gotoc::metadata::GotocCtx>::codegen_rvalue_ref
at ./compiler/rustc_codegen_llvm/src/gotoc/rvalue.rs:105:26
10: rustc_codegen_llvm::gotoc::rvalue::<impl rustc_codegen_llvm::gotoc::metadata::GotocCtx>::codegen_rvalue
at ./compiler/rustc_codegen_llvm/src/gotoc/rvalue.rs:386:63
11: rustc_codegen_llvm::gotoc::statement::<impl rustc_codegen_llvm::gotoc::metadata::GotocCtx>::codegen_statement
at ./compiler/rustc_codegen_llvm/src/gotoc/statement.rs:462:60
12: rustc_codegen_llvm::gotoc::<impl rustc_codegen_llvm::gotoc::metadata::GotocCtx>::codegen_block
at ./compiler/rustc_codegen_llvm/src/gotoc/mod.rs:124:32
13: rustc_codegen_llvm::gotoc::<impl rustc_codegen_llvm::gotoc::metadata::GotocCtx>::codegen_function::{{closure}}
at ./compiler/rustc_codegen_llvm/src/gotoc/mod.rs:207:71
14: core::iter::traits::iterator::Iterator::for_each::call::{{closure}}
at ./library/core/src/iter/traits/iterator.rs:733:29
15: core::iter::adapters::map::map_fold::{{closure}}
at ./library/core/src/iter/adapters/map.rs:82:21
16: <core::iter::adapters::enumerate::Enumerate<I> as core::iter::traits::iterator::Iterator>::fold::enumerate::{{closure}}
at ./library/core/src/iter/adapters/enumerate.rs:104:27
17: core::iter::traits::iterator::Iterator::fold
at ./library/core/src/iter/traits/iterator.rs:2173:21
18: <core::iter::adapters::enumerate::Enumerate<I> as core::iter::traits::iterator::Iterator>::fold
at ./library/core/src/iter/adapters/enumerate.rs:110:9
19: <core::iter::adapters::map::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
at ./library/core/src/iter/adapters/map.rs:122:9
20: core::iter::traits::iterator::Iterator::for_each
at ./library/core/src/iter/traits/iterator.rs:736:9
21: rustc_codegen_llvm::gotoc::<impl rustc_codegen_llvm::gotoc::metadata::GotocCtx>::codegen_function
at ./compiler/rustc_codegen_llvm/src/gotoc/mod.rs:207:13
22: <rustc_codegen_llvm::gotoc::GotocCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate::{{closure}}
at ./compiler/rustc_codegen_llvm/src/gotoc/mod.rs:393:35
23: rustc_codegen_llvm::gotoc::<impl rustc_codegen_llvm::gotoc::metadata::GotocCtx>::call_with_panic_debug_info::{{closure}}
at ./compiler/rustc_codegen_llvm/src/gotoc/mod.rs:103:13
24: std::thread::local::LocalKey<T>::try_with
at ./library/std/src/thread/local.rs:399:16
25: std::thread::local::LocalKey<T>::with
at ./library/std/src/thread/local.rs:375:9
26: rustc_codegen_llvm::gotoc::<impl rustc_codegen_llvm::gotoc::metadata::GotocCtx>::call_with_panic_debug_info
at ./compiler/rustc_codegen_llvm/src/gotoc/mod.rs:101:9
27: <rustc_codegen_llvm::gotoc::GotocCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
at ./compiler/rustc_codegen_llvm/src/gotoc/mod.rs:392:25
28: rustc_interface::passes::start_codegen::{{closure}}
at ./compiler/rustc_interface/src/passes.rs:1054:9
29: rustc_data_structures::profiling::VerboseTimingGuard::run
at ./compiler/rustc_data_structures/src/profiling.rs:573:9
30: rustc_session::utils::<impl rustc_session::session::Session>::time
at ./compiler/rustc_session/src/utils.rs:16:9
31: rustc_interface::passes::start_codegen
at ./compiler/rustc_interface/src/passes.rs:1053:19
32: rustc_interface::queries::Queries::ongoing_codegen::{{closure}}::{{closure}}
at ./compiler/rustc_interface/src/queries.rs:254:20
33: rustc_interface::passes::QueryContext::enter::{{closure}}
at ./compiler/rustc_interface/src/passes.rs:780:42
34: rustc_middle::ty::context::tls::enter_context::{{closure}}
at ./compiler/rustc_middle/src/ty/context.rs:1744:50
35: rustc_middle::ty::context::tls::set_tlv
at ./compiler/rustc_middle/src/ty/context.rs:1728:9
36: rustc_middle::ty::context::tls::enter_context
at ./compiler/rustc_middle/src/ty/context.rs:1744:9
37: rustc_interface::passes::QueryContext::enter
at ./compiler/rustc_interface/src/passes.rs:780:9
38: rustc_interface::queries::Queries::ongoing_codegen::{{closure}}
at ./compiler/rustc_interface/src/queries.rs:245:13
39: rustc_interface::queries::Query<T>::compute
at ./compiler/rustc_interface/src/queries.rs:38:28
40: rustc_interface::queries::Queries::ongoing_codegen
at ./compiler/rustc_interface/src/queries.rs:243:9
41: rustc_driver::run_compiler::{{closure}}::{{closure}}
at ./compiler/rustc_driver/src/lib.rs:407:13
42: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
at ./compiler/rustc_interface/src/queries.rs:394:19
43: rustc_driver::run_compiler::{{closure}}
at ./compiler/rustc_driver/src/lib.rs:312:22
44: rustc_interface::interface::create_compiler_and_run::{{closure}}
at ./compiler/rustc_interface/src/interface.rs:208:13
45: rustc_span::with_source_map
at ./compiler/rustc_span/src/lib.rs:911:5
46: rustc_interface::interface::create_compiler_and_run
at ./compiler/rustc_interface/src/interface.rs:202:5
47: rustc_interface::interface::run_compiler::{{closure}}
at ./compiler/rustc_interface/src/interface.rs:224:12
48: rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals::{{closure}}::{{closure}}
at ./compiler/rustc_interface/src/util.rs:155:13
49: scoped_tls::ScopedKey<T>::set
at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped-tls-1.0.0/src/lib.rs:137:9
50: rustc_span::create_session_globals_then
at ./compiler/rustc_span/src/lib.rs:105:5
51: rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals::{{closure}}
at ./compiler/rustc_interface/src/util.rs:153:9
52: rustc_interface::util::scoped_thread::{{closure}}
at ./compiler/rustc_interface/src/util.rs:128:24
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