Rust: thread 'rustc' panicked at 'index out of bounds: the len is 0 but the index is 43

[int3rsys]

Code

use std::io::{Read, Write};
use std::fmt::Debug;
use std::io::{stdout,stdin, BufRead};
use arrayvec::ArrayString;
use std::vec::Vec;
use std::convert::TryInto;

struct VM {
    r: [u32;16],
    pc: u32,
    mem: Vec<u8>,
}

impl VM{

    fn check_instr(&mut self)-> bool{
        self.pc += 1;
        let idx = self.pc as usize;
        match self.mem[idx]{
            0x00 => {
                self.r[self.mem[idx+1] as usize] ^= self.r[self.mem[idx+2] as usize];
                self.pc += 3;
                return false;
            }, //xor det_reg,src_reg
            0x01 => {
                self.r[self.mem[idx+1] as usize] &= self.r[self.mem[idx+2] as usize];
                self.pc += 3;
                return false;
            },
            0x02 => {
                self.r[self.mem[idx+1] as usize] |= self.r[self.mem[idx+2] as usize];
                self.pc += 3;
                return false;
            },
            // MOV dst_reg, std_reg
            0x11 =>{
                let idx = self.pc as usize;
                let data = self.mem[idx+1];
                self.mem[idx+2].clone_from(&data);
                self.pc += 6;
                return false;
            },
            // MOV dst_reg, imm32
            0x10 =>{
                let idx = self.pc as usize;
                let data = self.mem[idx+1] as u32;
                self.r[self.mem[idx+2] as usize].clone_from(&data);
                self.pc += 3;
                return false;
            },
            0xff =>{
                return true;
            }
            _ => return false,
        }
        println!("Should never get here!");
        return true;
    }

    fn check(&mut self, key: &[u8;16]) -> bool{
        key.chunks_exact(4)
            .take(4)
            .zip(&mut self.r[..4])
            .for_each(|(chunk,slot)| * slot = u32::from_le_bytes(chunk.try_into().unwrap()));

        let mut end = false;

        while !end {
            end = self.check_instr();
        }
        return self.r[0] == 0;
    }
}

fn main() {
    const MAX_SIZE: u64 = 256;
    let key_valid = false;
    let mut key = [0;16];

    println!("Hello there\nPlease enter your key: ");
    let _ = stdout().flush();
    if let Err(_) = stdin().read_exact(&mut key){
        println!("Bad user input!");
    }

    // let mut vm = VM::new();
    // let key_valid = vm.check(key);

    if (key_valid){
        println!("Yup.");
    }else{
        println!("Nope.");
    }
}

rustc --version --verbose:

rustc 1.45.0 (5c1f21c3b 2020-07-13)
binary: rustc
commit-hash: 5c1f21c3b82297671ad3ae1e8c942d2ca92e84f2
commit-date: 2020-07-13
host: x86_64-unknown-linux-gnu
release: 1.45.0
LLVM version: 10.0

Error output

thread 'rustc' panicked at 'index out of bounds: the len is 0 but the index is 43', /rustc/5c1f21c3b82297671ad3ae1e8c942d2ca92e84f2/src/librustc_query_system/dep_graph/serialized.rs:42:23
stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
   1: backtrace::backtrace::trace_unsynchronized
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print_fmt
             at src/libstd/sys_common/backtrace.rs:78
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
             at src/libstd/sys_common/backtrace.rs:59
   4: core::fmt::write
             at src/libcore/fmt/mod.rs:1076
   5: std::io::Write::write_fmt
             at src/libstd/io/mod.rs:1537
   6: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:62
   7: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:49
   8: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:198
   9: std::panicking::default_hook
             at src/libstd/panicking.rs:218
  10: rustc_driver::report_ice
  11: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:490
  12: rust_begin_unwind
             at src/libstd/panicking.rs:388
  13: core::panicking::panic_fmt
             at src/libcore/panicking.rs:101
  14: core::panicking::panic_bounds_check
             at src/libcore/panicking.rs:73
  15: rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_previous_green
  16: rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_green_and_read
  17: rustc_data_structures::stack::ensure_sufficient_stack
  18: rustc_query_system::query::plumbing::get_query_impl
  19: rustc_passes::entry::find_entry_point
  20: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
  21: rustc_session::utils::<impl rustc_session::session::Session>::time
  22: rustc_interface::passes::analysis
  23: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::analysis>::compute
  24: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  25: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  26: rustc_query_system::query::plumbing::get_query_impl
  27: rustc_middle::ty::context::tls::enter_global
  28: rustc_interface::interface::run_compiler_in_existing_thread_pool
  29: rustc_ast::attr::with_globals
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: internal compiler error: unexpected panic

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 1.45.0 (5c1f21c3b 2020-07-13) running on x86_64-unknown-linux-gnu

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type bin

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

query stack during panic:
#0 [entry_fn] looking up the entry function of a crate
#1 [analysis] running analysis passes on this crate
end of query stack
thread 'rustc' panicked at 'index out of bounds: the len is 0 but the index is 46', /rustc/5c1f21c3b82297671ad3ae1e8c942d2ca92e84f2/src/librustc_query_system/dep_graph/serialized.rs:42:23
stack backtrace:
0: backtrace::backtrace::libunwind::trace
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
   1: backtrace::backtrace::trace_unsynchronized
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print_fmt
             at src/libstd/sys_common/backtrace.rs:78
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
             at src/libstd/sys_common/backtrace.rs:59
   4: core::fmt::write
             at src/libcore/fmt/mod.rs:1076
   5: std::io::Write::write_fmt
             at src/libstd/io/mod.rs:1537
   6: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:62
   7: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:49
   8: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:198
   9: std::panicking::default_hook
             at src/libstd/panicking.rs:218
  10: rustc_driver::report_ice
  11: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:490
  12: rust_begin_unwind
             at src/libstd/panicking.rs:388
  13: core::panicking::panic_fmt
             at src/libcore/panicking.rs:101
  14: core::panicking::panic_bounds_check
             at src/libcore/panicking.rs:73
  15: rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_previous_green
  16: rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_green_and_read
  17: rustc_query_system::query::plumbing::ensure_query_impl
  18: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
  19: rustc_session::utils::<impl rustc_session::session::Session>::time
  20: rustc_interface::passes::analysis
  21: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::analysis>::compute
  22: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  23: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  24: rustc_query_system::query::plumbing::get_query_impl
  25: rustc_middle::ty::context::tls::enter_global
  26: rustc_interface::interface::run_compiler_in_existing_thread_pool
  27: rustc_ast::attr::with_globals
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: internal compiler error: unexpected panic

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 1.45.0 (5c1f21c3b 2020-07-13) running on x86_64-unknown-linux-gnu

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type bin

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

query stack during panic:
#0 [analysis] running analysis passes on this crate
end of query stack
warning: 4 warnings emitted

error: could not compile `VM`.

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

Process finished with exit code 101

Backtrace

stack trace is included above

[bugadani]

Seems to compile fine on godbolt.org (sans the removed use arrayvec::ArrayString;). What settings did you use?

[int3rsys]

Seems to compile fine on godbolt.org (sans the removed use arrayvec::ArrayString;). What settings did you use?

Hi! my settings:

[package]
name = "VM"
version = "0.1.0"
authors = ["intersys"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
arrayvec = "0.5.1"

[lzutao]

Please retry on newest stable and nightly toolchain.

Edit: Cannot reproduce on playground with stable and nightly toolchain: https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=c9aa65afb868046ae8529a15a5a6e0b0.

[SNCPlay42]

src/librustc_query_system/dep_graph/serialized.rs:42:23

This looks incremental-compilation related. Searching thread 'rustc' panicked at 'index out of bounds' gives a whole bunch of similar issues, which are probably duplicates of each other.

[int3rsys]

Please retry on newest stable and nightly toolchain.

Edit: Cannot reproduce on playground with stable and nightly toolchain: https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=c9aa65afb868046ae8529a15a5a6e0b0.

I believe a have a problem with my system. That happens when I try to update rust:

intersys@intersys-VirtualBox:~$ rustup toolchain install nightly
info: syncing channel updates for 'nightly-x86_64-unknown-linux-gnu'
info: latest update on 2020-10-17, rust version 1.49.0-nightly (e3051d8c2 2020-10-16)
info: downloading component 'cargo'
error: component download failed for cargo-x86_64-unknown-linux-gnu
error: caused by: checksum failed
intersys@intersys-VirtualBox:~$ rustup update
info: no updatable toolchains installed
info: checking for self-updates
info: cleaning up downloads & tmp directories
intersys@intersys-VirtualBox:~$ rustup update
info: no updatable toolchains installed
info: checking for self-updates
info: cleaning up downloads & tmp directories
intersys@intersys-VirtualBox:~$ rustup update
info: no updatable toolchains installed
info: checking for self-updates
info: cleaning up downloads & tmp directories
intersys@intersys-VirtualBox:~$ rustup toolchain install stable
info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
info: latest update on 2020-10-08, rust version 1.47.0 (18bf6b4f0 2020-10-07)
info: downloading component 'cargo'
error: component download failed for cargo-x86_64-unknown-linux-gnu
error: caused by: checksum failed