[INFO] cloning repository https://github.com/medelman17/language-virtual-machine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/medelman17/language-virtual-machine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmedelman17%2Flanguage-virtual-machine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmedelman17%2Flanguage-virtual-machine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d7e96f1fd32cf05e4809750c4f4ec3a3a599c6bc
[INFO] checking medelman17/language-virtual-machine against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmedelman17%2Flanguage-virtual-machine" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/medelman17/language-virtual-machine on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/medelman17/language-virtual-machine
[INFO] finished tweaking git repo https://github.com/medelman17/language-virtual-machine
[INFO] tweaked toml for git repo https://github.com/medelman17/language-virtual-machine written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/medelman17/language-virtual-machine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 69f16b0b40247909aa0f6a8b7a0967364bf5f7235012ccc42496795d069af96c
[INFO] running `Command { std: "docker" "start" "-a" "69f16b0b40247909aa0f6a8b7a0967364bf5f7235012ccc42496795d069af96c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "69f16b0b40247909aa0f6a8b7a0967364bf5f7235012ccc42496795d069af96c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69f16b0b40247909aa0f6a8b7a0967364bf5f7235012ccc42496795d069af96c", kill_on_drop: false }`
[INFO] [stdout] 69f16b0b40247909aa0f6a8b7a0967364bf5f7235012ccc42496795d069af96c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3091bd2d817e6e610e55dd8761f3b9af51f07766c60e03615a78e803a5dd4c3
[INFO] running `Command { std: "docker" "start" "-a" "e3091bd2d817e6e610e55dd8761f3b9af51f07766c60e03615a78e803a5dd4c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling serde_json v1.0.69
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stderr]     Checking iridium v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `multispace` is imported redundantly
[INFO] [stdout]   --> src/assembler/instruction_parsers.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use nom::multispace;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 11 | use nom::types::CompleteStr;
[INFO] [stdout] 12 | use nom::*;
[INFO] [stdout]    |     ------ the item `multispace` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/repl/mod.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/vm.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `num_cpus` is imported redundantly
[INFO] [stdout]  --> src/vm.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use num_cpus;
[INFO] [stdout]   |     ^^^^^^^^ the item `num_cpus` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `buf` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub struct Assembler {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 48 |     buf: [u8; 4],
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Assembler` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `symbol_type` is never read
[INFO] [stdout]   --> src/assembler/symbols.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub struct Symbol {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 48 |     symbol_type: SymbolType,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Symbol` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `at` and `application_id` are never read
[INFO] [stdout]   --> src/vm.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub struct VMEvent {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 41 |     pub event: VMEventType,
[INFO] [stdout] 42 |     at: DateTime<Utc>,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 43 |     application_id: Uuid,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `VMEvent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CompleteStr` is imported redundantly
[INFO] [stdout]   --> src/assembler/directive_parsers.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     use super::*;
[INFO] [stdout]    |         -------- the item `CompleteStr` is already imported here
[INFO] [stdout] 58 |     use nom::types::CompleteStr;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `multispace` is imported redundantly
[INFO] [stdout]   --> src/assembler/instruction_parsers.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use nom::multispace;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 11 | use nom::types::CompleteStr;
[INFO] [stdout] 12 | use nom::*;
[INFO] [stdout]    |     ------ the item `multispace` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Symbol` is imported redundantly
[INFO] [stdout]    --> src/assembler/mod.rs:353:37
[INFO] [stdout]     |
[INFO] [stdout] 352 |     use super::*;
[INFO] [stdout]     |         -------- the item `Symbol` is already imported here
[INFO] [stdout] 353 |     use crate::assembler::symbols::{Symbol, SymbolTable, SymbolType};
[INFO] [stdout]     |                                     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SymbolTable` is imported redundantly
[INFO] [stdout]    --> src/assembler/mod.rs:353:45
[INFO] [stdout]     |
[INFO] [stdout] 352 |     use super::*;
[INFO] [stdout]     |         -------- the item `SymbolTable` is already imported here
[INFO] [stdout] 353 |     use crate::assembler::symbols::{Symbol, SymbolTable, SymbolType};
[INFO] [stdout]     |                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SymbolType` is imported redundantly
[INFO] [stdout]    --> src/assembler/mod.rs:353:58
[INFO] [stdout]     |
[INFO] [stdout] 352 |     use super::*;
[INFO] [stdout]     |         -------- the item `SymbolType` is already imported here
[INFO] [stdout] 353 |     use crate::assembler::symbols::{Symbol, SymbolTable, SymbolType};
[INFO] [stdout]     |                                                          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CompleteStr` is imported redundantly
[INFO] [stdout]    --> src/instruction.rs:116:9
[INFO] [stdout]     |
[INFO] [stdout] 115 |     use super::*;
[INFO] [stdout]     |         -------- the item `CompleteStr` is already imported here
[INFO] [stdout] 116 |     use nom::types::CompleteStr;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/repl/mod.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/vm.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `num_cpus` is imported redundantly
[INFO] [stdout]  --> src/vm.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use num_cpus;
[INFO] [stdout]   |     ^^^^^^^^ the item `num_cpus` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `buf` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub struct Assembler {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 48 |     buf: [u8; 4],
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Assembler` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `symbol_type` is never read
[INFO] [stdout]   --> src/assembler/symbols.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub struct Symbol {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 48 |     symbol_type: SymbolType,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Symbol` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `at` and `application_id` are never read
[INFO] [stdout]   --> src/vm.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub struct VMEvent {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 41 |     pub event: VMEventType,
[INFO] [stdout] 42 |     at: DateTime<Utc>,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 43 |     application_id: Uuid,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `VMEvent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.13s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.5, nom v4.2.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4`
[INFO] running `Command { std: "docker" "inspect" "e3091bd2d817e6e610e55dd8761f3b9af51f07766c60e03615a78e803a5dd4c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3091bd2d817e6e610e55dd8761f3b9af51f07766c60e03615a78e803a5dd4c3", kill_on_drop: false }`
[INFO] [stdout] e3091bd2d817e6e610e55dd8761f3b9af51f07766c60e03615a78e803a5dd4c3