[INFO] cloning repository https://github.com/vernonrj/MIPSical
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vernonrj/MIPSical" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvernonrj%2FMIPSical", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvernonrj%2FMIPSical'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7838ffd302ac7db5ed8eb21f0bb74b82f1ae3e31
[INFO] checking vernonrj/MIPSical against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvernonrj%2FMIPSical" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vernonrj/MIPSical on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vernonrj/MIPSical
[INFO] finished tweaking git repo https://github.com/vernonrj/MIPSical
[INFO] tweaked toml for git repo https://github.com/vernonrj/MIPSical written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/vernonrj/MIPSical already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded memchr v0.1.10
[INFO] [stderr]   Downloaded env_logger v0.3.2
[INFO] [stderr]   Downloaded regex v0.1.55
[INFO] [stderr]   Downloaded regex-syntax v0.2.5
[INFO] [stderr]   Downloaded quickcheck v0.2.25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb1e18d29b1f2a2aa59973b8eb13d77086287af2ddf2eb9967da47d62e6b566c
[INFO] running `Command { std: "docker" "start" "-a" "eb1e18d29b1f2a2aa59973b8eb13d77086287af2ddf2eb9967da47d62e6b566c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb1e18d29b1f2a2aa59973b8eb13d77086287af2ddf2eb9967da47d62e6b566c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb1e18d29b1f2a2aa59973b8eb13d77086287af2ddf2eb9967da47d62e6b566c", kill_on_drop: false }`
[INFO] [stdout] eb1e18d29b1f2a2aa59973b8eb13d77086287af2ddf2eb9967da47d62e6b566c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f16e5353c4f1cb72a4ec0d96521a4b7a8f714a9d0a32dfa02f56665c57a8f3b1
[INFO] running `Command { std: "docker" "start" "-a" "f16e5353c4f1cb72a4ec0d96521a4b7a8f714a9d0a32dfa02f56665c57a8f3b1", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.7
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.2.5
[INFO] [stderr]     Checking mips v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decoder.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub execute: Box<Fn(&Vec<u32>) -> ExecResult<u32>>,
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Vec<u32>) -> ExecResult<u32>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decoder.rs:23:27
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub branch_taken: Box<Fn(&Vec<u32>) -> bool>,
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Vec<u32>) -> bool`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/instruction/add.rs:14:6
[INFO] [stdout]    |
[INFO] [stdout] 14 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error::ExecResult`
[INFO] [stdout]  --> src/instruction/branch.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use error::ExecResult;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error.rs:23:16
[INFO] [stdout]    |
[INFO] [stdout] 23 |     error: Box<error::Error + Send + Sync>,
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + Send + Sync`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error.rs:28:27
[INFO] [stdout]    |
[INFO] [stdout] 28 |         where E: Into<Box<error::Error + Send + Sync>>
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + Send + Sync`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Normal`
[INFO] [stdout]  --> src/decoded.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Normal(u8),
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Special`
[INFO] [stdout]  --> src/decoded.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Special(u8),
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RegImm`
[INFO] [stdout]  --> src/decoded.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     RegImm(u8),
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Register`
[INFO] [stdout]   --> src/decoded.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Register(pub u8);
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RS`
[INFO] [stdout]   --> src/decoder.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     RS,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RT`
[INFO] [stdout]   --> src/decoder.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     RT,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RD`
[INFO] [stdout]   --> src/decoder.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     RD,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SA`
[INFO] [stdout]   --> src/decoder.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     SA,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Immediate`
[INFO] [stdout]   --> src/decoder.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Immediate,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Decoder`
[INFO] [stdout]   --> src/decoder.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub struct Decoder {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/decoder.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `decode`
[INFO] [stdout]   --> src/decoder.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn decode(&self, command: Fetched) -> Option<&Instruction> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `keys`
[INFO] [stdout]   --> src/decoder.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn keys(&self) -> Vec<Opcode> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Fetched`
[INFO] [stdout]   --> src/decoder.rs:73:12
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub struct Fetched(pub u32);
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `extract_31_26`
[INFO] [stdout]   --> src/decoder.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn extract_31_26(bitfield: u32) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `extract_25_21`
[INFO] [stdout]   --> src/decoder.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub fn extract_25_21(bitfield: u32) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `extract_20_16`
[INFO] [stdout]   --> src/decoder.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub fn extract_20_16(bitfield: u32) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `extract_15_11`
[INFO] [stdout]   --> src/decoder.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub fn extract_15_11(bitfield: u32) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `extract_15_0`
[INFO] [stdout]   --> src/decoder.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 | pub fn extract_15_0(bitfield: u32) -> u16 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `extract_10_6`
[INFO] [stdout]   --> src/decoder.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn extract_10_6(bitfield: u32) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `extract_5_0`
[INFO] [stdout]   --> src/decoder.rs:93:8
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub fn extract_5_0(bitfield: u32) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `extract_25_0`
[INFO] [stdout]   --> src/decoder.rs:96:8
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub fn extract_25_0(bitfield: u32) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `register`
[INFO] [stdout]  --> src/instruction/add.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn register(m: &mut HashMap<Opcode, Instruction>) {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `register`
[INFO] [stdout]  --> src/instruction/and.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn register(m: &mut HashMap<Opcode, Instruction>) {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `register`
[INFO] [stdout]  --> src/instruction/branch.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn register(m: &mut HashMap<Opcode, Instruction>) {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `register`
[INFO] [stdout]  --> src/instruction/shift.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn register(m: &mut HashMap<Opcode, Instruction>) {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Success`
[INFO] [stdout]  --> src/error.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Success(T),
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Exception`
[INFO] [stdout]  --> src/error.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Exception(ExecError),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unwrap`
[INFO] [stdout]   --> src/error.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn unwrap(self) -> T {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/error.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn new<E>(kind: ErrorKind, error: E) -> Self
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Overflow`
[INFO] [stdout]   --> src/error.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |     Overflow,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking memchr v0.1.10
[INFO] [stderr]     Checking log v0.3.5
[INFO] [stderr]     Checking rand v0.3.14
[INFO] [stderr]     Checking aho-corasick v0.5.1
[INFO] [stderr]     Checking regex v0.1.55
[INFO] [stderr]     Checking env_logger v0.3.2
[INFO] [stderr]     Checking quickcheck v0.2.25
[INFO] [stdout] error: Trailing semicolon in macro
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/quickcheck-0.2.25/src/tester.rs:115:27
[INFO] [stdout]     |
[INFO] [stdout] 115 |             Ok(ntests) => info!("(Passed {} QuickCheck tests.)", ntests),
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `info` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `quickcheck`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "f16e5353c4f1cb72a4ec0d96521a4b7a8f714a9d0a32dfa02f56665c57a8f3b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f16e5353c4f1cb72a4ec0d96521a4b7a8f714a9d0a32dfa02f56665c57a8f3b1", kill_on_drop: false }`
[INFO] [stdout] f16e5353c4f1cb72a4ec0d96521a4b7a8f714a9d0a32dfa02f56665c57a8f3b1