[INFO] updating cached repository vernonrj/MIPSical
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vernonrj/MIPSical
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vernonrj/MIPSical" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/vernonrj/MIPSical"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/vernonrj/MIPSical'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vernonrj/MIPSical" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/vernonrj/MIPSical"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/vernonrj/MIPSical'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7838ffd302ac7db5ed8eb21f0bb74b82f1ae3e31
[INFO] sha for GitHub repo vernonrj/MIPSical: 7838ffd302ac7db5ed8eb21f0bb74b82f1ae3e31
[INFO] validating manifest of vernonrj/MIPSical on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of vernonrj/MIPSical on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing vernonrj/MIPSical
[INFO] finished frobbing vernonrj/MIPSical
[INFO] frobbed toml for vernonrj/MIPSical written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/vernonrj/MIPSical/Cargo.toml
[INFO] started frobbing vernonrj/MIPSical
[INFO] finished frobbing vernonrj/MIPSical
[INFO] frobbed toml for vernonrj/MIPSical written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/vernonrj/MIPSical/Cargo.toml
[INFO] crate vernonrj/MIPSical already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/vernonrj/MIPSical/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking vernonrj/MIPSical against master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-4/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/vernonrj/MIPSical:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 15bd38a87edc4fef85c171a48d4e755286340e07d1b6ab9aff83d65638621c47
[INFO] running `"docker" "start" "-a" "15bd38a87edc4fef85c171a48d4e755286340e07d1b6ab9aff83d65638621c47"`
[INFO] [stderr]     Checking mips v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Checking quickcheck v0.2.27
[INFO] [stderr] warning: unused import: `error::ExecResult`
[INFO] [stderr]  --> src/instruction/branch.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use error::ExecResult;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Normal`
[INFO] [stderr]  --> src/decoded.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Normal(u8),
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Special`
[INFO] [stderr]  --> src/decoded.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Special(u8),
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RegImm`
[INFO] [stderr]  --> src/decoded.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     RegImm(u8),
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Register`
[INFO] [stderr]   --> src/decoded.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub struct Register(pub u8);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RS`
[INFO] [stderr]   --> src/decoder.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     RS,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RT`
[INFO] [stderr]   --> src/decoder.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     RT,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RD`
[INFO] [stderr]   --> src/decoder.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     RD,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SA`
[INFO] [stderr]   --> src/decoder.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     SA,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Immediate`
[INFO] [stderr]   --> src/decoder.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     Immediate,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Decoder`
[INFO] [stderr]   --> src/decoder.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub struct Decoder {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/decoder.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `decode`
[INFO] [stderr]   --> src/decoder.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn decode(&self, command: Fetched) -> Option<&Instruction> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `keys`
[INFO] [stderr]   --> src/decoder.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     pub fn keys(&self) -> Vec<Opcode> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Fetched`
[INFO] [stderr]   --> src/decoder.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | pub struct Fetched(pub u32);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `extract_31_26`
[INFO] [stderr]   --> src/decoder.rs:75:1
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn extract_31_26(bitfield: u32) -> u8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `extract_25_21`
[INFO] [stderr]   --> src/decoder.rs:78:1
[INFO] [stderr]    |
[INFO] [stderr] 78 | pub fn extract_25_21(bitfield: u32) -> u8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `extract_20_16`
[INFO] [stderr]   --> src/decoder.rs:81:1
[INFO] [stderr]    |
[INFO] [stderr] 81 | pub fn extract_20_16(bitfield: u32) -> u8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `extract_15_11`
[INFO] [stderr]   --> src/decoder.rs:84:1
[INFO] [stderr]    |
[INFO] [stderr] 84 | pub fn extract_15_11(bitfield: u32) -> u8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `extract_15_0`
[INFO] [stderr]   --> src/decoder.rs:87:1
[INFO] [stderr]    |
[INFO] [stderr] 87 | pub fn extract_15_0(bitfield: u32) -> u16 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `extract_10_6`
[INFO] [stderr]   --> src/decoder.rs:90:1
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub fn extract_10_6(bitfield: u32) -> u8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `extract_5_0`
[INFO] [stderr]   --> src/decoder.rs:93:1
[INFO] [stderr]    |
[INFO] [stderr] 93 | pub fn extract_5_0(bitfield: u32) -> u8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `extract_25_0`
[INFO] [stderr]   --> src/decoder.rs:96:1
[INFO] [stderr]    |
[INFO] [stderr] 96 | pub fn extract_25_0(bitfield: u32) -> u32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `register`
[INFO] [stderr]  --> src/instruction/add.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn register(m: &mut HashMap<Opcode, Instruction>) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `register`
[INFO] [stderr]  --> src/instruction/and.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn register(m: &mut HashMap<Opcode, Instruction>) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `register`
[INFO] [stderr]  --> src/instruction/branch.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn register(m: &mut HashMap<Opcode, Instruction>) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `register`
[INFO] [stderr]  --> src/instruction/shift.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn register(m: &mut HashMap<Opcode, Instruction>) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Success`
[INFO] [stderr]  --> src/error.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Success(T),
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Exception`
[INFO] [stderr]  --> src/error.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Exception(ExecError),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unwrap`
[INFO] [stderr]   --> src/error.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn unwrap(self) -> T {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/error.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 | /     pub fn new<E>(kind: ErrorKind, error: E) -> Self
[INFO] [stderr] 28 | |         where E: Into<Box<error::Error + Send + Sync>>
[INFO] [stderr] 29 | |     {
[INFO] [stderr] 30 | |         ExecError {
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |         }
[INFO] [stderr] 34 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Overflow`
[INFO] [stderr]   --> src/error.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     Overflow,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `error::ExecResult`
[INFO] [stderr]  --> src/instruction/branch.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use error::ExecResult;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `masked_quickcheck`
[INFO] [stderr]  --> src/quickcheck_extra.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn masked_quickcheck(size: usize) -> QuickCheck<StdGen<rand::ThreadRng>> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Register`
[INFO] [stderr]   --> src/decoded.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub struct Register(pub u8);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `keys`
[INFO] [stderr]   --> src/decoder.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     pub fn keys(&self) -> Vec<Opcode> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unwrap`
[INFO] [stderr]   --> src/error.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn unwrap(self) -> T {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.02s
[INFO] running `"docker" "inspect" "15bd38a87edc4fef85c171a48d4e755286340e07d1b6ab9aff83d65638621c47"`
[INFO] running `"docker" "rm" "-f" "15bd38a87edc4fef85c171a48d4e755286340e07d1b6ab9aff83d65638621c47"`
[INFO] [stdout] 15bd38a87edc4fef85c171a48d4e755286340e07d1b6ab9aff83d65638621c47