[INFO] cloning repository https://github.com/mihaimaganu17/mm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mihaimaganu17/mm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmihaimaganu17%2Fmm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmihaimaganu17%2Fmm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cc36bb7a7212d4c5b96b39c9e67a0334110c41b5
[INFO] checking mihaimaganu17/mm against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmihaimaganu17%2Fmm" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mihaimaganu17/mm
[INFO] finished tweaking git repo https://github.com/mihaimaganu17/mm
[INFO] tweaked toml for git repo https://github.com/mihaimaganu17/mm written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mihaimaganu17/mm on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mihaimaganu17/mm 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae2790a3d8eeb2f9b97abd8de1e34f1fe7dd17666dde854d45712779f819f9a4
[INFO] running `Command { std: "docker" "start" "-a" "ae2790a3d8eeb2f9b97abd8de1e34f1fe7dd17666dde854d45712779f819f9a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae2790a3d8eeb2f9b97abd8de1e34f1fe7dd17666dde854d45712779f819f9a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae2790a3d8eeb2f9b97abd8de1e34f1fe7dd17666dde854d45712779f819f9a4", kill_on_drop: false }`
[INFO] [stdout] ae2790a3d8eeb2f9b97abd8de1e34f1fe7dd17666dde854d45712779f819f9a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1559e769efa645463cc6b5cdb8b499ff428d1918ae5cbc1f9b3209d8ee704c56
[INFO] running `Command { std: "docker" "start" "-a" "1559e769efa645463cc6b5cdb8b499ff428d1918ae5cbc1f9b3209d8ee704c56", kill_on_drop: false }`
[INFO] [stderr]     Checking mm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `MEM_POOL_SIZE` is never used
[INFO] [stdout]  --> src/alloc.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | const MEM_POOL_SIZE: usize = 256 * 10024;
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MmAllocator` is never constructed
[INFO] [stdout]   --> src/alloc.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct MmAllocator {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:47:50
[INFO] [stdout]    |
[INFO] [stdout] 47 |       fn try_into(self) -> Result<u8, Self::Error> {
[INFO] [stdout]    |  __________________________________________________^
[INFO] [stdout] 48 | |         match self {
[INFO] [stdout] 49 | |             Self::Return => Ok(0),
[INFO] [stdout] 50 | |             Self::Constant => Ok(1),
[INFO] [stdout] ...  |
[INFO] [stdout] 59 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 | /         match self {
[INFO] [stdout] 49 | |             Self::Return => Ok(0),
[INFO] [stdout] 50 | |             Self::Constant => Ok(1),
[INFO] [stdout] 51 | |             Self::ConstantLong => Ok(2),
[INFO] [stdout] ...  |
[INFO] [stdout] 57 | |             Self::Unknown(value) => Ok(value),
[INFO] [stdout] 58 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:49:29
[INFO] [stdout]    |
[INFO] [stdout] 49 |             Self::Return => Ok(0),
[INFO] [stdout]    |                             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:50:31
[INFO] [stdout]    |
[INFO] [stdout] 50 |             Self::Constant => Ok(1),
[INFO] [stdout]    |                               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:51:35
[INFO] [stdout]    |
[INFO] [stdout] 51 |             Self::ConstantLong => Ok(2),
[INFO] [stdout]    |                                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:52:29
[INFO] [stdout]    |
[INFO] [stdout] 52 |             Self::Negate => Ok(3),
[INFO] [stdout]    |                             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:53:26
[INFO] [stdout]    |
[INFO] [stdout] 53 |             Self::Add => Ok(4),
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:54:26
[INFO] [stdout]    |
[INFO] [stdout] 54 |             Self::Sub => Ok(5),
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:55:26
[INFO] [stdout]    |
[INFO] [stdout] 55 |             Self::Mul => Ok(6),
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:56:26
[INFO] [stdout]    |
[INFO] [stdout] 56 |             Self::Div => Ok(7),
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:57:37
[INFO] [stdout]    |
[INFO] [stdout] 57 |             Self::Unknown(value) => Ok(value),
[INFO] [stdout]    |                                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mm` (lib) due to 11 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: constant `MEM_POOL_SIZE` is never used
[INFO] [stdout]  --> src/alloc.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | const MEM_POOL_SIZE: usize = 256 * 10024;
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MmAllocator` is never constructed
[INFO] [stdout]   --> src/alloc.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct MmAllocator {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:47:50
[INFO] [stdout]    |
[INFO] [stdout] 47 |       fn try_into(self) -> Result<u8, Self::Error> {
[INFO] [stdout]    |  __________________________________________________^
[INFO] [stdout] 48 | |         match self {
[INFO] [stdout] 49 | |             Self::Return => Ok(0),
[INFO] [stdout] 50 | |             Self::Constant => Ok(1),
[INFO] [stdout] ...  |
[INFO] [stdout] 59 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 | /         match self {
[INFO] [stdout] 49 | |             Self::Return => Ok(0),
[INFO] [stdout] 50 | |             Self::Constant => Ok(1),
[INFO] [stdout] 51 | |             Self::ConstantLong => Ok(2),
[INFO] [stdout] ...  |
[INFO] [stdout] 57 | |             Self::Unknown(value) => Ok(value),
[INFO] [stdout] 58 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:49:29
[INFO] [stdout]    |
[INFO] [stdout] 49 |             Self::Return => Ok(0),
[INFO] [stdout]    |                             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:50:31
[INFO] [stdout]    |
[INFO] [stdout] 50 |             Self::Constant => Ok(1),
[INFO] [stdout]    |                               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:51:35
[INFO] [stdout]    |
[INFO] [stdout] 51 |             Self::ConstantLong => Ok(2),
[INFO] [stdout]    |                                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:52:29
[INFO] [stdout]    |
[INFO] [stdout] 52 |             Self::Negate => Ok(3),
[INFO] [stdout]    |                             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:53:26
[INFO] [stdout]    |
[INFO] [stdout] 53 |             Self::Add => Ok(4),
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:54:26
[INFO] [stdout]    |
[INFO] [stdout] 54 |             Self::Sub => Ok(5),
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:55:26
[INFO] [stdout]    |
[INFO] [stdout] 55 |             Self::Mul => Ok(6),
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:56:26
[INFO] [stdout]    |
[INFO] [stdout] 56 |             Self::Div => Ok(7),
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, OpCodeError>
[INFO] [stdout]   --> src/bytecode.rs:57:37
[INFO] [stdout]    |
[INFO] [stdout] 57 |             Self::Unknown(value) => Ok(value),
[INFO] [stdout]    |                                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mm` (lib test) due to 11 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "1559e769efa645463cc6b5cdb8b499ff428d1918ae5cbc1f9b3209d8ee704c56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1559e769efa645463cc6b5cdb8b499ff428d1918ae5cbc1f9b3209d8ee704c56", kill_on_drop: false }`
[INFO] [stdout] 1559e769efa645463cc6b5cdb8b499ff428d1918ae5cbc1f9b3209d8ee704c56
