[INFO] fetching crate life-backend 0.0.2...
[INFO] checking life-backend-0.0.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate life-backend 0.0.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate life-backend 0.0.2
[INFO] finished tweaking crates.io crate life-backend 0.0.2
[INFO] tweaked toml for crates.io crate life-backend 0.0.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate life-backend 0.0.2 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 crates.io crate life-backend 0.0.2 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] c8275e12c9e7de797f0c172c0d4b801c6783cd3c98ed014021967a655ffaaf44
[INFO] running `Command { std: "docker" "start" "-a" "c8275e12c9e7de797f0c172c0d4b801c6783cd3c98ed014021967a655ffaaf44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8275e12c9e7de797f0c172c0d4b801c6783cd3c98ed014021967a655ffaaf44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8275e12c9e7de797f0c172c0d4b801c6783cd3c98ed014021967a655ffaaf44", kill_on_drop: false }`
[INFO] [stdout] c8275e12c9e7de797f0c172c0d4b801c6783cd3c98ed014021967a655ffaaf44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 15b01bba016d153191163acc0874f01048aa01255e3d5591b37d9d48da05b90b
[INFO] running `Command { std: "docker" "start" "-a" "15b01bba016d153191163acc0874f01048aa01255e3d5591b37d9d48da05b90b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling rustix v0.37.20
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling serde v1.0.164
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking anstyle v1.0.1
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling serde_json v1.0.99
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]    Compiling anyhow v1.0.71
[INFO] [stderr]     Checking clap_lex v0.5.0
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking ciborium-io v0.2.1
[INFO] [stderr]     Checking plotters-backend v0.3.5
[INFO] [stderr]     Checking ciborium-ll v0.2.1
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking walkdir v2.3.3
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking plotters-svg v0.3.5
[INFO] [stderr]    Compiling syn v2.0.22
[INFO] [stderr]     Checking regex v1.8.4
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking num-iter v0.1.43
[INFO] [stderr]     Checking life-backend v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking is-terminal v0.4.7
[INFO] [stderr]     Checking anstream v0.3.2
[INFO] [stderr]     Checking clap_builder v4.3.8
[INFO] [stderr]    Compiling serde_derive v1.0.164
[INFO] [stderr]    Compiling clap_derive v4.3.2
[INFO] [stderr]     Checking clap v4.3.8
[INFO] [stderr]     Checking ciborium v0.2.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stdout] error: this type will no longer be must used: Result<position::Position<i16>, Infallible>
[INFO] [stdout]    --> src/position.rs:138:22
[INFO] [stdout]     |
[INFO] [stdout] 138 |         let target = Position::<i16>::try_from(base);
[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<position::Position<i16>, Infallible>
[INFO] [stdout]    --> src/position.rs:139:17
[INFO] [stdout]     |
[INFO] [stdout] 139 |         assert!(target.is_ok());
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<position::Position<i16>, Infallible>
[INFO] [stdout]    --> src/position.rs:156:22
[INFO] [stdout]     |
[INFO] [stdout] 156 |         let target = base.try_into::<i16>();
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<position::Position<i16>, Infallible>
[INFO] [stdout]    --> src/position.rs:157:17
[INFO] [stdout]     |
[INFO] [stdout] 157 |         assert!(target.is_ok());
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `life-backend` (lib test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "15b01bba016d153191163acc0874f01048aa01255e3d5591b37d9d48da05b90b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15b01bba016d153191163acc0874f01048aa01255e3d5591b37d9d48da05b90b", kill_on_drop: false }`
[INFO] [stdout] 15b01bba016d153191163acc0874f01048aa01255e3d5591b37d9d48da05b90b
