[INFO] fetching crate twibint 0.3.2...
[INFO] checking twibint-0.3.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate twibint 0.3.2 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate twibint 0.3.2
[INFO] finished tweaking crates.io crate twibint 0.3.2
[INFO] tweaked toml for crates.io crate twibint 0.3.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate twibint 0.3.2 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 twibint 0.3.2 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 049324bcdc6ef3323f0689ed97ca1419d05d74c3ecef526ee8a1e0f355350d72
[INFO] running `Command { std: "docker" "start" "-a" "049324bcdc6ef3323f0689ed97ca1419d05d74c3ecef526ee8a1e0f355350d72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "049324bcdc6ef3323f0689ed97ca1419d05d74c3ecef526ee8a1e0f355350d72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "049324bcdc6ef3323f0689ed97ca1419d05d74c3ecef526ee8a1e0f355350d72", kill_on_drop: false }`
[INFO] [stdout] 049324bcdc6ef3323f0689ed97ca1419d05d74c3ecef526ee8a1e0f355350d72
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 4c3b57057f3bf225c54b8c66bd7b85300b03c2e376a5151503da889d0a2bc0fc
[INFO] running `Command { std: "docker" "start" "-a" "4c3b57057f3bf225c54b8c66bd7b85300b03c2e376a5151503da889d0a2bc0fc", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]     Checking twibint v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.31
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stdout] warning: associated constants `MAX` and `HALF_MAX` are never used
[INFO] [stdout]    --> src/traits/digit.rs:124:11
[INFO] [stdout]     |
[INFO] [stdout] 108 | pub trait DoubleDigit:
[INFO] [stdout]     |           ----------- associated constants in this trait
[INFO] [stdout] ...
[INFO] [stdout] 124 |     const MAX: Self;
[INFO] [stdout]     |           ^^^
[INFO] [stdout] 125 |     const HALF_MAX: Self;
[INFO] [stdout]     |           ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/bigfloat/mod.rs:47:31
[INFO] [stdout]    |
[INFO] [stdout] 47 |           let nb_zeros: usize = self
[INFO] [stdout]    |  _______________________________^
[INFO] [stdout] 48 | |             .int
[INFO] [stdout] 49 | |             .uint
[INFO] [stdout] 50 | |             .val
[INFO] [stdout] ...  |
[INFO] [stdout] 53 | |             .count()
[INFO] [stdout] 54 | |             .try_into()
[INFO] [stdout]    | |_______________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `twibint` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "4c3b57057f3bf225c54b8c66bd7b85300b03c2e376a5151503da889d0a2bc0fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c3b57057f3bf225c54b8c66bd7b85300b03c2e376a5151503da889d0a2bc0fc", kill_on_drop: false }`
[INFO] [stdout] 4c3b57057f3bf225c54b8c66bd7b85300b03c2e376a5151503da889d0a2bc0fc
