[INFO] cloning repository https://github.com/AKST/finite-repr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AKST/finite-repr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAKST%2Ffinite-repr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAKST%2Ffinite-repr'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4f03e624077c4182a74bc4adeedb030e13aba6f7
[INFO] checking AKST/finite-repr 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%2FAKST%2Ffinite-repr" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AKST/finite-repr
[INFO] finished tweaking git repo https://github.com/AKST/finite-repr
[INFO] tweaked toml for git repo https://github.com/AKST/finite-repr written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AKST/finite-repr 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/AKST/finite-repr 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] 2b5716161b3c0ed6d57d28e77dec35847ab20b306310381510393ec1a271812f
[INFO] running `Command { std: "docker" "start" "-a" "2b5716161b3c0ed6d57d28e77dec35847ab20b306310381510393ec1a271812f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b5716161b3c0ed6d57d28e77dec35847ab20b306310381510393ec1a271812f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b5716161b3c0ed6d57d28e77dec35847ab20b306310381510393ec1a271812f", kill_on_drop: false }`
[INFO] [stdout] 2b5716161b3c0ed6d57d28e77dec35847ab20b306310381510393ec1a271812f
[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] 392bbfaf64c5512d0b274dba6771702b84998c3c6bb3d5318f0e49d38c21287f
[INFO] running `Command { std: "docker" "start" "-a" "392bbfaf64c5512d0b274dba6771702b84998c3c6bb3d5318f0e49d38c21287f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.56
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking quote v1.0.7
[INFO] [stderr]     Checking finite_repr_derive v0.1.4 (/opt/rustwide/workdir/finite-repr-derive)
[INFO] [stdout] warning: trait `GetSpan` is never used
[INFO] [stdout]  --> finite-repr-derive/src/impl_error.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait GetSpan {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `GetSpan` is never used
[INFO] [stdout]  --> finite-repr-derive/src/impl_error.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait GetSpan {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking finite_repr v0.1.4 (/opt/rustwide/workdir/finite-repr-core)
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> finite-repr-core/src/finite_value.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     other.try_into().ok()
[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<usize, Infallible>
[INFO] [stdout]   --> finite-repr-core/src/finite_value.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     other.try_into().ok()
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `finite_repr` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> finite-repr-core/src/finite_value.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     other.try_into().ok()
[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<usize, Infallible>
[INFO] [stdout]   --> finite-repr-core/src/finite_value.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     other.try_into().ok()
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `finite_repr` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "392bbfaf64c5512d0b274dba6771702b84998c3c6bb3d5318f0e49d38c21287f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "392bbfaf64c5512d0b274dba6771702b84998c3c6bb3d5318f0e49d38c21287f", kill_on_drop: false }`
[INFO] [stdout] 392bbfaf64c5512d0b274dba6771702b84998c3c6bb3d5318f0e49d38c21287f