[INFO] fetching crate improv 1.0.0-beta.1...
[INFO] checking improv-1.0.0-beta.1 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate improv 1.0.0-beta.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate improv 1.0.0-beta.1 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate improv 1.0.0-beta.1
[INFO] finished tweaking crates.io crate improv 1.0.0-beta.1
[INFO] tweaked toml for crates.io crate improv 1.0.0-beta.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1c0d694130461fbfbbb76aafcbd6373f4a9354479ad6cf971460ad1ccb0c9631
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1c0d694130461fbfbbb76aafcbd6373f4a9354479ad6cf971460ad1ccb0c9631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c0d694130461fbfbbb76aafcbd6373f4a9354479ad6cf971460ad1ccb0c9631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c0d694130461fbfbbb76aafcbd6373f4a9354479ad6cf971460ad1ccb0c9631", kill_on_drop: false }`
[INFO] [stdout] 1c0d694130461fbfbbb76aafcbd6373f4a9354479ad6cf971460ad1ccb0c9631
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f3b718480a79de0f1d93ce7b3de03248622f00ec4c8f2cf109ab7d78d347dc45
[INFO] running `Command { std: "docker" "start" "-a" "f3b718480a79de0f1d93ce7b3de03248622f00ec4c8f2cf109ab7d78d347dc45", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling futures-core v0.3.18
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking improv v1.0.0-beta.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]   --> src/addr.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^ help: remove this attribute
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] note: attribute also specified here
[INFO] [stdout]   --> src/addr.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]   --> src/addr.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^ help: remove this attribute
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] note: attribute also specified here
[INFO] [stdout]   --> src/addr.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.25s
[INFO] running `Command { std: "docker" "inspect" "f3b718480a79de0f1d93ce7b3de03248622f00ec4c8f2cf109ab7d78d347dc45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3b718480a79de0f1d93ce7b3de03248622f00ec4c8f2cf109ab7d78d347dc45", kill_on_drop: false }`
[INFO] [stdout] f3b718480a79de0f1d93ce7b3de03248622f00ec4c8f2cf109ab7d78d347dc45