[INFO] fetching crate pkg-version-impl 0.1.1...
[INFO] checking pkg-version-impl-0.1.1 against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] extracting crate pkg-version-impl 0.1.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate pkg-version-impl 0.1.1 on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pkg-version-impl 0.1.1
[INFO] finished tweaking crates.io crate pkg-version-impl 0.1.1
[INFO] tweaked toml for crates.io crate pkg-version-impl 0.1.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd0d9cbdc1dd972ab79fd80b91a09a941f7f490b5e2f8793dc1e84d260a1338b
[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" "cd0d9cbdc1dd972ab79fd80b91a09a941f7f490b5e2f8793dc1e84d260a1338b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd0d9cbdc1dd972ab79fd80b91a09a941f7f490b5e2f8793dc1e84d260a1338b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd0d9cbdc1dd972ab79fd80b91a09a941f7f490b5e2f8793dc1e84d260a1338b", kill_on_drop: false }`
[INFO] [stdout] cd0d9cbdc1dd972ab79fd80b91a09a941f7f490b5e2f8793dc1e84d260a1338b
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 851e5b4841ef7851c1b73f3aa0146c179c4f95b0889c7a85d0f31f352d27725a
[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" "851e5b4841ef7851c1b73f3aa0146c179c4f95b0889c7a85d0f31f352d27725a", kill_on_drop: false }`
[INFO] [stderr]     Checking pkg-version-impl v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused extern crate
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | extern crate proc_macro;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove it
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:9:40
[INFO] [stdout]    |
[INFO] [stdout] 9  | #![warn(missing_debug_implementations, rust_2018_idioms)]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_extern_crates)]` implied by `#[warn(rust_2018_idioms)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused extern crate
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | extern crate proc_macro;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove it
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:9:40
[INFO] [stdout]    |
[INFO] [stdout] 9  | #![warn(missing_debug_implementations, rust_2018_idioms)]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_extern_crates)]` implied by `#[warn(rust_2018_idioms)]`
[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 0.43s
[INFO] running `Command { std: "docker" "inspect" "851e5b4841ef7851c1b73f3aa0146c179c4f95b0889c7a85d0f31f352d27725a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "851e5b4841ef7851c1b73f3aa0146c179c4f95b0889c7a85d0f31f352d27725a", kill_on_drop: false }`
[INFO] [stdout] 851e5b4841ef7851c1b73f3aa0146c179c4f95b0889c7a85d0f31f352d27725a