[INFO] fetching crate frust 0.0.7...
[INFO] checking frust-0.0.7 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate frust 0.0.7 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate frust 0.0.7 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate frust 0.0.7
[INFO] finished tweaking crates.io crate frust 0.0.7
[INFO] tweaked toml for crates.io crate frust 0.0.7 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e79b9428be3312d87c191eac519e4ac239562ecc6f83a4a2113817ee438bc2b
[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" "7e79b9428be3312d87c191eac519e4ac239562ecc6f83a4a2113817ee438bc2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e79b9428be3312d87c191eac519e4ac239562ecc6f83a4a2113817ee438bc2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e79b9428be3312d87c191eac519e4ac239562ecc6f83a4a2113817ee438bc2b", kill_on_drop: false }`
[INFO] [stdout] 7e79b9428be3312d87c191eac519e4ac239562ecc6f83a4a2113817ee438bc2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7bf7d8dd97cece6bd5395d7b37f760f4b78d6db9ac47aca6d2e4cda198510a7
[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" "e7bf7d8dd97cece6bd5395d7b37f760f4b78d6db9ac47aca6d2e4cda198510a7", kill_on_drop: false }`
[INFO] [stderr]     Checking frust v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]    --> src/semigroup.rs:313:9
[INFO] [stdout]     |
[INFO] [stdout] 313 |     use std::collections::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::*`
[INFO] [stdout]    --> src/semigroup.rs:314:9
[INFO] [stdout]     |
[INFO] [stdout] 314 |     use std::cell::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]    --> src/monoid.rs:226:9
[INFO] [stdout]     |
[INFO] [stdout] 226 |     use std::collections::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.62s
[INFO] running `Command { std: "docker" "inspect" "e7bf7d8dd97cece6bd5395d7b37f760f4b78d6db9ac47aca6d2e4cda198510a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7bf7d8dd97cece6bd5395d7b37f760f4b78d6db9ac47aca6d2e4cda198510a7", kill_on_drop: false }`
[INFO] [stdout] e7bf7d8dd97cece6bd5395d7b37f760f4b78d6db9ac47aca6d2e4cda198510a7