[INFO] fetching crate cargo-fel4 0.7.2...
[INFO] checking cargo-fel4-0.7.2 against beta for pr-78714
[INFO] extracting crate cargo-fel4 0.7.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate cargo-fel4 0.7.2 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo-fel4 0.7.2
[INFO] finished tweaking crates.io crate cargo-fel4 0.7.2
[INFO] tweaked toml for crates.io crate cargo-fel4 0.7.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", 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] 4090dba0072c00a6efa5788b869ffb1463761f69fb0b16d5be7fdc50eb3f9677
[INFO] running `Command { std: "docker" "start" "-a" "4090dba0072c00a6efa5788b869ffb1463761f69fb0b16d5be7fdc50eb3f9677", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4090dba0072c00a6efa5788b869ffb1463761f69fb0b16d5be7fdc50eb3f9677", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4090dba0072c00a6efa5788b869ffb1463761f69fb0b16d5be7fdc50eb3f9677", kill_on_drop: false }`
[INFO] [stdout] 4090dba0072c00a6efa5788b869ffb1463761f69fb0b16d5be7fdc50eb3f9677
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e1edeb91fe480a8b7ade8fe65030f3647d56197e667151933d76b5587a00fc6
[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" "0e1edeb91fe480a8b7ade8fe65030f3647d56197e667151933d76b5587a00fc6", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking cc v1.0.62
[INFO] [stderr]     Checking lazy_static v0.1.16
[INFO] [stderr]     Checking multimap v0.4.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking bit-vec v0.6.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking proc-macro2 v0.3.8
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]     Checking cargo_metadata v0.5.8
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking quote v0.5.2
[INFO] [stderr]     Checking cmake v0.1.44
[INFO] [stderr]     Checking syn v0.13.11
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking fel4-config v0.3.2
[INFO] [stderr]     Checking cmake_config v0.1.1
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking cargo-fel4 v0.7.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rusty-fork v0.2.2
[INFO] [stderr]     Checking proptest v0.8.7
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.84s
[INFO] running `Command { std: "docker" "inspect" "0e1edeb91fe480a8b7ade8fe65030f3647d56197e667151933d76b5587a00fc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e1edeb91fe480a8b7ade8fe65030f3647d56197e667151933d76b5587a00fc6", kill_on_drop: false }`
[INFO] [stdout] 0e1edeb91fe480a8b7ade8fe65030f3647d56197e667151933d76b5587a00fc6