[INFO] fetching crate pearl 0.5.10...
[INFO] checking pearl-0.5.10 against master#f82664191d0e8764b7435b9d72eb0e366b8b1464 for pr-83354
[INFO] extracting crate pearl 0.5.10 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate pearl 0.5.10 on toolchain f82664191d0e8764b7435b9d72eb0e366b8b1464
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pearl 0.5.10
[INFO] finished tweaking crates.io crate pearl 0.5.10
[INFO] tweaked toml for crates.io crate pearl 0.5.10 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate pearl 0.5.10 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 900dcd145ba483dd7d16bad9765c9fb7c75f99b5ac0403dd3d1ddc2121af968b
[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" "900dcd145ba483dd7d16bad9765c9fb7c75f99b5ac0403dd3d1ddc2121af968b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "900dcd145ba483dd7d16bad9765c9fb7c75f99b5ac0403dd3d1ddc2121af968b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "900dcd145ba483dd7d16bad9765c9fb7c75f99b5ac0403dd3d1ddc2121af968b", kill_on_drop: false }`
[INFO] [stdout] 900dcd145ba483dd7d16bad9765c9fb7c75f99b5ac0403dd3d1ddc2121af968b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92cd9d11c3d42d12f1e93c8819e8c2a840488e53fe94000ab1d0320d1423f7c4
[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" "92cd9d11c3d42d12f1e93c8819e8c2a840488e53fe94000ab1d0320d1423f7c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]     Checking pin-project-lite v0.2.4
[INFO] [stderr]     Checking once_cell v1.7.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking funty v1.2.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking futures-channel v0.3.13
[INFO] [stderr]    Compiling tokio v1.2.0
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking rio v0.9.4
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]    Compiling ahash v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking bitvec v0.21.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking bincode v1.3.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking env_logger v0.8.3
[INFO] [stderr]    Compiling futures-macro v0.3.13
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling async-trait v0.1.42
[INFO] [stderr]     Checking futures-util v0.3.13
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking tokio-stream v0.1.3
[INFO] [stderr]     Checking futures-executor v0.3.13
[INFO] [stderr]     Checking futures v0.3.13
[INFO] [stderr]     Checking pearl v0.5.10 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.99s
[INFO] running `Command { std: "docker" "inspect" "92cd9d11c3d42d12f1e93c8819e8c2a840488e53fe94000ab1d0320d1423f7c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92cd9d11c3d42d12f1e93c8819e8c2a840488e53fe94000ab1d0320d1423f7c4", kill_on_drop: false }`
[INFO] [stdout] 92cd9d11c3d42d12f1e93c8819e8c2a840488e53fe94000ab1d0320d1423f7c4