[INFO] fetching crate rill-engine 0.37.0-rc.1...
[INFO] checking rill-engine-0.37.0-rc.1 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate rill-engine 0.37.0-rc.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate rill-engine 0.37.0-rc.1 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rill-engine 0.37.0-rc.1
[INFO] finished tweaking crates.io crate rill-engine 0.37.0-rc.1
[INFO] tweaked toml for crates.io crate rill-engine 0.37.0-rc.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "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] 43c24dea244f74e645a87664a15677f4bea6f9e3ca8f0a9ae76e071857db75d5
[INFO] running `Command { std: "docker" "start" "-a" "43c24dea244f74e645a87664a15677f4bea6f9e3ca8f0a9ae76e071857db75d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43c24dea244f74e645a87664a15677f4bea6f9e3ca8f0a9ae76e071857db75d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43c24dea244f74e645a87664a15677f4bea6f9e3ca8f0a9ae76e071857db75d5", kill_on_drop: false }`
[INFO] [stdout] 43c24dea244f74e645a87664a15677f4bea6f9e3ca8f0a9ae76e071857db75d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "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] e50932e94dab7bae9b1d248a7a2c933196db825c068a3dd097856d6d4e8a729f
[INFO] running `Command { std: "docker" "start" "-a" "e50932e94dab7bae9b1d248a7a2c933196db825c068a3dd097856d6d4e8a729f", 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] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking socket2 v0.4.1
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling strum_macros v0.21.1
[INFO] [stderr]     Checking meio-protocol v0.93.3
[INFO] [stderr]     Checking vectorize v0.2.0
[INFO] [stderr]     Checking flexbuffers v2.0.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking headers v0.3.4
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking nix v0.22.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking tokio v1.10.0
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking ordered-float v2.7.0
[INFO] [stderr]     Checking rill-protocol v0.37.0-rc.1
[INFO] [stderr]     Checking tungstenite v0.14.0
[INFO] [stderr]     Checking strum v0.21.0
[INFO] [stderr]     Checking ctrlc v3.2.0
[INFO] [stderr]     Checking tokio-util v0.6.7
[INFO] [stderr]     Checking tokio-tungstenite v0.15.0
[INFO] [stderr]     Checking tokio-stream v0.1.7
[INFO] [stderr]     Checking h2 v0.3.3
[INFO] [stderr]     Checking meio v0.93.3
[INFO] [stderr]     Checking hyper v0.14.11
[INFO] [stderr]     Checking meio-connect v0.93.3
[INFO] [stderr]     Checking rill-engine v0.37.0-rc.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.65s
[INFO] running `Command { std: "docker" "inspect" "e50932e94dab7bae9b1d248a7a2c933196db825c068a3dd097856d6d4e8a729f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e50932e94dab7bae9b1d248a7a2c933196db825c068a3dd097856d6d4e8a729f", kill_on_drop: false }`
[INFO] [stdout] e50932e94dab7bae9b1d248a7a2c933196db825c068a3dd097856d6d4e8a729f