[INFO] cloning repository https://github.com/fractalide/puff
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fractalide/puff" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffractalide%2Fpuff"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffractalide%2Fpuff'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6a3a5961838ce727f9af60588f78e84a34a912e8
[INFO] checking fractalide/puff against master#201e52e5fe73ccf3dd22946b1216ad8d64f8c2ba for pr-63809
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffractalide%2Fpuff" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fractalide/puff on toolchain 201e52e5fe73ccf3dd22946b1216ad8d64f8c2ba
[INFO] running `"/workspace/cargo-home/bin/cargo" "+201e52e5fe73ccf3dd22946b1216ad8d64f8c2ba" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/fractalide/puff
[INFO] finished tweaking git repo https://github.com/fractalide/puff
[INFO] tweaked toml for git repo https://github.com/fractalide/puff written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/fractalide/puff already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+201e52e5fe73ccf3dd22946b1216ad8d64f8c2ba" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+201e52e5fe73ccf3dd22946b1216ad8d64f8c2ba" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c5f510ec23dc3ef44bdc35a01c5341cae7f79aeced2a19176c735fa6bf0a513e
[INFO] running `"docker" "start" "-a" "c5f510ec23dc3ef44bdc35a01c5341cae7f79aeced2a19176c735fa6bf0a513e"`
[INFO] [stderr]    Compiling serde_derive v1.0.97
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking h2 v0.1.25
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking actix-threadpool v0.1.1
[INFO] [stderr]     Checking actix-utils v0.4.4
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking actix-rt v0.2.4
[INFO] [stderr]     Checking tokio-signal v0.2.7
[INFO] [stderr]     Checking trust-dns-proto v0.7.4
[INFO] [stderr]     Checking actix-server-config v0.1.2
[INFO] [stderr]     Checking actix-server v0.6.0
[INFO] [stderr]     Checking trust-dns-resolver v0.11.1
[INFO] [stderr]     Checking actix-connect v0.2.1
[INFO] [stderr]     Checking serde v1.0.97
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking actix-router v0.1.5
[INFO] [stderr]     Checking actix-http v0.2.7
[INFO] [stderr]     Checking awc v0.2.2
[INFO] [stderr]     Checking actix-web v1.0.5
[INFO] [stderr]     Checking actix-files v0.1.3
[INFO] [stderr]     Checking actix-session v0.1.1
[INFO] [stderr]     Checking puff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 02s
[INFO] running `"docker" "inspect" "c5f510ec23dc3ef44bdc35a01c5341cae7f79aeced2a19176c735fa6bf0a513e"`
[INFO] running `"docker" "rm" "-f" "c5f510ec23dc3ef44bdc35a01c5341cae7f79aeced2a19176c735fa6bf0a513e"`
[INFO] [stdout] c5f510ec23dc3ef44bdc35a01c5341cae7f79aeced2a19176c735fa6bf0a513e