[INFO] cloning repository https://github.com/johnsonw/graph_serialization
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/johnsonw/graph_serialization" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnsonw%2Fgraph_serialization", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnsonw%2Fgraph_serialization'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 66d100953c616d290cf630fb8747635fc6639b05
[INFO] checking johnsonw/graph_serialization against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnsonw%2Fgraph_serialization" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  73% (187/255)
Updating files:  74% (189/255)
Updating files:  75% (192/255)
Updating files:  76% (194/255)
Updating files:  77% (197/255)
Updating files:  78% (199/255)
Updating files:  79% (202/255)
Updating files:  80% (204/255)
Updating files:  81% (207/255)
Updating files:  82% (210/255)
Updating files:  83% (212/255)
Updating files:  84% (215/255)
Updating files:  85% (217/255)
Updating files:  86% (220/255)
Updating files:  87% (222/255)
Updating files:  88% (225/255)
Updating files:  89% (227/255)
Updating files:  90% (230/255)
Updating files:  91% (233/255)
Updating files:  92% (235/255)
Updating files:  93% (238/255)
Updating files:  94% (240/255)
Updating files:  95% (243/255)
Updating files:  96% (245/255)
Updating files:  97% (248/255)
Updating files:  98% (250/255)
Updating files:  99% (253/255)
Updating files: 100% (255/255)
Updating files: 100% (255/255), done.
[INFO] validating manifest of git repo https://github.com/johnsonw/graph_serialization on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/johnsonw/graph_serialization
[INFO] finished tweaking git repo https://github.com/johnsonw/graph_serialization
[INFO] tweaked toml for git repo https://github.com/johnsonw/graph_serialization written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/johnsonw/graph_serialization already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f57625d6aae3f425b47e5728984e4c345651873361cd06aaeb8a44926aa22b90
[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" "f57625d6aae3f425b47e5728984e4c345651873361cd06aaeb8a44926aa22b90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f57625d6aae3f425b47e5728984e4c345651873361cd06aaeb8a44926aa22b90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f57625d6aae3f425b47e5728984e4c345651873361cd06aaeb8a44926aa22b90", kill_on_drop: false }`
[INFO] [stdout] f57625d6aae3f425b47e5728984e4c345651873361cd06aaeb8a44926aa22b90
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d4c76d27fffd8ad4107aac3132c27f5eb4e95bee7e1aa2d245ed831335c47d6
[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" "0d4c76d27fffd8ad4107aac3132c27f5eb4e95bee7e1aa2d245ed831335c47d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]     Checking serde v1.0.123
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]     Checking test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.35s
[INFO] running `Command { std: "docker" "inspect" "0d4c76d27fffd8ad4107aac3132c27f5eb4e95bee7e1aa2d245ed831335c47d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d4c76d27fffd8ad4107aac3132c27f5eb4e95bee7e1aa2d245ed831335c47d6", kill_on_drop: false }`
[INFO] [stdout] 0d4c76d27fffd8ad4107aac3132c27f5eb4e95bee7e1aa2d245ed831335c47d6