[INFO] fetching crate iref 1.4.3...
[INFO] checking iref-1.4.3 against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] extracting crate iref 1.4.3 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate iref 1.4.3 on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate iref 1.4.3
[INFO] finished tweaking crates.io crate iref 1.4.3
[INFO] tweaked toml for crates.io crate iref 1.4.3 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate iref 1.4.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3cd6e22ada164272746c0f820aaa65acc5ad539d4ff2955990104d5e83982cdf
[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" "3cd6e22ada164272746c0f820aaa65acc5ad539d4ff2955990104d5e83982cdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3cd6e22ada164272746c0f820aaa65acc5ad539d4ff2955990104d5e83982cdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cd6e22ada164272746c0f820aaa65acc5ad539d4ff2955990104d5e83982cdf", kill_on_drop: false }`
[INFO] [stdout] 3cd6e22ada164272746c0f820aaa65acc5ad539d4ff2955990104d5e83982cdf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "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] ff81c5c0cda3680a3b31653ac0654f71603232e1322e36c0fc46579f71b8322e
[INFO] running `Command { std: "docker" "start" "-a" "ff81c5c0cda3680a3b31653ac0654f71603232e1322e36c0fc46579f71b8322e", kill_on_drop: false }`
[INFO] [stderr]     Checking pct-str v1.1.0
[INFO] [stderr]     Checking iref v1.4.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.51s
[INFO] running `Command { std: "docker" "inspect" "ff81c5c0cda3680a3b31653ac0654f71603232e1322e36c0fc46579f71b8322e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff81c5c0cda3680a3b31653ac0654f71603232e1322e36c0fc46579f71b8322e", kill_on_drop: false }`
[INFO] [stdout] ff81c5c0cda3680a3b31653ac0654f71603232e1322e36c0fc46579f71b8322e