[INFO] fetching crate fct 0.1.0...
[INFO] checking fct-0.1.0 against master#7f5a42b073dc2bee2aa625052eb066ee07072048 for pr-78991
[INFO] extracting crate fct 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate fct 0.1.0 on toolchain 7f5a42b073dc2bee2aa625052eb066ee07072048
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fct 0.1.0
[INFO] finished tweaking crates.io crate fct 0.1.0
[INFO] tweaked toml for crates.io crate fct 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate fct 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 106689c66a81d578b9af3c9463afa6fa40b0438a4419a2e154aef07f5727c8a0
[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" "106689c66a81d578b9af3c9463afa6fa40b0438a4419a2e154aef07f5727c8a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "106689c66a81d578b9af3c9463afa6fa40b0438a4419a2e154aef07f5727c8a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "106689c66a81d578b9af3c9463afa6fa40b0438a4419a2e154aef07f5727c8a0", kill_on_drop: false }`
[INFO] [stdout] 106689c66a81d578b9af3c9463afa6fa40b0438a4419a2e154aef07f5727c8a0
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "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] e3f7b20047d7a5dd6209aa712cfbc0527e709f82d3953b5b2fe04f232245071f
[INFO] running `Command { std: "docker" "start" "-a" "e3f7b20047d7a5dd6209aa712cfbc0527e709f82d3953b5b2fe04f232245071f", kill_on_drop: false }`
[INFO] [stderr]     Checking fct v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "e3f7b20047d7a5dd6209aa712cfbc0527e709f82d3953b5b2fe04f232245071f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3f7b20047d7a5dd6209aa712cfbc0527e709f82d3953b5b2fe04f232245071f", kill_on_drop: false }`
[INFO] [stdout] e3f7b20047d7a5dd6209aa712cfbc0527e709f82d3953b5b2fe04f232245071f