[INFO] fetching crate prs-cli 0.3.2...
[INFO] testing prs-cli-0.3.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate prs-cli 0.3.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate prs-cli 0.3.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prs-cli 0.3.2
[INFO] finished tweaking crates.io crate prs-cli 0.3.2
[INFO] tweaked toml for crates.io crate prs-cli 0.3.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate prs-cli 0.3.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc09cbc01c224edfc73a94d0f9cab15e67f84b2ba0054466d2aa572fb405f7f5
[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" "cc09cbc01c224edfc73a94d0f9cab15e67f84b2ba0054466d2aa572fb405f7f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc09cbc01c224edfc73a94d0f9cab15e67f84b2ba0054466d2aa572fb405f7f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc09cbc01c224edfc73a94d0f9cab15e67f84b2ba0054466d2aa572fb405f7f5", kill_on_drop: false }`
[INFO] [stdout] cc09cbc01c224edfc73a94d0f9cab15e67f84b2ba0054466d2aa572fb405f7f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--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] 8999f22d191290763eaa9e1c4ba7031cf04f7fb46bd1819691123380f920f4a9
[INFO] running `Command { std: "docker" "start" "-a" "8999f22d191290763eaa9e1c4ba7031cf04f7fb46bd1819691123380f920f4a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling copypasta-ext v0.3.7
[INFO] [stderr]    Compiling prs-lib v0.3.2
[INFO] [stderr]    Compiling git-state v0.1.0
[INFO] [stderr]    Compiling beef v0.5.1
[INFO] [stderr]    Compiling bytesize v1.1.0
[INFO] [stderr]    Compiling text_trees v0.1.2
[INFO] [stderr]    Compiling fuzzy-matcher v0.3.7
[INFO] [stderr]    Compiling socket2 v0.4.1
[INFO] [stderr]    Compiling dirs-sys v0.3.6
[INFO] [stderr]    Compiling polling v2.1.0
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling nix v0.19.1
[INFO] [stderr]    Compiling secstr v0.4.0
[INFO] [stderr]    Compiling nom v7.0.0
[INFO] [stderr]    Compiling futures-lite v1.12.0
[INFO] [stderr]    Compiling crossbeam-queue v0.3.2
[INFO] [stderr]    Compiling wayland-scanner v0.28.6
[INFO] [stderr]    Compiling nix v0.20.1
[INFO] [stderr]    Compiling nix v0.22.1
[INFO] [stderr]    Compiling xcb v0.9.0
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling nb-connect v1.2.0
[INFO] [stderr]    Compiling vte v0.9.0
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling defer-drop v1.0.1
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling crossbeam v0.8.1
[INFO] [stderr]    Compiling term v0.6.1
[INFO] [stderr]    Compiling async-io v1.6.0
[INFO] [stderr]    Compiling edit v0.1.3
[INFO] [stderr]    Compiling timer v0.2.0
[INFO] [stderr] error: could not compile `nix`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name nix /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nix-0.17.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=afca8f6cf493022b -C extra-filename=-afca8f6cf493022b --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-117d41ac256572da.rmeta --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-4dc40f94662accb2.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-3daf5756cb8889ad.rmeta --extern void=/opt/rustwide/target/debug/deps/libvoid-db8f1174cd903021.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8999f22d191290763eaa9e1c4ba7031cf04f7fb46bd1819691123380f920f4a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8999f22d191290763eaa9e1c4ba7031cf04f7fb46bd1819691123380f920f4a9", kill_on_drop: false }`
[INFO] [stdout] 8999f22d191290763eaa9e1c4ba7031cf04f7fb46bd1819691123380f920f4a9