[INFO] fetching crate ptth_server 2.1.0...
[INFO] testing ptth_server-2.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate ptth_server 2.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate ptth_server 2.1.0 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 ptth_server 2.1.0
[INFO] finished tweaking crates.io crate ptth_server 2.1.0
[INFO] tweaked toml for crates.io crate ptth_server 2.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate ptth_server 2.1.0 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] 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] 32adc8b725d0e48f55dfde4989072fa7a652715238d76ddf971ae760c8ccb5a8
[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" "32adc8b725d0e48f55dfde4989072fa7a652715238d76ddf971ae760c8ccb5a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32adc8b725d0e48f55dfde4989072fa7a652715238d76ddf971ae760c8ccb5a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32adc8b725d0e48f55dfde4989072fa7a652715238d76ddf971ae760c8ccb5a8", kill_on_drop: false }`
[INFO] [stdout] 32adc8b725d0e48f55dfde4989072fa7a652715238d76ddf971ae760c8ccb5a8
[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] [stdout] 72d2d86fdcd16d6296a7bb22dfe97790ef63fc221bcac6ea07fb6755b72ecd2e
[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" "72d2d86fdcd16d6296a7bb22dfe97790ef63fc221bcac6ea07fb6755b72ecd2e", kill_on_drop: false }`
[INFO] [stderr]    Compiling signal-hook v0.3.8
[INFO] [stderr]    Compiling heim-common v0.1.0-rc.1
[INFO] [stderr]    Compiling platforms v1.0.3
[INFO] [stderr]    Compiling heim-host v0.1.0-rc.1
[INFO] [stderr]    Compiling always_equal v1.0.2
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling blake3 v0.3.7
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling futures-lite v1.11.3
[INFO] [stderr]    Compiling polling v2.0.3
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling mio v0.7.11
[INFO] [stderr]    Compiling nix v0.19.1
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling nix v0.20.0
[INFO] [stderr]    Compiling tracing-log v0.1.2
[INFO] [stderr]    Compiling openssl-sys v0.9.63
[INFO] [stderr]    Compiling ordered-float v2.0.1
[INFO] [stderr]    Compiling rmp v0.8.10
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling crypto-mac v0.8.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling futures-util v0.3.14
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling blocking v1.0.2
[INFO] [stderr]    Compiling async-io v1.4.1
[INFO] [stderr]    Compiling async-executor v1.4.1
[INFO] [stderr]    Compiling tracing-serde v0.1.2
[INFO] [stderr]    Compiling rmp-serde v0.14.4
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stderr]    Compiling openssl v0.10.34
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling async-fs v1.5.0
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling async-process v1.1.0
[INFO] [stderr]    Compiling async-net v1.6.0
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling uom v0.30.0
[INFO] [stderr]    Compiling rusty_ulid v0.10.1
[INFO] [stderr]    Compiling smol v1.2.5
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]    Compiling futures-executor v0.3.14
[INFO] [stderr]    Compiling ctrlc v3.1.9
[INFO] [stderr] error: could not compile `nix`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name nix --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nix-0.20.0/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=3ab3ecf1e0d660d3 -C extra-filename=-3ab3ecf1e0d660d3 --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-dece450273084492.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-cb41864e85e35c76.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" "72d2d86fdcd16d6296a7bb22dfe97790ef63fc221bcac6ea07fb6755b72ecd2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72d2d86fdcd16d6296a7bb22dfe97790ef63fc221bcac6ea07fb6755b72ecd2e", kill_on_drop: false }`
[INFO] [stdout] 72d2d86fdcd16d6296a7bb22dfe97790ef63fc221bcac6ea07fb6755b72ecd2e