[INFO] cloning repository https://github.com/HappyDustbunny/fern
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HappyDustbunny/fern" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHappyDustbunny%2Ffern", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHappyDustbunny%2Ffern'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c1269b509f8759110724eb87fadacd4081d82dae
[INFO] testing HappyDustbunny/fern against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHappyDustbunny%2Ffern" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/HappyDustbunny/fern on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/HappyDustbunny/fern
[INFO] finished tweaking git repo https://github.com/HappyDustbunny/fern
[INFO] tweaked toml for git repo https://github.com/HappyDustbunny/fern written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/HappyDustbunny/fern already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded metal v0.13.1
[INFO] [stderr]   Downloaded image v0.21.2
[INFO] [stderr]   Downloaded vk-sys v0.4.0
[INFO] [stderr]   Downloaded blake2b_simd v0.5.6
[INFO] [stderr]   Downloaded cmake v0.1.41
[INFO] [stderr]   Downloaded vulkano-shaders v0.13.0
[INFO] [stderr]   Downloaded openssl-sys v0.9.48
[INFO] [stderr]   Downloaded crossbeam v0.5.0
[INFO] [stderr]   Downloaded shaderc v0.5.1
[INFO] [stderr]   Downloaded conrod_vulkano v0.66.0
[INFO] [stderr]   Downloaded conrod_derive v0.66.0
[INFO] [stderr]   Downloaded vulkano v0.13.0
[INFO] [stderr]   Downloaded conrod_core v0.66.0
[INFO] [stderr]   Downloaded conrod_winit v0.66.0
[INFO] [stderr]   Downloaded rusttype v0.7.7
[INFO] [stderr]   Downloaded getrandom v0.1.8
[INFO] [stderr]   Downloaded objc_exception v0.1.1
[INFO] [stderr]   Downloaded rust-argon2 v0.5.0
[INFO] [stderr]   Downloaded vulkano-win v0.13.0
[INFO] [stderr]   Downloaded curl v0.4.22
[INFO] [stderr]   Downloaded winit v0.19.2
[INFO] [stderr]   Downloaded nannou v0.10.0
[INFO] [stderr]   Downloaded curl-sys v0.4.20
[INFO] [stderr]   Downloaded pbr v1.0.1
[INFO] [stderr]   Downloaded shaderc-sys v0.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5dec4a884a4bd5bfc6f1729833f8304cddac2904f5001a1787cf047e39f48a9f
[INFO] running `Command { std: "docker" "start" "-a" "5dec4a884a4bd5bfc6f1729833f8304cddac2904f5001a1787cf047e39f48a9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5dec4a884a4bd5bfc6f1729833f8304cddac2904f5001a1787cf047e39f48a9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dec4a884a4bd5bfc6f1729833f8304cddac2904f5001a1787cf047e39f48a9f", kill_on_drop: false }`
[INFO] [stdout] 5dec4a884a4bd5bfc6f1729833f8304cddac2904f5001a1787cf047e39f48a9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b2efdc26c7e080f83f3c092baa655e61a154cc3cb35b85f2b24fd4e0bb38efb
[INFO] running `Command { std: "docker" "start" "-a" "3b2efdc26c7e080f83f3c092baa655e61a154cc3cb35b85f2b24fd4e0bb38efb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling cc v1.0.38
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling xml-rs v0.8.0
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling adler32 v1.0.3
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling linked-hash-map v0.5.2
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling same-file v1.0.5
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling downcast-rs v1.0.4
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling color_quant v1.0.1
[INFO] [stderr]    Compiling pkg-config v0.3.15
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling vulkano v0.13.0
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling xdg v2.2.0
[INFO] [stderr]    Compiling piston-float v0.3.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling vk-sys v0.4.0
[INFO] [stderr]    Compiling half v1.3.0
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling approx v0.1.1
[INFO] [stderr]    Compiling instant v0.1.1
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling find_folder v0.3.0
[INFO] [stderr]    Compiling conrod_winit v0.66.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling lock_api v0.2.0
[INFO] [stderr]    Compiling piston-viewport v0.5.0
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling walkdir v2.2.9
[INFO] [stderr]    Compiling inflate v0.3.4
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling gif v0.9.2
[INFO] [stderr]    Compiling gif v0.10.2
[INFO] [stderr]    Compiling cmake v0.1.41
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling crossbeam-channel v0.3.9
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling getrandom v0.1.8
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr]    Compiling stb_truetype v0.2.6
[INFO] [stderr]    Compiling rustc-hash v1.0.1
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling x11-dl v2.18.3
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling ordered-float v1.0.2
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling line_drawing v0.7.0
[INFO] [stderr]    Compiling pennereq v0.3.0
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling daggy v0.5.0
[INFO] [stderr]    Compiling daggy v0.6.0
[INFO] [stderr]    Compiling dlib v0.4.1
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]    Compiling shaderc-sys v0.5.1
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling rand v0.3.23
[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-0.14.1/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=569bbe6beaf422ea -C extra-filename=-569bbe6beaf422ea --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-7d02ad3c39680c92.rmeta --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-083c1e57c0910289.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-24671ede337b9823.rmeta --extern void=/opt/rustwide/target/debug/deps/libvoid-daee20f73a082eaf.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] The following warnings were emitted during compilation:
[INFO] [stderr] 
[INFO] [stderr] warning: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
[INFO] [stderr] warning: Pre-built library not found.  Falling back to from-source build
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3b2efdc26c7e080f83f3c092baa655e61a154cc3cb35b85f2b24fd4e0bb38efb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b2efdc26c7e080f83f3c092baa655e61a154cc3cb35b85f2b24fd4e0bb38efb", kill_on_drop: false }`
[INFO] [stdout] 3b2efdc26c7e080f83f3c092baa655e61a154cc3cb35b85f2b24fd4e0bb38efb