[INFO] fetching crate duo 0.1.0-alpha.0...
[INFO] testing duo-0.1.0-alpha.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate duo 0.1.0-alpha.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate duo 0.1.0-alpha.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate duo 0.1.0-alpha.0
[INFO] finished tweaking crates.io crate duo 0.1.0-alpha.0
[INFO] tweaked toml for crates.io crate duo 0.1.0-alpha.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cc v1.0.26
[INFO] [stderr]   Downloaded numext-fixed-hash v0.1.6
[INFO] [stderr]   Downloaded numext-fixed-hash-core v0.1.6
[INFO] [stderr]   Downloaded secp256k1 v0.12.2
[INFO] [stderr]   Downloaded numext-fixed-hash-hack v0.1.6
[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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", 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] 45daec110dedcfec9bf1e51e4aba4b4a855af16fa07237ea9629a0752e722574
[INFO] running `Command { std: "docker" "start" "-a" "45daec110dedcfec9bf1e51e4aba4b4a855af16fa07237ea9629a0752e722574", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45daec110dedcfec9bf1e51e4aba4b4a855af16fa07237ea9629a0752e722574", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45daec110dedcfec9bf1e51e4aba4b4a855af16fa07237ea9629a0752e722574", kill_on_drop: false }`
[INFO] [stdout] 45daec110dedcfec9bf1e51e4aba4b4a855af16fa07237ea9629a0752e722574
[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=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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b9caa9340751d865a50c3762266597653b8f6ddeecfed24ecbfe5314124c161
[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" "0b9caa9340751d865a50c3762266597653b8f6ddeecfed24ecbfe5314124c161", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling adler v0.2.3
[INFO] [stderr]    Compiling gimli v0.23.0
[INFO] [stderr]    Compiling cc v1.0.26
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.18
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling object v0.22.0
[INFO] [stderr]    Compiling futures v0.1.30
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling secp256k1 v0.12.2
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling addr2line v0.14.1
[INFO] [stderr]    Compiling backtrace v0.3.55
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]    Compiling numext-constructor v0.1.6
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling thiserror v1.0.23
[INFO] [stderr]    Compiling numext-fixed-uint-core v0.1.6
[INFO] [stderr]    Compiling numext-fixed-uint-hack v0.1.6
[INFO] [stderr]    Compiling numext-fixed-uint v0.1.6
[INFO] [stderr]    Compiling numext-fixed-hash-core v0.1.6
[INFO] [stderr] error: could not compile `numext-fixed-hash-core`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name numext_fixed_hash_core --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/numext-fixed-hash-core-0.1.6/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 --cfg 'feature="bits_1024"' --cfg 'feature="bits_128"' --cfg 'feature="bits_160"' --cfg 'feature="bits_2048"' --cfg 'feature="bits_224"' --cfg 'feature="bits_256"' --cfg 'feature="bits_384"' --cfg 'feature="bits_4096"' --cfg 'feature="bits_512"' --cfg 'feature="bits_520"' --cfg 'feature="bits_all"' --cfg 'feature="default"' -C metadata=62d904b72455a54c -C extra-filename=-62d904b72455a54c --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern constructor=/opt/rustwide/target/debug/deps/libnumext_constructor-0cf90eb2da3971c9.so --extern nfuint=/opt/rustwide/target/debug/deps/libnumext_fixed_uint-1cae803c93bab56e.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-41aaf28ebe03bcc4.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "0b9caa9340751d865a50c3762266597653b8f6ddeecfed24ecbfe5314124c161", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b9caa9340751d865a50c3762266597653b8f6ddeecfed24ecbfe5314124c161", kill_on_drop: false }`
[INFO] [stdout] 0b9caa9340751d865a50c3762266597653b8f6ddeecfed24ecbfe5314124c161