[INFO] fetching crate nomos 0.1.0...
[INFO] documenting nomos-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate nomos 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate nomos 0.1.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nomos 0.1.0
[INFO] finished tweaking crates.io crate nomos 0.1.0
[INFO] tweaked toml for crates.io crate nomos 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_bytes v0.10.5
[INFO] [stderr]   Downloaded bindgen v0.46.0
[INFO] [stderr]   Downloaded wasmer-clif-backend v0.5.7
[INFO] [stderr]   Downloaded wasmparser v0.32.1
[INFO] [stderr]   Downloaded raw-cpuid v6.1.0
[INFO] [stderr]   Downloaded target-lexicon v0.4.0
[INFO] [stderr]   Downloaded blake2b_simd v0.4.1
[INFO] [stderr]   Downloaded wasmer-runtime-core v0.5.7
[INFO] [stderr]   Downloaded wasmer-runtime v0.5.7
[INFO] [stderr]   Downloaded wasmer-clif-fork-wasm v0.31.0
[INFO] [stderr]   Downloaded dynasmrt v0.3.1
[INFO] [stderr]   Downloaded wasmer-clif-fork-frontend v0.31.0
[INFO] [stderr]   Downloaded wasmer-singlepass-backend v0.5.7
[INFO] [stderr]   Downloaded cranelift-codegen-meta v0.31.0
[INFO] [stderr]   Downloaded nomos-runtime v0.1.0
[INFO] [stderr]   Downloaded serde-bench v0.0.7
[INFO] [stderr]   Downloaded cranelift-native v0.31.0
[INFO] [stderr]   Downloaded cranelift-codegen v0.31.0
[INFO] [stderr]   Downloaded cranelift-entity v0.31.0
[INFO] [stderr]   Downloaded wasmer-win-exception-handler v0.5.7
[INFO] [stderr]   Downloaded dynasm v0.3.2
[INFO] [stderr]   Downloaded cranelift-bforest v0.31.0
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "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] 54168b6cfc332564141f40cb0e6503cc2ef25adfdee5cb94ef026f02aae2db7f
[INFO] running `Command { std: "docker" "start" "-a" "54168b6cfc332564141f40cb0e6503cc2ef25adfdee5cb94ef026f02aae2db7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54168b6cfc332564141f40cb0e6503cc2ef25adfdee5cb94ef026f02aae2db7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54168b6cfc332564141f40cb0e6503cc2ef25adfdee5cb94ef026f02aae2db7f", kill_on_drop: false }`
[INFO] [stdout] 54168b6cfc332564141f40cb0e6503cc2ef25adfdee5cb94ef026f02aae2db7f
[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" "RUSTDOCFLAGS=--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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e94a795d6e08fabd6f308228e3e8d977057d15ab65775c2c6bce57b2f316f68
[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" "5e94a795d6e08fabd6f308228e3e8d977057d15ab65775c2c6bce57b2f316f68", kill_on_drop: false }`
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling cranelift-entity v0.31.0
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking wasmparser v0.32.1
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]     Checking errno v0.2.6
[INFO] [stderr]     Checking page_size v0.4.2
[INFO] [stderr]     Checking memmap v0.6.2
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]    Compiling raw-cpuid v6.1.0
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking cranelift-bforest v0.31.0
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking dynasmrt v0.3.1
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.31.0
[INFO] [stderr]    Compiling blake2b_simd v0.4.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling wasmer-runtime-core v0.5.7
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking serde-bench v0.0.7
[INFO] [stderr]     Checking serde_bytes v0.10.5
[INFO] [stderr]     Checking hashbrown v0.1.8
[INFO] [stderr]     Checking nomos-runtime v0.1.0
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling cranelift-codegen v0.31.0
[INFO] [stderr]    Compiling target-lexicon v0.4.0
[INFO] [stderr]    Compiling dynasm v0.3.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/dynasm-0.3.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/dynasm-0.3.2/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_span)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dynasm`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5e94a795d6e08fabd6f308228e3e8d977057d15ab65775c2c6bce57b2f316f68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e94a795d6e08fabd6f308228e3e8d977057d15ab65775c2c6bce57b2f316f68", kill_on_drop: false }`
[INFO] [stdout] 5e94a795d6e08fabd6f308228e3e8d977057d15ab65775c2c6bce57b2f316f68