[INFO] cloning repository https://github.com/gskapka/rust-btc-tx-maker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gskapka/rust-btc-tx-maker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgskapka%2Frust-btc-tx-maker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgskapka%2Frust-btc-tx-maker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7b49aa264c72315c35cde6cdd3839c7145551c1e
[INFO] documenting gskapka/rust-btc-tx-maker against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgskapka%2Frust-btc-tx-maker" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gskapka/rust-btc-tx-maker on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gskapka/rust-btc-tx-maker
[INFO] finished tweaking git repo https://github.com/gskapka/rust-btc-tx-maker
[INFO] tweaked toml for git repo https://github.com/gskapka/rust-btc-tx-maker written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/gskapka/rust-btc-tx-maker already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.46.0" "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] 2519f5455cb80aee08cdfb5c5b968b87372a92f9abed06f9d92cb3d1c6e5d33e
[INFO] running `Command { std: "docker" "start" "-a" "2519f5455cb80aee08cdfb5c5b968b87372a92f9abed06f9d92cb3d1c6e5d33e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2519f5455cb80aee08cdfb5c5b968b87372a92f9abed06f9d92cb3d1c6e5d33e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2519f5455cb80aee08cdfb5c5b968b87372a92f9abed06f9d92cb3d1c6e5d33e", kill_on_drop: false }`
[INFO] [stdout] 2519f5455cb80aee08cdfb5c5b968b87372a92f9abed06f9d92cb3d1c6e5d33e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e81d170d3ee2ace79352b51db492286cb6968902e8ae125c7b36b31e4f5b5d4
[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" "9e81d170d3ee2ace79352b51db492286cb6968902e8ae125c7b36b31e4f5b5d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling openssl v0.10.26
[INFO] [stderr]     Checking bitcoin_hashes v0.7.3
[INFO] [stderr]     Checking bech32 v0.7.1
[INFO] [stderr]     Checking strsim v0.9.3
[INFO] [stderr]     Checking hex v0.4.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling secp256k1 v0.15.0
[INFO] [stderr]     Checking try_from v0.3.2
[INFO] [stderr]    Compiling openssl-sys v0.9.53
[INFO] [stderr]     Checking lock_api v0.3.2
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]     Checking tokio-executor v0.1.9
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking tokio-timer v0.2.12
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking publicsuffix v1.5.4
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking mime_guess v2.0.1
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking tokio-threadpool v0.1.17
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking simplelog v0.7.4
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]     Checking tokio-reactor v0.1.11
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking bitcoin v0.21.0
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking docopt v1.1.0
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stderr]  Documenting bitcoff v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 document `bitcoff`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name bitcoff src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bitcoin=/opt/rustwide/target/debug/deps/libbitcoin-2c9c2991ee1eea75.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-6d64c9de8ec8b357.rmeta --extern docopt=/opt/rustwide/target/debug/deps/libdocopt-c58ebd1fbc24d54b.rmeta --extern hex=/opt/rustwide/target/debug/deps/libhex-4ea69696b6139a1c.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f96ba0118540bef9.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-54f066910300b932.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-86a8d3a9ca12ff6c.rmeta --extern secp256k1=/opt/rustwide/target/debug/deps/libsecp256k1-d4c595a6d440e861.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-93c8353adf26e24d.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-a0b47ced0033a2bd.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-9062af8cb1970f3e.rmeta --extern simplelog=/opt/rustwide/target/debug/deps/libsimplelog-935d634857f8da09.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "9e81d170d3ee2ace79352b51db492286cb6968902e8ae125c7b36b31e4f5b5d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e81d170d3ee2ace79352b51db492286cb6968902e8ae125c7b36b31e4f5b5d4", kill_on_drop: false }`
[INFO] [stdout] 9e81d170d3ee2ace79352b51db492286cb6968902e8ae125c7b36b31e4f5b5d4