[INFO] cloning repository https://github.com/kanggggao/bulletproof
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kanggggao/bulletproof" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkanggggao%2Fbulletproof", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkanggggao%2Fbulletproof'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 617e4e6fea2cde7506b7e3c5596567fe66a696a9
[INFO] documenting kanggggao/bulletproof against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkanggggao%2Fbulletproof" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kanggggao/bulletproof 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 git repo https://github.com/kanggggao/bulletproof
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/kanggggao/bulletproof
[INFO] tweaked toml for git repo https://github.com/kanggggao/bulletproof written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/kanggggao/bulletproof already has a lockfile, it will not be regenerated
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded subtle v2.2.1
[INFO] [stderr]   Downloaded merlin v1.2.1
[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] [stdout] 46130d149e6b1f9a9ae729f60b611bea3ba1a15661bf3695db85a63c765a4cb6
[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" "46130d149e6b1f9a9ae729f60b611bea3ba1a15661bf3695db85a63c765a4cb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46130d149e6b1f9a9ae729f60b611bea3ba1a15661bf3695db85a63c765a4cb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46130d149e6b1f9a9ae729f60b611bea3ba1a15661bf3695db85a63c765a4cb6", kill_on_drop: false }`
[INFO] [stdout] 46130d149e6b1f9a9ae729f60b611bea3ba1a15661bf3695db85a63c765a4cb6
[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] 181e3ad0447a4cb829b1f187dd1bf77112d3fa3aad3a4486c003d7cdcb57a5d8
[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" "181e3ad0447a4cb829b1f187dd1bf77112d3fa3aad3a4486c003d7cdcb57a5d8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling subtle v2.2.1
[INFO] [stderr]    Compiling clear_on_drop v0.2.3
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking backtrace-sys v0.1.32
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking rust-crypto v0.2.36
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking merlin v1.2.1
[INFO] [stderr]     Checking sha3 v0.8.2
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling curve25519-dalek v1.2.3
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]  Documenting bulletproofs v1.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(external_doc)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![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 4 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 `bulletproofs`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name bulletproofs src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-0f95d29ff1dd04a1.rmeta --extern clear_on_drop=/opt/rustwide/target/debug/deps/libclear_on_drop-92e55dcf8aea5234.rmeta --extern curve25519_dalek=/opt/rustwide/target/debug/deps/libcurve25519_dalek-b302faaa724650fe.rmeta --extern digest=/opt/rustwide/target/debug/deps/libdigest-dced12cdb169ea52.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-159496d928db0d3e.rmeta --extern merlin=/opt/rustwide/target/debug/deps/libmerlin-fe19a81c6e95db07.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-c0e42e0b85272eea.rmeta --extern crypto=/opt/rustwide/target/debug/deps/libcrypto-c1a8ff9ee114af3b.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-1f142482ea1c10ee.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-fc87a439e4d8af58.so --extern sha3=/opt/rustwide/target/debug/deps/libsha3-79f6e38257771219.rmeta --extern subtle=/opt/rustwide/target/debug/deps/libsubtle-8ef7ef985f3ed8ad.rmeta --cap-lints=warn --crate-version 1.0.4` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "181e3ad0447a4cb829b1f187dd1bf77112d3fa3aad3a4486c003d7cdcb57a5d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "181e3ad0447a4cb829b1f187dd1bf77112d3fa3aad3a4486c003d7cdcb57a5d8", kill_on_drop: false }`
[INFO] [stdout] 181e3ad0447a4cb829b1f187dd1bf77112d3fa3aad3a4486c003d7cdcb57a5d8