[INFO] fetching crate webb-bulletproofs 2.0.3...
[INFO] documenting webb-bulletproofs-2.0.3 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate webb-bulletproofs 2.0.3 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate webb-bulletproofs 2.0.3 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-1/source/rust-toolchain
[INFO] started tweaking crates.io crate webb-bulletproofs 2.0.3
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate webb-bulletproofs 2.0.3
[INFO] tweaked toml for crates.io crate webb-bulletproofs 2.0.3 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c66d4adf29b0e650abc297a9e5ed5f761044e883de143016d76085ab9a0578e
[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" "3c66d4adf29b0e650abc297a9e5ed5f761044e883de143016d76085ab9a0578e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c66d4adf29b0e650abc297a9e5ed5f761044e883de143016d76085ab9a0578e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c66d4adf29b0e650abc297a9e5ed5f761044e883de143016d76085ab9a0578e", kill_on_drop: false }`
[INFO] [stdout] 3c66d4adf29b0e650abc297a9e5ed5f761044e883de143016d76085ab9a0578e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 74c98609fd62bbdba59c56847346bdfcd10c169af741cb7802bcda8b930d162f
[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" "74c98609fd62bbdba59c56847346bdfcd10c169af741cb7802bcda8b930d162f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]     Checking block-padding v0.2.1
[INFO] [stderr]     Checking keccak v0.1.2
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling clear_on_drop v0.2.5
[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/clear_on_drop-0.2.5/src/lib.rs:2:34
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![cfg_attr(feature = "nightly", feature(min_specialization))]
[INFO] [stdout]   |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `clear_on_drop` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "74c98609fd62bbdba59c56847346bdfcd10c169af741cb7802bcda8b930d162f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74c98609fd62bbdba59c56847346bdfcd10c169af741cb7802bcda8b930d162f", kill_on_drop: false }`
[INFO] [stdout] 74c98609fd62bbdba59c56847346bdfcd10c169af741cb7802bcda8b930d162f