[INFO] fetching crate otpauth-uri 1.0.2...
[INFO] documenting otpauth-uri-1.0.2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate otpauth-uri 1.0.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate otpauth-uri 1.0.2 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 otpauth-uri 1.0.2
[INFO] finished tweaking crates.io crate otpauth-uri 1.0.2
[INFO] tweaked toml for crates.io crate otpauth-uri 1.0.2 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]     Blocking waiting for file lock on package cache
[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] 1db3a5a1d1a5832638da574ae5335fabfdafe35d5bdfaa3c59011ba0c206cae6
[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" "1db3a5a1d1a5832638da574ae5335fabfdafe35d5bdfaa3c59011ba0c206cae6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1db3a5a1d1a5832638da574ae5335fabfdafe35d5bdfaa3c59011ba0c206cae6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1db3a5a1d1a5832638da574ae5335fabfdafe35d5bdfaa3c59011ba0c206cae6", kill_on_drop: false }`
[INFO] [stdout] 1db3a5a1d1a5832638da574ae5335fabfdafe35d5bdfaa3c59011ba0c206cae6
[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] 4e005bcf04d71e1e56bc5a5d11619dba6fa7764bcbd1ea73c274b25962aed130
[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" "4e005bcf04d71e1e56bc5a5d11619dba6fa7764bcbd1ea73c274b25962aed130", kill_on_drop: false }`
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]     Checking sha-1 v0.7.0
[INFO] [stderr]  Documenting otpauth-uri v1.0.2 (/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(int_to_from_bytes)]
[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(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `otpauth-uri`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name otpauth_uri 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 data_encoding=/opt/rustwide/target/debug/deps/libdata_encoding-3887957138f8c8d2.rmeta --extern hmac=/opt/rustwide/target/debug/deps/libhmac-51ad999f6eba5ac1.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-fc7387ce1268d271.rmeta --extern percent_encoding=/opt/rustwide/target/debug/deps/libpercent_encoding-22e774c759521aa5.rmeta --extern sha1=/opt/rustwide/target/debug/deps/libsha1-9f44ef07a9f71435.rmeta --extern sha2=/opt/rustwide/target/debug/deps/libsha2-6f034a045c65e80f.rmeta --cap-lints=warn --crate-version 1.0.2` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "4e005bcf04d71e1e56bc5a5d11619dba6fa7764bcbd1ea73c274b25962aed130", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e005bcf04d71e1e56bc5a5d11619dba6fa7764bcbd1ea73c274b25962aed130", kill_on_drop: false }`
[INFO] [stdout] 4e005bcf04d71e1e56bc5a5d11619dba6fa7764bcbd1ea73c274b25962aed130