[INFO] fetching crate nkeys 0.0.9...
[INFO] documenting nkeys-0.0.9 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate nkeys 0.0.9 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate nkeys 0.0.9 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 nkeys 0.0.9
[INFO] finished tweaking crates.io crate nkeys 0.0.9
[INFO] tweaked toml for crates.io crate nkeys 0.0.9 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate nkeys 0.0.9 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]  Downloading crates ...
[INFO] [stderr]   Downloaded signatory-dalek v0.18.1
[INFO] [stderr]   Downloaded exitfailure v0.5.1
[INFO] [stderr]   Downloaded ed25519 v1.0.0-pre.1
[INFO] [stderr]   Downloaded clap-verbosity-flag v0.2.0
[INFO] [stderr]   Downloaded signatory v0.18.1
[INFO] [stderr]   Downloaded curve25519-dalek v1.2.3
[INFO] [stderr]   Downloaded ed25519-dalek v1.0.0-pre.2
[INFO] [stderr]   Downloaded ignore v0.4.12
[INFO] [stderr]   Downloaded signature v1.0.0-pre.1
[INFO] [stderr]   Downloaded term-table v1.2.0
[INFO] [stderr]   Downloaded subtle-encoding v0.4.1
[INFO] [stderr]   Downloaded globwalk v0.3.1
[INFO] [stderr]   Downloaded quicli v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] a6defef903d12015b0a512ff1b70664dbf3db5dc527cc7a70f1046547fc10c1c
[INFO] running `Command { std: "docker" "start" "-a" "a6defef903d12015b0a512ff1b70664dbf3db5dc527cc7a70f1046547fc10c1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6defef903d12015b0a512ff1b70664dbf3db5dc527cc7a70f1046547fc10c1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6defef903d12015b0a512ff1b70664dbf3db5dc527cc7a70f1046547fc10c1c", kill_on_drop: false }`
[INFO] [stdout] a6defef903d12015b0a512ff1b70664dbf3db5dc527cc7a70f1046547fc10c1c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7a9e0cb51a420c2368fa1743d8b0444b58c25254162752b919c96bf5dd303eeb
[INFO] running `Command { std: "docker" "start" "-a" "7a9e0cb51a420c2368fa1743d8b0444b58c25254162752b919c96bf5dd303eeb", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling subtle v2.2.2
[INFO] [stderr]     Checking zeroize v1.1.0
[INFO] [stderr]     Checking failure v0.1.7
[INFO] [stderr]     Checking data-encoding v2.2.0
[INFO] [stderr]    Compiling clear_on_drop v0.2.3
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking signature v1.0.0-pre.1
[INFO] [stderr]     Checking ed25519 v1.0.0-pre.1
[INFO] [stderr]     Checking subtle-encoding v0.4.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking signatory v0.18.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling curve25519-dalek v1.2.3
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking sha2 v0.8.1
[INFO] [stderr]     Checking ed25519-dalek v1.0.0-pre.2
[INFO] [stderr]     Checking signatory-dalek v0.18.1
[INFO] [stderr]  Documenting nkeys v0.0.9 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.22s
[INFO] running `Command { std: "docker" "inspect" "7a9e0cb51a420c2368fa1743d8b0444b58c25254162752b919c96bf5dd303eeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a9e0cb51a420c2368fa1743d8b0444b58c25254162752b919c96bf5dd303eeb", kill_on_drop: false }`
[INFO] [stdout] 7a9e0cb51a420c2368fa1743d8b0444b58c25254162752b919c96bf5dd303eeb