[INFO] fetching crate pretty_backtrace 0.1.2...
[INFO] documenting pretty_backtrace-0.1.2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate pretty_backtrace 0.1.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate pretty_backtrace 0.1.2 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 pretty_backtrace 0.1.2
[INFO] finished tweaking crates.io crate pretty_backtrace 0.1.2
[INFO] tweaked toml for crates.io crate pretty_backtrace 0.1.2 written to /workspace/builds/worker-1/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]  Downloading crates ...
[INFO] [stderr]   Downloaded lazycell v1.3.0
[INFO] [stderr]   Downloaded proc-macro2 v0.3.5
[INFO] [stderr]   Downloaded xml-rs v0.8.3
[INFO] [stderr]   Downloaded quote v0.5.2
[INFO] [stderr]   Downloaded onig v4.3.3
[INFO] [stderr]   Downloaded plist v0.4.2
[INFO] [stderr]   Downloaded onig_sys v69.1.0
[INFO] [stderr]   Downloaded object v0.12.0
[INFO] [stderr]   Downloaded cpp_demangle v0.2.16
[INFO] [stderr]   Downloaded intervaltree v0.2.6
[INFO] [stderr]   Downloaded goblin v0.0.22
[INFO] [stderr]   Downloaded findshlibs v0.4.1
[INFO] [stderr]   Downloaded parity-wasm v0.38.0
[INFO] [stderr]   Downloaded syntect v3.2.0
[INFO] [stderr]   Downloaded addr2line v0.9.0
[INFO] [stderr]   Downloaded clang-sys v0.23.0
[INFO] [stderr]   Downloaded gimli v0.18.0
[INFO] [stderr]   Downloaded bindgen v0.39.0
[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" "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] 90d430477c865bdf59ee09ea454b0e1450e9b1d9faa4eeee33b60d511b7a03d2
[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" "90d430477c865bdf59ee09ea454b0e1450e9b1d9faa4eeee33b60d511b7a03d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90d430477c865bdf59ee09ea454b0e1450e9b1d9faa4eeee33b60d511b7a03d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90d430477c865bdf59ee09ea454b0e1450e9b1d9faa4eeee33b60d511b7a03d2", kill_on_drop: false }`
[INFO] [stdout] 90d430477c865bdf59ee09ea454b0e1450e9b1d9faa4eeee33b60d511b7a03d2
[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" "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] 7b2ffa2d70dcafe88c697e056942a7731a6bb615258465be67b952d5561bf730
[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" "7b2ffa2d70dcafe88c697e056942a7731a6bb615258465be67b952d5561bf730", kill_on_drop: false }`
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking parity-wasm v0.38.0
[INFO] [stderr]    Compiling cpp_demangle v0.2.16
[INFO] [stderr]    Compiling onig_sys v69.1.0
[INFO] [stderr]     Checking line-wrap v0.1.1
[INFO] [stderr]     Checking intervaltree v0.2.6
[INFO] [stderr]    Compiling findshlibs v0.4.1
[INFO] [stderr]     Checking flate2 v1.0.17
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling rental-impl v0.5.5
[INFO] [stderr]     Checking scroll v0.9.2
[INFO] [stderr]     Checking gimli v0.18.0
[INFO] [stderr]     Checking plist v0.4.2
[INFO] [stderr]     Checking goblin v0.0.22
[INFO] [stderr]     Checking onig v4.3.3
[INFO] [stderr]     Checking syntect v3.2.0
[INFO] [stderr]     Checking object v0.12.0
[INFO] [stderr]     Checking addr2line v0.9.0
[INFO] [stderr]     Checking rental v0.5.5
[INFO] [stderr]  Documenting pretty_backtrace v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.13s
[INFO] running `Command { std: "docker" "inspect" "7b2ffa2d70dcafe88c697e056942a7731a6bb615258465be67b952d5561bf730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b2ffa2d70dcafe88c697e056942a7731a6bb615258465be67b952d5561bf730", kill_on_drop: false }`
[INFO] [stdout] 7b2ffa2d70dcafe88c697e056942a7731a6bb615258465be67b952d5561bf730