[INFO] cloning repository https://github.com/Baranowski/stacktraceflow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Baranowski/stacktraceflow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBaranowski%2Fstacktraceflow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBaranowski%2Fstacktraceflow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e314f710c8d69829f051a3bf3fbeebb4ee13e72d
[INFO] documenting Baranowski/stacktraceflow 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%2FBaranowski%2Fstacktraceflow" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Baranowski/stacktraceflow 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/Baranowski/stacktraceflow
[INFO] finished tweaking git repo https://github.com/Baranowski/stacktraceflow
[INFO] tweaked toml for git repo https://github.com/Baranowski/stacktraceflow written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/Baranowski/stacktraceflow 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]     Updating git repository `https://github.com/BonsaiDen/cursive_tree_view`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded enumset v0.4.2
[INFO] [stderr]   Downloaded enumset_derive v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 39755198c45f4fe69095bd9ef6f63bb18326fef3feb3fd12eb692e2e912b13f0
[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" "39755198c45f4fe69095bd9ef6f63bb18326fef3feb3fd12eb692e2e912b13f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39755198c45f4fe69095bd9ef6f63bb18326fef3feb3fd12eb692e2e912b13f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39755198c45f4fe69095bd9ef6f63bb18326fef3feb3fd12eb692e2e912b13f0", kill_on_drop: false }`
[INFO] [stdout] 39755198c45f4fe69095bd9ef6f63bb18326fef3feb3fd12eb692e2e912b13f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 87268db41879dd81685b9c275124d7eeb33ce44c92b16cfca333fe61668ca0cf
[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" "87268db41879dd81685b9c275124d7eeb33ce44c92b16cfca333fe61668ca0cf", 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] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling ncurses v5.99.0
[INFO] [stderr]    Compiling debug_stub_derive v0.3.0
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking num-complex v0.2.3
[INFO] [stderr]     Checking signal-hook-registry v1.1.1
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling enum-map-derive v0.4.3
[INFO] [stderr]     Checking num-rational v0.2.2
[INFO] [stderr]    Compiling darling_core v0.9.0
[INFO] [stderr]     Checking signal-hook v0.1.10
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking enum-map v0.6.1
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]    Compiling darling_macro v0.9.0
[INFO] [stderr]    Compiling darling v0.9.0
[INFO] [stderr]    Compiling enumset_derive v0.4.1
[INFO] [stderr]     Checking enumset v0.4.2
[INFO] [stderr]     Checking toml v0.5.3
[INFO] [stderr]     Checking cursive v0.13.0
[INFO] [stderr]     Checking cursive_tree_view v0.5.0 (https://github.com/BonsaiDen/cursive_tree_view#b7729427)
[INFO] [stderr]  Documenting stacktraceflow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 55.42s
[INFO] running `Command { std: "docker" "inspect" "87268db41879dd81685b9c275124d7eeb33ce44c92b16cfca333fe61668ca0cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87268db41879dd81685b9c275124d7eeb33ce44c92b16cfca333fe61668ca0cf", kill_on_drop: false }`
[INFO] [stdout] 87268db41879dd81685b9c275124d7eeb33ce44c92b16cfca333fe61668ca0cf