[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 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBaranowski%2Fstacktraceflow" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Baranowski/stacktraceflow on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-4/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" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded enumset_derive v0.4.1
[INFO] [stderr]   Downloaded enumset v0.4.2
[INFO] [stderr]   Downloaded cursive v0.13.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ffd077e68dd604172e7bef022e5afe53b585d632935476338bc0a32c9c09b021
[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" "ffd077e68dd604172e7bef022e5afe53b585d632935476338bc0a32c9c09b021", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ffd077e68dd604172e7bef022e5afe53b585d632935476338bc0a32c9c09b021", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffd077e68dd604172e7bef022e5afe53b585d632935476338bc0a32c9c09b021", kill_on_drop: false }`
[INFO] [stdout] ffd077e68dd604172e7bef022e5afe53b585d632935476338bc0a32c9c09b021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "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] 5f0760898edf58132c89371041c95dc49b004cb1cf052413d37931f6779eb1b3
[INFO] running `Command { std: "docker" "start" "-a" "5f0760898edf58132c89371041c95dc49b004cb1cf052413d37931f6779eb1b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.4
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]     Checking arc-swap v0.4.3
[INFO] [stderr]     Checking array-macro v1.0.4
[INFO] [stderr]     Checking xi-unicode v0.2.0
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]     Checking num-traits v0.2.8
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]    Compiling debug_stub_derive v0.3.0
[INFO] [stderr]    Compiling darling_core v0.9.0
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking signal-hook-registry v1.1.1
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]     Checking signal-hook v0.1.10
[INFO] [stderr]    Compiling ncurses v5.99.0
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling darling_macro v0.9.0
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]    Compiling darling v0.9.0
[INFO] [stderr]    Compiling enumset_derive v0.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling enum-map-derive v0.4.3
[INFO] [stderr]     Checking enumset v0.4.2
[INFO] [stderr]     Checking enum-map v0.6.1
[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 31.03s
[INFO] running `Command { std: "docker" "inspect" "5f0760898edf58132c89371041c95dc49b004cb1cf052413d37931f6779eb1b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f0760898edf58132c89371041c95dc49b004cb1cf052413d37931f6779eb1b3", kill_on_drop: false }`
[INFO] [stdout] 5f0760898edf58132c89371041c95dc49b004cb1cf052413d37931f6779eb1b3