[INFO] fetching crate feather_m0 0.7.0...
[INFO] documenting feather_m0-0.7.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate feather_m0 0.7.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate feather_m0 0.7.0 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] removed /workspace/builds/worker-8/source/.cargo/config
[INFO] started tweaking crates.io crate feather_m0 0.7.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate feather_m0 0.7.0
[INFO] tweaked toml for crates.io crate feather_m0 0.7.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate feather_m0 0.7.0 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 embedded-graphics v0.6.0
[INFO] [stderr]   Downloaded usbd-serial v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 7226569efbd6033b4182e7d8436f99c034c597a3e52d0c2387a7dff5cc477bef
[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" "7226569efbd6033b4182e7d8436f99c034c597a3e52d0c2387a7dff5cc477bef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7226569efbd6033b4182e7d8436f99c034c597a3e52d0c2387a7dff5cc477bef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7226569efbd6033b4182e7d8436f99c034c597a3e52d0c2387a7dff5cc477bef", kill_on_drop: false }`
[INFO] [stdout] 7226569efbd6033b4182e7d8436f99c034c597a3e52d0c2387a7dff5cc477bef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] d9dca443756412f4edbec9c8a9fe3eb75ac2f659d6c7d22c09cd931ff0cadb61
[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" "d9dca443756412f4edbec9c8a9fe3eb75ac2f659d6c7d22c09cd931ff0cadb61", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling cortex-m v0.6.2
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling cortex-m-rt v0.6.12
[INFO] [stderr]     Checking vcell v0.1.2
[INFO] [stderr]    Compiling atsamd21g18a v0.7.0
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]     Checking nb v0.1.2
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling feather_m0 v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]     Checking panic-halt v0.2.0
[INFO] [stderr]     Checking typenum v1.11.2
[INFO] [stderr]     Checking bare-metal v0.2.5
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]     Checking embedded-hal v0.2.3
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking as-slice v0.1.2
[INFO] [stderr]     Checking aligned v0.3.2
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling paste-impl v0.1.6
[INFO] [stderr]     Checking paste v0.1.6
[INFO] [stderr]     Checking atsamd-hal v0.9.0
[INFO] [stderr]  Documenting feather_m0 v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.66s
[INFO] running `Command { std: "docker" "inspect" "d9dca443756412f4edbec9c8a9fe3eb75ac2f659d6c7d22c09cd931ff0cadb61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9dca443756412f4edbec9c8a9fe3eb75ac2f659d6c7d22c09cd931ff0cadb61", kill_on_drop: false }`
[INFO] [stdout] d9dca443756412f4edbec9c8a9fe3eb75ac2f659d6c7d22c09cd931ff0cadb61