[INFO] fetching crate qrrs 0.1.0...
[INFO] documenting qrrs-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate qrrs 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate qrrs 0.1.0 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] started tweaking crates.io crate qrrs 0.1.0
[INFO] finished tweaking crates.io crate qrrs 0.1.0
[INFO] tweaked toml for crates.io crate qrrs 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate qrrs 0.1.0 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 bardecoder v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] e897d13f5c1b2fb3d898f8f75a679d9231b0b48298b8bb2a884fb84ad464ec61
[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" "e897d13f5c1b2fb3d898f8f75a679d9231b0b48298b8bb2a884fb84ad464ec61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e897d13f5c1b2fb3d898f8f75a679d9231b0b48298b8bb2a884fb84ad464ec61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e897d13f5c1b2fb3d898f8f75a679d9231b0b48298b8bb2a884fb84ad464ec61", kill_on_drop: false }`
[INFO] [stdout] e897d13f5c1b2fb3d898f8f75a679d9231b0b48298b8bb2a884fb84ad464ec61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 8f87349236679f3bb6c7946b16b9f76602909d3fc1e623cd91b6aba89ca3cc1a
[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" "8f87349236679f3bb6c7946b16b9f76602909d3fc1e623cd91b6aba89ca3cc1a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]     Checking checked_int_cast v1.0.0
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking num-rational v0.2.4
[INFO] [stderr]     Checking num-iter v0.1.41
[INFO] [stderr]     Checking rayon-core v1.7.1
[INFO] [stderr]     Checking tiff v0.3.1
[INFO] [stderr]     Checking png v0.15.3
[INFO] [stderr]     Checking rayon v1.3.1
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking image v0.22.5
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking bardecoder v0.2.2
[INFO] [stderr]     Checking qrcode v0.11.2
[INFO] [stderr]  Documenting qrrs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.50s
[INFO] running `Command { std: "docker" "inspect" "8f87349236679f3bb6c7946b16b9f76602909d3fc1e623cd91b6aba89ca3cc1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f87349236679f3bb6c7946b16b9f76602909d3fc1e623cd91b6aba89ca3cc1a", kill_on_drop: false }`
[INFO] [stdout] 8f87349236679f3bb6c7946b16b9f76602909d3fc1e623cd91b6aba89ca3cc1a