[INFO] fetching crate mpris 2.0.0-rc2...
[INFO] documenting mpris-2.0.0-rc2 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate mpris 2.0.0-rc2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate mpris 2.0.0-rc2 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mpris 2.0.0-rc2
[INFO] finished tweaking crates.io crate mpris 2.0.0-rc2
[INFO] tweaked toml for crates.io crate mpris 2.0.0-rc2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate mpris 2.0.0-rc2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51a88fcee92c7a1dafce791a096db94e7fd9782bdc62ba633cc81f356f00aaf5
[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" "51a88fcee92c7a1dafce791a096db94e7fd9782bdc62ba633cc81f356f00aaf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51a88fcee92c7a1dafce791a096db94e7fd9782bdc62ba633cc81f356f00aaf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51a88fcee92c7a1dafce791a096db94e7fd9782bdc62ba633cc81f356f00aaf5", kill_on_drop: false }`
[INFO] [stdout] 51a88fcee92c7a1dafce791a096db94e7fd9782bdc62ba633cc81f356f00aaf5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd52f297bbdf401d28e729bca8a05b7dc316d4e1a0586ca72e45a65dbe0ad0cc
[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" "fd52f297bbdf401d28e729bca8a05b7dc316d4e1a0586ca72e45a65dbe0ad0cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling cc v1.0.20
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling pkg-config v0.3.13
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]     Checking rustc-demangle v0.1.9
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling derive_is_enum_variant v0.1.1
[INFO] [stderr]    Compiling libdbus-sys v0.2.1
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]     Checking dbus v0.8.1
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]    Compiling enum-kinds v0.4.1
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling darling_core v0.5.0
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]    Compiling darling_macro v0.5.0
[INFO] [stderr]    Compiling darling v0.5.0
[INFO] [stderr]    Compiling from_variants_impl v0.4.0
[INFO] [stderr]     Checking from_variants v0.4.0
[INFO] [stderr]  Documenting mpris v2.0.0-rc2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.20s
[INFO] running `Command { std: "docker" "inspect" "fd52f297bbdf401d28e729bca8a05b7dc316d4e1a0586ca72e45a65dbe0ad0cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd52f297bbdf401d28e729bca8a05b7dc316d4e1a0586ca72e45a65dbe0ad0cc", kill_on_drop: false }`
[INFO] [stdout] fd52f297bbdf401d28e729bca8a05b7dc316d4e1a0586ca72e45a65dbe0ad0cc