[INFO] fetching crate cargo-semverver 0.34.0...
[INFO] documenting cargo-semverver-0.34.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate cargo-semverver 0.34.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate cargo-semverver 0.34.0 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 cargo-semverver 0.34.0
[INFO] finished tweaking crates.io crate cargo-semverver 0.34.0
[INFO] tweaked toml for crates.io crate cargo-semverver 0.34.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proptest v0.8.7
[INFO] [stderr]   Downloaded crates-io-semverver v0.22.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 6de8e1358d0e894bb69ab53a15d746f1f7d35c53c13fa6fe36708d4a59f9cf8c
[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" "6de8e1358d0e894bb69ab53a15d746f1f7d35c53c13fa6fe36708d4a59f9cf8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6de8e1358d0e894bb69ab53a15d746f1f7d35c53c13fa6fe36708d4a59f9cf8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6de8e1358d0e894bb69ab53a15d746f1f7d35c53c13fa6fe36708d4a59f9cf8c", kill_on_drop: false }`
[INFO] [stdout] 6de8e1358d0e894bb69ab53a15d746f1f7d35c53c13fa6fe36708d4a59f9cf8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 76c4bc42d1ebdd123df824d56ff2bf42bbfff08bd02fb5d3cd922c1215ee9d50
[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" "76c4bc42d1ebdd123df824d56ff2bf42bbfff08bd02fb5d3cd922c1215ee9d50", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling curl v0.4.33
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking bytesize v1.0.1
[INFO] [stderr]     Checking home v0.3.4
[INFO] [stderr]     Checking rustc-workspace-hack v1.0.0
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.4+1.41.0
[INFO] [stderr]    Compiling curl-sys v0.4.36+curl-7.71.1
[INFO] [stderr]    Compiling libssh2-sys v0.2.19
[INFO] [stderr]    Compiling libgit2-sys v0.7.11
[INFO] [stderr]     Checking jobserver v0.1.21
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking sized-chunks v0.1.3
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking flate2 v1.0.17
[INFO] [stderr]     Checking crypto-hash v0.3.4
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]     Checking serde_ignored v0.0.4
[INFO] [stderr]     Checking url_serde v0.2.0
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking opener v0.3.2
[INFO] [stderr]     Checking globset v0.4.5
[INFO] [stderr]     Checking ignore v0.4.16
[INFO] [stderr]     Checking rustfix v0.4.6
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling im-rc v12.3.4
[INFO] [stderr]     Checking crates-io-semverver v0.22.0
[INFO] [stderr]     Checking git2 v0.8.0
[INFO] [stderr]     Checking git2-curl v0.9.0
[INFO] [stderr]  Documenting cargo-semverver v0.34.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: could not parse code block as Rust code
[INFO] [stdout]   --> src/cargo/core/compiler/layout.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 6  |   //! ```ignore
[INFO] [stdout]    |  _____^
[INFO] [stdout] 7  | | //! # This is the root directory for all output, the top-level package
[INFO] [stdout] 8  | | //! # places all of its output here.
[INFO] [stdout] 9  | | //! target/
[INFO] [stdout] ...  |
[INFO] [stdout] 49 | | //!     .fingerprint/
[INFO] [stdout] 50 | | //! ```
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: error from rustc: unknown start of token: `
[INFO] [stdout]    = note: error from rustc: unknown start of token: `
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 24s
[INFO] running `Command { std: "docker" "inspect" "76c4bc42d1ebdd123df824d56ff2bf42bbfff08bd02fb5d3cd922c1215ee9d50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76c4bc42d1ebdd123df824d56ff2bf42bbfff08bd02fb5d3cd922c1215ee9d50", kill_on_drop: false }`
[INFO] [stdout] 76c4bc42d1ebdd123df824d56ff2bf42bbfff08bd02fb5d3cd922c1215ee9d50