[INFO] fetching crate wtf-rlsr 1.1.1...
[INFO] documenting wtf-rlsr-1.1.1 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate wtf-rlsr 1.1.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate wtf-rlsr 1.1.1 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 wtf-rlsr 1.1.1
[INFO] finished tweaking crates.io crate wtf-rlsr 1.1.1
[INFO] tweaked toml for crates.io crate wtf-rlsr 1.1.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate wtf-rlsr 1.1.1 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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 1d6c1e346c7b173be37da4745b696ccfebd3a40117ee6976a32c8943380901bc
[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" "1d6c1e346c7b173be37da4745b696ccfebd3a40117ee6976a32c8943380901bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d6c1e346c7b173be37da4745b696ccfebd3a40117ee6976a32c8943380901bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d6c1e346c7b173be37da4745b696ccfebd3a40117ee6976a32c8943380901bc", kill_on_drop: false }`
[INFO] [stdout] 1d6c1e346c7b173be37da4745b696ccfebd3a40117ee6976a32c8943380901bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] a7cc5c29836d50e77596b4939471dcc71de0e1a3e94ca45f8383c88584b84dab
[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" "a7cc5c29836d50e77596b4939471dcc71de0e1a3e94ca45f8383c88584b84dab", kill_on_drop: false }`
[INFO] [stderr]    Compiling curl v0.4.25
[INFO] [stderr]     Checking opener v0.4.1
[INFO] [stderr]     Checking rustc-workspace-hack v1.0.0
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking shell-escape v0.1.4
[INFO] [stderr]     Checking home v0.5.1
[INFO] [stderr]     Checking fs_extra v1.1.0
[INFO] [stderr]     Checking pathdiff v0.1.0
[INFO] [stderr]     Checking unicode-normalization v0.1.11
[INFO] [stderr]     Checking miniz_oxide v0.3.5
[INFO] [stderr]    Compiling num_cpus v1.11.1
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]     Checking socket2 v0.3.11
[INFO] [stderr]     Checking filetime v0.2.8
[INFO] [stderr]    Compiling jobserver v0.1.17
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking colored v1.9.1
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking sized-chunks v0.3.1
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking console v0.9.1
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]     Checking tar v0.4.26
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling syn-mid v0.4.0
[INFO] [stderr]    Compiling rustversion v1.0.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking cargo-platform v0.1.0
[INFO] [stderr]     Checking toml v0.5.5
[INFO] [stderr]     Checking serde_ignored v0.1.1
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking globset v0.4.4
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]     Checking ignore v0.4.10
[INFO] [stderr]     Checking url v2.1.0
[INFO] [stderr]     Checking pretty_env_logger v0.3.1
[INFO] [stderr]    Compiling openssl-sys v0.9.53
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling libssh2-sys v0.2.13
[INFO] [stderr]    Compiling curl-sys v0.4.24
[INFO] [stderr]    Compiling libgit2-sys v0.9.2
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]    Compiling const-random-macro v0.1.6
[INFO] [stderr]     Checking dialoguer v0.5.0
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]    Compiling proc-macro-error v0.4.4
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.3
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]    Compiling openssl v0.10.26
[INFO] [stderr]     Checking const-random v0.1.6
[INFO] [stderr]     Checking ahash v0.2.18
[INFO] [stderr]     Checking hashbrown v0.6.3
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking rustfix v0.4.6
[INFO] [stderr]     Checking which v3.1.0
[INFO] [stderr]    Compiling structopt-derive v0.4.0
[INFO] [stderr]     Checking crates-io v0.29.0
[INFO] [stderr]     Checking crypto-hash v0.3.4
[INFO] [stderr]     Checking git2 v0.10.2
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking structopt v0.3.7
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling im-rc v13.0.0
[INFO] [stderr]     Checking git2-curl v0.11.0
[INFO] [stderr]     Checking cargo v0.41.0
[INFO] [stderr]  Documenting wtf-rlsr v1.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(str_strip, try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `wtf-rlsr`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name wtf_rlsr src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern cargo=/opt/rustwide/target/debug/deps/libcargo-611c55770b3b079d.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-cd9a31058d590b96.rmeta --extern console=/opt/rustwide/target/debug/deps/libconsole-5651bb088dcaa2ce.rmeta --extern dialoguer=/opt/rustwide/target/debug/deps/libdialoguer-0424423043cce0a1.rmeta --extern dirs=/opt/rustwide/target/debug/deps/libdirs-05d656eaec448d28.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-4e5a1cafb983d9b4.rmeta --extern fs_extra=/opt/rustwide/target/debug/deps/libfs_extra-fe3d86b5c15bcde3.rmeta --extern git2=/opt/rustwide/target/debug/deps/libgit2-7dfd5df19b86518c.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-91c2b32d0ceb9511.rmeta --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-379d9aab1beb6f2e.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f96ba0118540bef9.rmeta --extern pathdiff=/opt/rustwide/target/debug/deps/libpathdiff-afc3c1be3de7f110.rmeta --extern pretty_env_logger=/opt/rustwide/target/debug/deps/libpretty_env_logger-55d73e6c816083cf.rmeta --extern semver=/opt/rustwide/target/debug/deps/libsemver-499e566a71d69dad.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-e2bf6edcbf83f4e1.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-c56360160a93044f.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-15051abb3cad9861.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-76ca5728173d3dc6.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-e8bbe717253d201e.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-ef6270ddd40211ad.rmeta --extern which=/opt/rustwide/target/debug/deps/libwhich-3523da87bf638e40.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "a7cc5c29836d50e77596b4939471dcc71de0e1a3e94ca45f8383c88584b84dab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7cc5c29836d50e77596b4939471dcc71de0e1a3e94ca45f8383c88584b84dab", kill_on_drop: false }`
[INFO] [stdout] a7cc5c29836d50e77596b4939471dcc71de0e1a3e94ca45f8383c88584b84dab