[INFO] cloning repository https://github.com/ZacharyKamerling/rust_rts
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ZacharyKamerling/rust_rts" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZacharyKamerling%2Frust_rts", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZacharyKamerling%2Frust_rts'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5709ec35297d9e5c5ac21522da729eec3b46ad47
[INFO] documenting ZacharyKamerling/rust_rts against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZacharyKamerling%2Frust_rts" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ZacharyKamerling/rust_rts 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 git repo https://github.com/ZacharyKamerling/rust_rts
[INFO] finished tweaking git repo https://github.com/ZacharyKamerling/rust_rts
[INFO] tweaked toml for git repo https://github.com/ZacharyKamerling/rust_rts written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/ZacharyKamerling/rust_rts 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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ab3ca3f8452bbc359d4ef226f7f4f6d00ffe3c024d9726d76bf677c00291785d
[INFO] running `Command { std: "docker" "start" "-a" "ab3ca3f8452bbc359d4ef226f7f4f6d00ffe3c024d9726d76bf677c00291785d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab3ca3f8452bbc359d4ef226f7f4f6d00ffe3c024d9726d76bf677c00291785d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab3ca3f8452bbc359d4ef226f7f4f6d00ffe3c024d9726d76bf677c00291785d", kill_on_drop: false }`
[INFO] [stdout] ab3ca3f8452bbc359d4ef226f7f4f6d00ffe3c024d9726d76bf677c00291785d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 61865d950f0c973f8f6031288f94f593d9505c942f5aaf4b2e30c315c52592db
[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" "61865d950f0c973f8f6031288f94f593d9505c942f5aaf4b2e30c315c52592db", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.7
[INFO] [stderr]     Checking smallvec v1.1.0
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]     Checking bit-vec v0.6.1
[INFO] [stderr]     Checking time v0.2.2
[INFO] [stderr]    Compiling num-bigint v0.2.4
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]     Checking unicode-normalization v0.1.11
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking num-rational v0.2.2
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking ws v0.9.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]  Documenting rust_rts v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(plugin)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `rust_rts`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name rust_rts src/main.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bit_vec=/opt/rustwide/target/debug/deps/libbit_vec-bbb1bc601bffad4b.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-6d64c9de8ec8b357.rmeta --extern enum_primitive=/opt/rustwide/target/debug/deps/libenum_primitive-96b8dba367f5394a.rmeta --extern fnv=/opt/rustwide/target/debug/deps/libfnv-7722d5952f112cf5.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-031a4950492a5a03.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3908c3321d758a83.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-ad08fc17c2d1843f.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-b5e59298186dabe3.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-2805fd7ce45f3ead.rmeta --extern time=/opt/rustwide/target/debug/deps/libtime-3c5b67660aaa6a0e.rmeta --extern ws=/opt/rustwide/target/debug/deps/libws-13bbae7df144279f.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "61865d950f0c973f8f6031288f94f593d9505c942f5aaf4b2e30c315c52592db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61865d950f0c973f8f6031288f94f593d9505c942f5aaf4b2e30c315c52592db", kill_on_drop: false }`
[INFO] [stdout] 61865d950f0c973f8f6031288f94f593d9505c942f5aaf4b2e30c315c52592db