[INFO] cloning repository https://github.com/mjptree/netsim
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mjptree/netsim" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmjptree%2Fnetsim", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmjptree%2Fnetsim'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 380f211979b9f0a55eb036e8fd7a2439dbd92110
[INFO] documenting mjptree/netsim against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmjptree%2Fnetsim" "/workspace/builds/worker-17/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-17/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mjptree/netsim on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-17/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/mjptree/netsim
[INFO] finished tweaking git repo https://github.com/mjptree/netsim
[INFO] tweaked toml for git repo https://github.com/mjptree/netsim written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] crate git repo https://github.com/mjptree/netsim already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c192952e2b1ac814290307675a5779665dbcce9c4673001cd85f629a765cdf5e
[INFO] running `Command { std: "docker" "start" "-a" "c192952e2b1ac814290307675a5779665dbcce9c4673001cd85f629a765cdf5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c192952e2b1ac814290307675a5779665dbcce9c4673001cd85f629a765cdf5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c192952e2b1ac814290307675a5779665dbcce9c4673001cd85f629a765cdf5e", kill_on_drop: false }`
[INFO] [stdout] c192952e2b1ac814290307675a5779665dbcce9c4673001cd85f629a765cdf5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a5ceace3cd61492b6071d69986ac489e010b87dfe171d592ac51a0010fbc9aa
[INFO] running `Command { std: "docker" "start" "-a" "6a5ceace3cd61492b6071d69986ac489e010b87dfe171d592ac51a0010fbc9aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling serde_derive v1.0.133
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]  Documenting netsim-gml v0.1.0 (/opt/rustwide/workdir/netsim-gml)
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling clap_derive v3.0.5
[INFO] [stderr]     Checking clap v3.0.5
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]  Documenting netsim v0.1.0 (/opt/rustwide/workdir/netsim)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> netsim/src/task.rs:33:20
[INFO] [stdout]    |
[INFO] [stdout] 33 |                 if (this.is_refill_needed()) {
[INFO] [stdout]    |                    ^                       ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 33 -                 if (this.is_refill_needed()) {
[INFO] [stdout] 33 +                 if this.is_refill_needed() {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> netsim/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(once_cell)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `netsim`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name netsim netsim/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=3809753ac1d070e6 -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-a7f75ab94bc336d1.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-aff6632ad139dd08.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-1479f2b7adeaa2b6.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-6cbaf1061831e6f7.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-c859d27a5cb10696.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-d70f6f22e82be67d.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-cc63fc60bf52954a.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "6a5ceace3cd61492b6071d69986ac489e010b87dfe171d592ac51a0010fbc9aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a5ceace3cd61492b6071d69986ac489e010b87dfe171d592ac51a0010fbc9aa", kill_on_drop: false }`
[INFO] [stdout] 6a5ceace3cd61492b6071d69986ac489e010b87dfe171d592ac51a0010fbc9aa