[INFO] fetching crate playbook 0.4.2...
[INFO] documenting playbook-0.4.2 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate playbook 0.4.2 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate playbook 0.4.2 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate playbook 0.4.2
[INFO] finished tweaking crates.io crate playbook 0.4.2
[INFO] tweaked toml for crates.io crate playbook 0.4.2 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "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 impersonate v0.0.3
[INFO] [stderr]   Downloaded mashup-impl v0.1.12
[INFO] [stderr]   Downloaded mashup v0.1.12
[INFO] [stderr]   Downloaded rpds v0.5.0
[INFO] [stderr]   Downloaded pyo3-derive-backend v0.5.4
[INFO] [stderr]   Downloaded pyo3cls v0.5.4
[INFO] [stderr]   Downloaded ymlctx v0.1.8
[INFO] [stderr]   Downloaded pyo3 v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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-2020-10-09" "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] c1a0ded2d5eafeb464c951b3208d36df2b58499a24669e74337645e734c2b6f5
[INFO] running `Command { std: "docker" "start" "-a" "c1a0ded2d5eafeb464c951b3208d36df2b58499a24669e74337645e734c2b6f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1a0ded2d5eafeb464c951b3208d36df2b58499a24669e74337645e734c2b6f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1a0ded2d5eafeb464c951b3208d36df2b58499a24669e74337645e734c2b6f5", kill_on_drop: false }`
[INFO] [stdout] c1a0ded2d5eafeb464c951b3208d36df2b58499a24669e74337645e734c2b6f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc4f120d52e64e753d8876c914b3526330c451f6008f66392ea4c982260cb0e8
[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" "fc4f120d52e64e753d8876c914b3526330c451f6008f66392ea4c982260cb0e8", kill_on_drop: false }`
[INFO] [stderr]    Compiling impersonate v0.0.3
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking rpds v0.5.0
[INFO] [stderr]     Checking fern v0.5.9
[INFO] [stderr]     Checking ymlctx v0.1.8
[INFO] [stderr]     Checking playbook v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting playbook v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/lang/python.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result::Result`
[INFO] [stdout]  --> src/lang/python.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::result::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Context`, `CtxObj`
[INFO] [stdout]  --> src/lang/python.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ymlctx::context::{Context, CtxObj};
[INFO] [stdout]   |                       ^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TaskErrorSource`, `TaskError`
[INFO] [stdout]  --> src/lang/python.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::{TaskError, TaskErrorSource};
[INFO] [stdout]   |             ^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/lang/python.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::Write; // for flushing stdio
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/builtins.rs:277:5
[INFO] [stdout]     |
[INFO] [stdout] 276 |     unimplemented!();
[INFO] [stdout]     |     ----------------- any code following this expression is unreachable
[INFO] [stdout] 277 |     let nproc = pool.len();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right`: superseded by `trim_end`
[INFO] [stdout]   --> src/systems/docker.rs:38:33
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let newline_len = id_stdout.trim_right().len();
[INFO] [stdout]    |                                 ^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nproc`
[INFO] [stdout]    --> src/builtins.rs:277:9
[INFO] [stdout]     |
[INFO] [stdout] 277 |     let nproc = pool.len();
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_nproc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grid`
[INFO] [stdout]    --> src/builtins.rs:275:14
[INFO] [stdout]     |
[INFO] [stdout] 275 | fn fork_pool(grid: Vec<Context>, pool: &Vec<CtxObj>) -> TransientContext {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pool`
[INFO] [stdout]    --> src/builtins.rs:275:34
[INFO] [stdout]     |
[INFO] [stdout] 275 | fn fork_pool(grid: Vec<Context>, pool: &Vec<CtxObj>) -> TransientContext {
[INFO] [stdout]     |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_pool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.44s
[INFO] running `Command { std: "docker" "inspect" "fc4f120d52e64e753d8876c914b3526330c451f6008f66392ea4c982260cb0e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc4f120d52e64e753d8876c914b3526330c451f6008f66392ea4c982260cb0e8", kill_on_drop: false }`
[INFO] [stdout] fc4f120d52e64e753d8876c914b3526330c451f6008f66392ea4c982260cb0e8
