[INFO] fetching crate pom 3.1.0...
[INFO] checking pom-3.1.0 against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] extracting crate pom 3.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate pom 3.1.0 on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pom 3.1.0
[INFO] finished tweaking crates.io crate pom 3.1.0
[INFO] tweaked toml for crates.io crate pom 3.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate pom 3.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db005c4b5b49d235dca0716c6ff24124d0165105e3f47120961d3fa8cde852eb
[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" "db005c4b5b49d235dca0716c6ff24124d0165105e3f47120961d3fa8cde852eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db005c4b5b49d235dca0716c6ff24124d0165105e3f47120961d3fa8cde852eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db005c4b5b49d235dca0716c6ff24124d0165105e3f47120961d3fa8cde852eb", kill_on_drop: false }`
[INFO] [stdout] db005c4b5b49d235dca0716c6ff24124d0165105e3f47120961d3fa8cde852eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "RUSTFLAGS=--cap-lints=forbid" "-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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 964545a3223eaa36eb36a66c7fc1deaaeb6f03fada4988afebef4d495c6ad4db
[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" "964545a3223eaa36eb36a66c7fc1deaaeb6f03fada4988afebef4d495c6ad4db", kill_on_drop: false }`
[INFO] [stderr]     Checking pom v3.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> examples/whitespace.rs:77:2
[INFO] [stdout]    |
[INFO] [stdout] 77 |       (
[INFO] [stdout]    |  _____^
[INFO] [stdout] 78 | |         whitespace() *
[INFO] [stdout] 79 | |         list(
[INFO] [stdout] 80 | |             call(container),
[INFO] [stdout] 81 | |             whitespace()
[INFO] [stdout] 82 | |         )
[INFO] [stdout] 83 | |     )
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 77 |     whitespace() *
[INFO] [stdout] 78 |         list(
[INFO] [stdout] 79 |             call(container),
[INFO] [stdout] 80 |             whitespace()
[INFO] [stdout] 81 |         )
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `outputOk`
[INFO] [stdout]   --> examples/sandbox.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let outputOk = crlf().parse("test".as_bytes());
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_outputOk`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `outputErr`
[INFO] [stdout]   --> examples/sandbox.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let outputErr = crlf().parse(&input);
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_outputErr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputOk` should have a snake case name
[INFO] [stdout]   --> examples/sandbox.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let outputOk = crlf().parse("test".as_bytes());
[INFO] [stdout]    |         ^^^^^^^^ help: convert the identifier to snake case: `output_ok`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputErr` should have a snake case name
[INFO] [stdout]   --> examples/sandbox.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let outputErr = crlf().parse(&input);
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to snake case: `output_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.18s
[INFO] running `Command { std: "docker" "inspect" "964545a3223eaa36eb36a66c7fc1deaaeb6f03fada4988afebef4d495c6ad4db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "964545a3223eaa36eb36a66c7fc1deaaeb6f03fada4988afebef4d495c6ad4db", kill_on_drop: false }`
[INFO] [stdout] 964545a3223eaa36eb36a66c7fc1deaaeb6f03fada4988afebef4d495c6ad4db