[INFO] fetching crate pom 3.2.0...
[INFO] checking pom-3.2.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate pom 3.2.0 into /workspace/builds/worker-116/source
[INFO] validating manifest of crates.io crate pom 3.2.0 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pom 3.2.0
[INFO] finished tweaking crates.io crate pom 3.2.0
[INFO] tweaked toml for crates.io crate pom 3.2.0 written to /workspace/builds/worker-116/source/Cargo.toml
[INFO] crate crates.io crate pom 3.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a749f2f9f9bb9280da99b5aef9338fdf10d5638df01c6277445a734421f34891
[INFO] running `Command { std: "docker" "start" "-a" "a749f2f9f9bb9280da99b5aef9338fdf10d5638df01c6277445a734421f34891", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a749f2f9f9bb9280da99b5aef9338fdf10d5638df01c6277445a734421f34891", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a749f2f9f9bb9280da99b5aef9338fdf10d5638df01c6277445a734421f34891", kill_on_drop: false }`
[INFO] [stdout] a749f2f9f9bb9280da99b5aef9338fdf10d5638df01c6277445a734421f34891
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4b8a8c7410ab0d5c1edcdbeee5800d2cfdd2ffa2d9cbd4d4aeaecb873ce5f11b
[INFO] running `Command { std: "docker" "start" "-a" "4b8a8c7410ab0d5c1edcdbeee5800d2cfdd2ffa2d9cbd4d4aeaecb873ce5f11b", kill_on_drop: false }`
[INFO] [stderr]     Checking pom v3.2.0 (/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] 78 | |         whitespace() *
[INFO] [stdout]    | |________^
[INFO] [stdout] ...
[INFO] [stdout] 82 |           )
[INFO] [stdout]    |  __________^
[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 `Result` that must be used
[INFO] [stdout]   --> examples/json_file.rs:75:2
[INFO] [stdout]    |
[INFO] [stdout] 75 |     file.read_to_end(&mut input);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `Command { std: "docker" "inspect" "4b8a8c7410ab0d5c1edcdbeee5800d2cfdd2ffa2d9cbd4d4aeaecb873ce5f11b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b8a8c7410ab0d5c1edcdbeee5800d2cfdd2ffa2d9cbd4d4aeaecb873ce5f11b", kill_on_drop: false }`
[INFO] [stdout] 4b8a8c7410ab0d5c1edcdbeee5800d2cfdd2ffa2d9cbd4d4aeaecb873ce5f11b