[INFO] fetching crate gallop 1.0.4...
[INFO] checking gallop-1.0.4 against 1.55.0 for beta-1.56-3
[INFO] extracting crate gallop 1.0.4 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate gallop 1.0.4 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gallop 1.0.4
[INFO] finished tweaking crates.io crate gallop 1.0.4
[INFO] tweaked toml for crates.io crate gallop 1.0.4 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0bfe428c8cda27f48eb312c0d779122e1b4ce5a779c55aa1a44ad063368681c
[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" "d0bfe428c8cda27f48eb312c0d779122e1b4ce5a779c55aa1a44ad063368681c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0bfe428c8cda27f48eb312c0d779122e1b4ce5a779c55aa1a44ad063368681c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0bfe428c8cda27f48eb312c0d779122e1b4ce5a779c55aa1a44ad063368681c", kill_on_drop: false }`
[INFO] [stdout] d0bfe428c8cda27f48eb312c0d779122e1b4ce5a779c55aa1a44ad063368681c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e52a2e52a53b925895210c13ba62dd3be36dd3d5fe609986c9864d7eed856e6
[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" "4e52a2e52a53b925895210c13ba62dd3be36dd3d5fe609986c9864d7eed856e6", kill_on_drop: false }`
[INFO] [stderr]     Checking gallop v1.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:570:21
[INFO] [stdout]     |
[INFO] [stdout] 570 |                 let mut current_children = children;
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:712:41
[INFO] [stdout]     |
[INFO] [stdout] 712 | ...                   let mut first_non_terminal = first_set.get_mut(non_terminal).unwrap();
[INFO] [stdout]     |                           ----^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:735:29
[INFO] [stdout]     |
[INFO] [stdout] 735 |                         let mut first_non_terminal = first_set.get_mut(non_terminal).unwrap();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:784:33
[INFO] [stdout]     |
[INFO] [stdout] 784 | ...                   let mut follow_rule_element_b = follow_set.get_mut(&b).unwrap();
[INFO] [stdout]     |                           ----^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/lib.rs:982:10
[INFO] [stdout]     |
[INFO] [stdout] 982 |         .into_iter()
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 982 |         .iter()
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 981 |     IntoIterator::into_iter(['\u{0020}', '\u{0009}','\u{000a}','\u{000c}','\u{000d}'])
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^                                                         ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:570:21
[INFO] [stdout]     |
[INFO] [stdout] 570 |                 let mut current_children = children;
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:712:41
[INFO] [stdout]     |
[INFO] [stdout] 712 | ...                   let mut first_non_terminal = first_set.get_mut(non_terminal).unwrap();
[INFO] [stdout]     |                           ----^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:735:29
[INFO] [stdout]     |
[INFO] [stdout] 735 |                         let mut first_non_terminal = first_set.get_mut(non_terminal).unwrap();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:784:33
[INFO] [stdout]     |
[INFO] [stdout] 784 | ...                   let mut follow_rule_element_b = follow_set.get_mut(&b).unwrap();
[INFO] [stdout]     |                           ----^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/lib.rs:982:10
[INFO] [stdout]     |
[INFO] [stdout] 982 |         .into_iter()
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 982 |         .iter()
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 981 |     IntoIterator::into_iter(['\u{0020}', '\u{0009}','\u{000a}','\u{000c}','\u{000d}'])
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^                                                         ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.34s
[INFO] running `Command { std: "docker" "inspect" "4e52a2e52a53b925895210c13ba62dd3be36dd3d5fe609986c9864d7eed856e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e52a2e52a53b925895210c13ba62dd3be36dd3d5fe609986c9864d7eed856e6", kill_on_drop: false }`
[INFO] [stdout] 4e52a2e52a53b925895210c13ba62dd3be36dd3d5fe609986c9864d7eed856e6
