[INFO] crate arc_ast 0.1.0 is already in cache
[INFO] checking arc_ast-0.1.0 against try#1cdff26b98d4c2377ea6ae8929f1daebbf58f2b0 for pr-69530
[INFO] extracting crate arc_ast 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate arc_ast 0.1.0 on toolchain 1cdff26b98d4c2377ea6ae8929f1daebbf58f2b0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1cdff26b98d4c2377ea6ae8929f1daebbf58f2b0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate arc_ast 0.1.0
[INFO] finished tweaking crates.io crate arc_ast 0.1.0
[INFO] tweaked toml for crates.io crate arc_ast 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1cdff26b98d4c2377ea6ae8929f1daebbf58f2b0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1cdff26b98d4c2377ea6ae8929f1daebbf58f2b0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1cdff26b98d4c2377ea6ae8929f1daebbf58f2b0" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fbfa1ea548a0544f7204b39fd188ef53e9820160b87c3d1347da44576c540ef3
[INFO] running `"docker" "start" "-a" "fbfa1ea548a0544f7204b39fd188ef53e9820160b87c3d1347da44576c540ef3"`
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking arc_number v0.1.1
[INFO] [stderr]     Checking arc_ast v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `ops::IndexMut`
[INFO] [stderr]  --> src/utils/ast_impl.rs:4:34
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::{collections::VecDeque, ops::IndexMut};
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Error`
[INFO] [stderr]  --> src/utils/ast_traits.rs:4:33
[INFO] [stderr]   |
[INFO] [stderr] 4 |     fmt::{self, Debug, Display, Error, Formatter},
[INFO] [stderr]   |                                 ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::VecDeque`
[INFO] [stderr]  --> src/lib.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::collections::VecDeque;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ops::IndexMut`
[INFO] [stderr]  --> src/utils/ast_impl.rs:4:34
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::{collections::VecDeque, ops::IndexMut};
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Error`
[INFO] [stderr]  --> src/utils/ast_traits.rs:4:33
[INFO] [stderr]   |
[INFO] [stderr] 4 |     fmt::{self, Debug, Display, Error, Formatter},
[INFO] [stderr]   |                                 ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::VecDeque`
[INFO] [stderr]  --> src/lib.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::collections::VecDeque;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `length` is assigned to, but never used
[INFO] [stderr]   --> src/utils/ast_traits.rs:71:25
[INFO] [stderr]    |
[INFO] [stderr] 71 |                 let mut length = 0;
[INFO] [stderr]    |                         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: consider using `_length` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable `length` is assigned to, but never used
[INFO] [stderr]   --> src/utils/ast_traits.rs:71:25
[INFO] [stderr]    |
[INFO] [stderr] 71 |                 let mut length = 0;
[INFO] [stderr]    |                         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: consider using `_length` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.44s
[INFO] running `"docker" "inspect" "fbfa1ea548a0544f7204b39fd188ef53e9820160b87c3d1347da44576c540ef3"`
[INFO] running `"docker" "rm" "-f" "fbfa1ea548a0544f7204b39fd188ef53e9820160b87c3d1347da44576c540ef3"`
[INFO] [stdout] fbfa1ea548a0544f7204b39fd188ef53e9820160b87c3d1347da44576c540ef3