[INFO] fetching crate prcn_lib 0.2.3...
[INFO] checking prcn_lib-0.2.3 against try#13f916f63bc6575d5ff1f989237dfabe88981368 for pr-69880
[INFO] extracting crate prcn_lib 0.2.3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate prcn_lib 0.2.3 on toolchain 13f916f63bc6575d5ff1f989237dfabe88981368
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate prcn_lib 0.2.3
[INFO] finished tweaking crates.io crate prcn_lib 0.2.3
[INFO] tweaked toml for crates.io crate prcn_lib 0.2.3 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate prcn_lib 0.2.3 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+13f916f63bc6575d5ff1f989237dfabe88981368" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6f1779d7d7101d95c076d9351fab66f2dcb7b9536ece48c04a98066734273aa0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "6f1779d7d7101d95c076d9351fab66f2dcb7b9536ece48c04a98066734273aa0"`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling proconio-derive v0.1.6
[INFO] [stderr]     Checking proconio v0.3.6
[INFO] [stderr]     Checking prcn_lib v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `BitOrAssign`, `BitOr`, `BitXorAssign`, `BitXor`
[INFO] [stderr]  --> src/bitset/def.rs:2:87
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::ops::{Shl, ShlAssign, Shr, ShrAssign, Index, IndexMut, BitAnd, BitAndAssign, BitOr, BitOrAssign, BitXor, BitXorAssign};
[INFO] [stderr]   |                                                                                       ^^^^^  ^^^^^^^^^^^  ^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]    --> src/math/tools.rs:147:9
[INFO] [stderr]     |
[INFO] [stderr] 147 |     let a = vec![1, 2, 3, 4, 5,];
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `iet`
[INFO] [stderr]    --> src/math/tools.rs:146:4
[INFO] [stderr]     |
[INFO] [stderr] 146 | fn iet() {
[INFO] [stderr]     |    ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BitOrAssign`, `BitOr`, `BitXorAssign`, `BitXor`
[INFO] [stderr]  --> src/bitset/def.rs:2:87
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::ops::{Shl, ShlAssign, Shr, ShrAssign, Index, IndexMut, BitAnd, BitAndAssign, BitOr, BitOrAssign, BitXor, BitXorAssign};
[INFO] [stderr]   |                                                                                       ^^^^^  ^^^^^^^^^^^  ^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]    --> src/math/tools.rs:147:9
[INFO] [stderr]     |
[INFO] [stderr] 147 |     let a = vec![1, 2, 3, 4, 5,];
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `iet`
[INFO] [stderr]    --> src/math/tools.rs:146:4
[INFO] [stderr]     |
[INFO] [stderr] 146 | fn iet() {
[INFO] [stderr]     |    ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.99s
[INFO] running `"docker" "inspect" "6f1779d7d7101d95c076d9351fab66f2dcb7b9536ece48c04a98066734273aa0"`
[INFO] running `"docker" "rm" "-f" "6f1779d7d7101d95c076d9351fab66f2dcb7b9536ece48c04a98066734273aa0"`
[INFO] [stdout] 6f1779d7d7101d95c076d9351fab66f2dcb7b9536ece48c04a98066734273aa0