[INFO] crate blackbox 0.1.0 is already in cache
[INFO] checking blackbox-0.1.0 against try#e922e6444795ab795fab1943288aee3d543699b8 for pr-66852
[INFO] extracting crate blackbox 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate blackbox 0.1.0 on toolchain e922e6444795ab795fab1943288aee3d543699b8
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e922e6444795ab795fab1943288aee3d543699b8" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate blackbox 0.1.0
[INFO] finished tweaking crates.io crate blackbox 0.1.0
[INFO] tweaked toml for crates.io crate blackbox 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e922e6444795ab795fab1943288aee3d543699b8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e922e6444795ab795fab1943288aee3d543699b8" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+e922e6444795ab795fab1943288aee3d543699b8" "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] f77340d556660bcfce8b9cdbdb9d2cc63923b12622998ca460fd71e861263799
[INFO] running `"docker" "start" "-a" "f77340d556660bcfce8b9cdbdb9d2cc63923b12622998ca460fd71e861263799"`
[INFO] [stderr]     Checking proc-macro2 v0.4.30
[INFO] [stderr]    Compiling blackbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `Ident`, `Lit`, `ParseStream`, `Parse`, `Result`, `Type`
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     Type, Ident, Lit,
[INFO] [stderr]    |     ^^^^  ^^^^^  ^^^
[INFO] [stderr] 11 |     parse::{Parse, ParseStream, Result}
[INFO] [stderr]    |             ^^^^^  ^^^^^^^^^^^  ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr] warning: unused imports: `Ident`, `Lit`, `ParseStream`, `Parse`, `Result`, `Type`
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     Type, Ident, Lit,
[INFO] [stderr]    |     ^^^^  ^^^^^  ^^^
[INFO] [stderr] 11 |     parse::{Parse, ParseStream, Result}
[INFO] [stderr]    |             ^^^^^  ^^^^^^^^^^^  ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ident`, `Lit`, `ParseStream`, `Parse`, `Result`, `Type`
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     Type, Ident, Lit,
[INFO] [stderr]    |     ^^^^  ^^^^^  ^^^
[INFO] [stderr] 11 |     parse::{Parse, ParseStream, Result}
[INFO] [stderr]    |             ^^^^^  ^^^^^^^^^^^  ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.59s
[INFO] running `"docker" "inspect" "f77340d556660bcfce8b9cdbdb9d2cc63923b12622998ca460fd71e861263799"`
[INFO] running `"docker" "rm" "-f" "f77340d556660bcfce8b9cdbdb9d2cc63923b12622998ca460fd71e861263799"`
[INFO] [stdout] f77340d556660bcfce8b9cdbdb9d2cc63923b12622998ca460fd71e861263799