[INFO] updating cached repository https://github.com/rklaehn/rust-hypercore-playground
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bb11c924ed6dd5fa6ef04235156254fec3331e27
[INFO] checking rklaehn/rust-hypercore-playground against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frklaehn%2Frust-hypercore-playground" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rklaehn/rust-hypercore-playground on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/rklaehn/rust-hypercore-playground
[INFO] finished tweaking git repo https://github.com/rklaehn/rust-hypercore-playground
[INFO] tweaked toml for git repo https://github.com/rklaehn/rust-hypercore-playground written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/rklaehn/rust-hypercore-playground already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+45d050cde277b22a755847338f2acc2c7b834141" "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] f6fdee236c751630ad1596b424fcda50de22a5a606ac8e98f33c4c30833fff5f
[INFO] running `"docker" "start" "-a" "f6fdee236c751630ad1596b424fcda50de22a5a606ac8e98f33c4c30833fff5f"`
[INFO] [stderr]    Compiling cc v1.0.40
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling subtle v2.1.1
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking flat-tree v3.7.0
[INFO] [stderr]     Checking flat-tree v4.1.0
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking block-padding v0.1.4
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking merkle-tree-stream v0.10.0
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling clear_on_drop v0.2.3
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling curve25519-dalek v1.2.3
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking sha2 v0.8.0
[INFO] [stderr]     Checking backtrace v0.3.35
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking random-access-storage v2.0.0
[INFO] [stderr]     Checking memory-pager v0.8.0
[INFO] [stderr]     Checking sleep-parser v0.8.0
[INFO] [stderr]     Checking ed25519-dalek v0.9.1
[INFO] [stderr]     Checking pretty-hash v0.4.0
[INFO] [stderr]     Checking random-access-memory v1.0.0
[INFO] [stderr]     Checking random-access-disk v0.8.0
[INFO] [stderr]     Checking sparse-bitfield v0.8.1
[INFO] [stderr]     Checking tree-index v0.5.0
[INFO] [stderr]     Checking hypercore v0.10.0
[INFO] [stderr]     Checking hypercore-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `RandomAccessDisk`
[INFO] [stderr]  --> src/main.rs:4:26
[INFO] [stderr]   |
[INFO] [stderr] 4 | use random_access_disk::{RandomAccessDisk};
[INFO] [stderr]   |                          ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `RandomAccessDisk`
[INFO] [stderr]  --> src/main.rs:4:26
[INFO] [stderr]   |
[INFO] [stderr] 4 | use random_access_disk::{RandomAccessDisk};
[INFO] [stderr]   |                          ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 55.15s
[INFO] running `"docker" "inspect" "f6fdee236c751630ad1596b424fcda50de22a5a606ac8e98f33c4c30833fff5f"`
[INFO] running `"docker" "rm" "-f" "f6fdee236c751630ad1596b424fcda50de22a5a606ac8e98f33c4c30833fff5f"`
[INFO] [stdout] f6fdee236c751630ad1596b424fcda50de22a5a606ac8e98f33c4c30833fff5f