[INFO] updating cached repository https://github.com/OffBlockway/OffBlockwayMiningClient
[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] 6fc1cfb70b1656b364916575b4405331ae0f6a8f
[INFO] checking OffBlockway/OffBlockwayMiningClient against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOffBlockway%2FOffBlockwayMiningClient" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/OffBlockway/OffBlockwayMiningClient on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/OffBlockway/OffBlockwayMiningClient
[INFO] finished tweaking git repo https://github.com/OffBlockway/OffBlockwayMiningClient
[INFO] tweaked toml for git repo https://github.com/OffBlockway/OffBlockwayMiningClient written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/OffBlockway/OffBlockwayMiningClient already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "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] 84136c1bf2424df66238d144844f4c77125e59beaa15e40cdcade3a282b5b24d
[INFO] running `"docker" "start" "-a" "84136c1bf2424df66238d144844f4c77125e59beaa15e40cdcade3a282b5b24d"`
[INFO] [stderr]     Checking serde_json v1.0.8
[INFO] [stderr]     Checking generic-array v0.8.3
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]     Checking num v0.1.41
[INFO] [stderr]     Checking digest v0.6.2
[INFO] [stderr]     Checking block-buffer v0.2.0
[INFO] [stderr]     Checking chrono v0.4.0
[INFO] [stderr]     Checking sha3 v0.6.0
[INFO] [stderr]     Checking off_blockway v0.0.8
[INFO] [stderr] error[E0283]: type annotations needed: cannot resolve `std::string::String: std::ops::AddAssign<&&_>`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/off_blockway-0.0.8/src/hash_util.rs:65:10
[INFO] [stderr]    |
[INFO] [stderr] 65 |     temp += &block.index().to_string().as_ref();
[INFO] [stderr]    |          ^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0283`.
[INFO] [stderr] error: could not compile `off_blockway`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "84136c1bf2424df66238d144844f4c77125e59beaa15e40cdcade3a282b5b24d"`
[INFO] running `"docker" "rm" "-f" "84136c1bf2424df66238d144844f4c77125e59beaa15e40cdcade3a282b5b24d"`
[INFO] [stdout] 84136c1bf2424df66238d144844f4c77125e59beaa15e40cdcade3a282b5b24d