[INFO] fetching crate x328-proto 0.1.2...
[INFO] checking x328-proto-0.1.2 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate x328-proto 0.1.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate x328-proto 0.1.2 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate x328-proto 0.1.2
[INFO] finished tweaking crates.io crate x328-proto 0.1.2
[INFO] tweaked toml for crates.io crate x328-proto 0.1.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate x328-proto 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a6237639a537b88827c0ec1d9aeee28f6bd615b62373ce56219bb2aecbedbbd2
[INFO] running `Command { std: "docker" "start" "-a" "a6237639a537b88827c0ec1d9aeee28f6bd615b62373ce56219bb2aecbedbbd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6237639a537b88827c0ec1d9aeee28f6bd615b62373ce56219bb2aecbedbbd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6237639a537b88827c0ec1d9aeee28f6bd615b62373ce56219bb2aecbedbbd2", kill_on_drop: false }`
[INFO] [stdout] a6237639a537b88827c0ec1d9aeee28f6bd615b62373ce56219bb2aecbedbbd2
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 86ad53197cd3b91f09b9184f60e6e03669f58ec53c7334aa77ae93d846b91517
[INFO] running `Command { std: "docker" "start" "-a" "86ad53197cd3b91f09b9184f60e6e03669f58ec53c7334aa77ae93d846b91517", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking arrayvec v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling nom v6.1.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]     Checking snafu v0.6.10
[INFO] [stderr]     Checking x328-proto v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `master`
[INFO] [stdout]    --> src/master.rs:230:5
[INFO] [stdout]     |
[INFO] [stdout] 230 |     master: &'a mut Master,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `master`
[INFO] [stdout]    --> src/master.rs:230:5
[INFO] [stdout]     |
[INFO] [stdout] 230 |     master: &'a mut Master,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.31s
[INFO] running `Command { std: "docker" "inspect" "86ad53197cd3b91f09b9184f60e6e03669f58ec53c7334aa77ae93d846b91517", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86ad53197cd3b91f09b9184f60e6e03669f58ec53c7334aa77ae93d846b91517", kill_on_drop: false }`
[INFO] [stdout] 86ad53197cd3b91f09b9184f60e6e03669f58ec53c7334aa77ae93d846b91517