[INFO] fetching crate ari-subscriber 0.0.2...
[INFO] checking ari-subscriber-0.0.2 against master#a33907a7a5381473eec8bcfa0c56e05a856a911c for pr-151539
[INFO] extracting crate ari-subscriber 0.0.2 into /workspace/builds/worker-7-tc1/source
[INFO] removed /workspace/builds/worker-7-tc1/source/.cargo/config
[INFO] started tweaking crates.io crate ari-subscriber 0.0.2
[INFO] finished tweaking crates.io crate ari-subscriber 0.0.2
[INFO] tweaked toml for crates.io crate ari-subscriber 0.0.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ari-subscriber 0.0.2 on toolchain a33907a7a5381473eec8bcfa0c56e05a856a911c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a33907a7a5381473eec8bcfa0c56e05a856a911c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ari-subscriber 0.0.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a33907a7a5381473eec8bcfa0c56e05a856a911c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+a33907a7a5381473eec8bcfa0c56e05a856a911c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b5673fde533f1cde57faa52c13cdb863de93c4fb1c3a25fdfcf7c3908887cec0
[INFO] running `Command { std: "docker" "start" "-a" "b5673fde533f1cde57faa52c13cdb863de93c4fb1c3a25fdfcf7c3908887cec0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5673fde533f1cde57faa52c13cdb863de93c4fb1c3a25fdfcf7c3908887cec0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5673fde533f1cde57faa52c13cdb863de93c4fb1c3a25fdfcf7c3908887cec0", kill_on_drop: false }`
[INFO] [stdout] b5673fde533f1cde57faa52c13cdb863de93c4fb1c3a25fdfcf7c3908887cec0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+a33907a7a5381473eec8bcfa0c56e05a856a911c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fffbc0f24d9be6395635d33615df4c77e97190c6ff36c2cb2b1b090b37f2347
[INFO] running `Command { std: "docker" "start" "-a" "4fffbc0f24d9be6395635d33615df4c77e97190c6ff36c2cb2b1b090b37f2347", kill_on_drop: false }`
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[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]   --> src/layer.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     #[must_use = "A Layer does nothing if it is not added to a registry."]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, and traits
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
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[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]   --> src/layer.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     #[must_use = "A Layer does nothing if it is not added to a registry."]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, and traits
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 37.99s
[INFO] running `Command { std: "docker" "inspect" "4fffbc0f24d9be6395635d33615df4c77e97190c6ff36c2cb2b1b090b37f2347", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fffbc0f24d9be6395635d33615df4c77e97190c6ff36c2cb2b1b090b37f2347", kill_on_drop: false }`
[INFO] [stdout] 4fffbc0f24d9be6395635d33615df4c77e97190c6ff36c2cb2b1b090b37f2347