[INFO] fetching crate wybr 0.0.5...
[INFO] checking wybr-0.0.5 against master#38352b01ae4af9300be03b805d6db68c45e51068 for pr-129864
[INFO] extracting crate wybr 0.0.5 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate wybr 0.0.5 on toolchain 38352b01ae4af9300be03b805d6db68c45e51068
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wybr 0.0.5
[INFO] finished tweaking crates.io crate wybr 0.0.5
[INFO] tweaked toml for crates.io crate wybr 0.0.5 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "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-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 504fa395df8100048152ad9fc8ff09faed7909855ed6dcfc9976c61bd1a6df7c
[INFO] running `Command { std: "docker" "start" "-a" "504fa395df8100048152ad9fc8ff09faed7909855ed6dcfc9976c61bd1a6df7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "504fa395df8100048152ad9fc8ff09faed7909855ed6dcfc9976c61bd1a6df7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "504fa395df8100048152ad9fc8ff09faed7909855ed6dcfc9976c61bd1a6df7c", kill_on_drop: false }`
[INFO] [stdout] 504fa395df8100048152ad9fc8ff09faed7909855ed6dcfc9976c61bd1a6df7c
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a2e31ccf6a71a2599ea1441acd5016d6db6dfc6f38bb7c7f18383416fe816919
[INFO] running `Command { std: "docker" "start" "-a" "a2e31ccf6a71a2599ea1441acd5016d6db6dfc6f38bb7c7f18383416fe816919", kill_on_drop: false }`
[INFO] [stderr]     Checking wybr v0.0.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]    --> src/tally.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |         format!("{:?}", x);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `Command { std: "docker" "inspect" "a2e31ccf6a71a2599ea1441acd5016d6db6dfc6f38bb7c7f18383416fe816919", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2e31ccf6a71a2599ea1441acd5016d6db6dfc6f38bb7c7f18383416fe816919", kill_on_drop: false }`
[INFO] [stdout] a2e31ccf6a71a2599ea1441acd5016d6db6dfc6f38bb7c7f18383416fe816919