[INFO] fetching crate nexum 0.1.1...
[INFO] checking nexum-0.1.1 against master#94b72d6bebbddb5d17860914c4544f37365e988c for pr-122789
[INFO] extracting crate nexum 0.1.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate nexum 0.1.1 on toolchain 94b72d6bebbddb5d17860914c4544f37365e988c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+94b72d6bebbddb5d17860914c4544f37365e988c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nexum 0.1.1
[INFO] finished tweaking crates.io crate nexum 0.1.1
[INFO] tweaked toml for crates.io crate nexum 0.1.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+94b72d6bebbddb5d17860914c4544f37365e988c" "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" "+94b72d6bebbddb5d17860914c4544f37365e988c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+94b72d6bebbddb5d17860914c4544f37365e988c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f3fd6db3063dd27231451d4911a882604b2fcb97085b1e4747b8315119ee2225
[INFO] running `Command { std: "docker" "start" "-a" "f3fd6db3063dd27231451d4911a882604b2fcb97085b1e4747b8315119ee2225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3fd6db3063dd27231451d4911a882604b2fcb97085b1e4747b8315119ee2225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3fd6db3063dd27231451d4911a882604b2fcb97085b1e4747b8315119ee2225", kill_on_drop: false }`
[INFO] [stdout] f3fd6db3063dd27231451d4911a882604b2fcb97085b1e4747b8315119ee2225
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+94b72d6bebbddb5d17860914c4544f37365e988c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3197254c2319af90c5ef0f45f55a60844e7631d48c212a0b423c24b17f28ea77
[INFO] running `Command { std: "docker" "start" "-a" "3197254c2319af90c5ef0f45f55a60844e7631d48c212a0b423c24b17f28ea77", kill_on_drop: false }`
[INFO] [stderr]     Checking nexum v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "3197254c2319af90c5ef0f45f55a60844e7631d48c212a0b423c24b17f28ea77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3197254c2319af90c5ef0f45f55a60844e7631d48c212a0b423c24b17f28ea77", kill_on_drop: false }`
[INFO] [stdout] 3197254c2319af90c5ef0f45f55a60844e7631d48c212a0b423c24b17f28ea77
[INFO] checking nexum-0.1.1 against try#cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc for pr-122789
[INFO] extracting crate nexum 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate nexum 0.1.1 on toolchain cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nexum 0.1.1
[INFO] finished tweaking crates.io crate nexum 0.1.1
[INFO] tweaked toml for crates.io crate nexum 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc" "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" "+cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6c89493396548002cf795009acd723d2097db3643e895589e0e077437125d017
[INFO] running `Command { std: "docker" "start" "-a" "6c89493396548002cf795009acd723d2097db3643e895589e0e077437125d017", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6c89493396548002cf795009acd723d2097db3643e895589e0e077437125d017", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c89493396548002cf795009acd723d2097db3643e895589e0e077437125d017", kill_on_drop: false }`
[INFO] [stdout] 6c89493396548002cf795009acd723d2097db3643e895589e0e077437125d017
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab5200e90cb8cefd8af3ccad29310632c185a58cb2dffc12a0a4690cca8c83c4
[INFO] running `Command { std: "docker" "start" "-a" "ab5200e90cb8cefd8af3ccad29310632c185a58cb2dffc12a0a4690cca8c83c4", kill_on_drop: false }`
[INFO] [stderr]     Checking nexum v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0515]: cannot return reference to temporary value
[INFO] [stdout]   --> src/auto_expand_vector/vector.rs:51:20
[INFO] [stdout]    |
[INFO] [stdout] 51 |             return &None;
[INFO] [stdout]    |                    ^----
[INFO] [stdout]    |                    ||
[INFO] [stdout]    |                    |temporary value created here
[INFO] [stdout]    |                    returns a reference to data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return reference to temporary value
[INFO] [stdout]   --> src/auto_expand_vector/vector.rs:51:20
[INFO] [stdout]    |
[INFO] [stdout] 51 |             return &None;
[INFO] [stdout]    |                    ^----
[INFO] [stdout]    |                    ||
[INFO] [stdout]    |                    |temporary value created here
[INFO] [stdout]    |                    returns a reference to data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nexum` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `nexum` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "ab5200e90cb8cefd8af3ccad29310632c185a58cb2dffc12a0a4690cca8c83c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab5200e90cb8cefd8af3ccad29310632c185a58cb2dffc12a0a4690cca8c83c4", kill_on_drop: false }`
[INFO] [stdout] ab5200e90cb8cefd8af3ccad29310632c185a58cb2dffc12a0a4690cca8c83c4