[INFO] fetching crate thin-vec 0.2.12...
[INFO] checking thin-vec-0.2.12 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-2
[INFO] extracting crate thin-vec 0.2.12 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate thin-vec 0.2.12 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate thin-vec 0.2.12
[INFO] finished tweaking crates.io crate thin-vec 0.2.12
[INFO] tweaked toml for crates.io crate thin-vec 0.2.12 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 8 packages
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "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-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f1a7e0aa5b1960181644dad8800b3ba01c123946a74f116a53325942933a1fc1
[INFO] running `Command { std: "docker" "start" "-a" "f1a7e0aa5b1960181644dad8800b3ba01c123946a74f116a53325942933a1fc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1a7e0aa5b1960181644dad8800b3ba01c123946a74f116a53325942933a1fc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1a7e0aa5b1960181644dad8800b3ba01c123946a74f116a53325942933a1fc1", kill_on_drop: false }`
[INFO] [stdout] f1a7e0aa5b1960181644dad8800b3ba01c123946a74f116a53325942933a1fc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9c7d70291ec7c2965584e7c1e6713d62f093ca1942097f71d98c8f28c097390
[INFO] running `Command { std: "docker" "start" "-a" "f9c7d70291ec7c2965584e7c1e6713d62f093ca1942097f71d98c8f28c097390", kill_on_drop: false }`
[INFO] [stderr]     Checking thin-vec v0.2.12 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_test v1.0.176
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/lib.rs:2660:24
[INFO] [stdout]      |
[INFO] [stdout] 2660 |         struct Align16(u8);
[INFO] [stdout]      |                ------- ^^
[INFO] [stdout]      |                |
[INFO] [stdout]      |                field in this struct
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 2660 |         struct Align16(());
[INFO] [stdout]      |                        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/lib.rs:3380:21
[INFO] [stdout]      |
[INFO] [stdout] 3380 |         struct Elem(i32);
[INFO] [stdout]      |                ---- ^^^
[INFO] [stdout]      |                |
[INFO] [stdout]      |                field in this struct
[INFO] [stdout]      |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 3380 |         struct Elem(());
[INFO] [stdout]      |                     ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `Command { std: "docker" "inspect" "f9c7d70291ec7c2965584e7c1e6713d62f093ca1942097f71d98c8f28c097390", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9c7d70291ec7c2965584e7c1e6713d62f093ca1942097f71d98c8f28c097390", kill_on_drop: false }`
[INFO] [stdout] f9c7d70291ec7c2965584e7c1e6713d62f093ca1942097f71d98c8f28c097390
[INFO] checking thin-vec-0.2.12 against try#36dbcaee1a55543dfc181be52a69d99ff46ff62f for pr-122960-2
[INFO] extracting crate thin-vec 0.2.12 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate thin-vec 0.2.12 on toolchain 36dbcaee1a55543dfc181be52a69d99ff46ff62f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate thin-vec 0.2.12
[INFO] finished tweaking crates.io crate thin-vec 0.2.12
[INFO] tweaked toml for crates.io crate thin-vec 0.2.12 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2fd4482a8bc40c3e8340f01eaa2c4ae67d528cb61f3645d01ad1c19f5db7e90c
[INFO] running `Command { std: "docker" "start" "-a" "2fd4482a8bc40c3e8340f01eaa2c4ae67d528cb61f3645d01ad1c19f5db7e90c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fd4482a8bc40c3e8340f01eaa2c4ae67d528cb61f3645d01ad1c19f5db7e90c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fd4482a8bc40c3e8340f01eaa2c4ae67d528cb61f3645d01ad1c19f5db7e90c", kill_on_drop: false }`
[INFO] [stdout] 2fd4482a8bc40c3e8340f01eaa2c4ae67d528cb61f3645d01ad1c19f5db7e90c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54d3bfe020e69dda68b6e33826009c46d99608fe593ca3e1ba406b36f7587d9e
[INFO] running `Command { std: "docker" "start" "-a" "54d3bfe020e69dda68b6e33826009c46d99608fe593ca3e1ba406b36f7587d9e", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] skipping non-2021 edition `2018`
[INFO] running `Command { std: "docker" "inspect" "54d3bfe020e69dda68b6e33826009c46d99608fe593ca3e1ba406b36f7587d9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54d3bfe020e69dda68b6e33826009c46d99608fe593ca3e1ba406b36f7587d9e", kill_on_drop: false }`
[INFO] [stdout] 54d3bfe020e69dda68b6e33826009c46d99608fe593ca3e1ba406b36f7587d9e