[INFO] fetching crate rust_ringitem_format 0.1.2...
[INFO] checking rust_ringitem_format-0.1.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate rust_ringitem_format 0.1.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rust_ringitem_format 0.1.2
[INFO] finished tweaking crates.io crate rust_ringitem_format 0.1.2
[INFO] tweaked toml for crates.io crate rust_ringitem_format 0.1.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust_ringitem_format 0.1.2 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rust_ringitem_format 0.1.2 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 14d63fb853fafd9df9d495458aae5efdb149f8d46f3563dafba0a47a28ea980f
[INFO] running `Command { std: "docker" "start" "-a" "14d63fb853fafd9df9d495458aae5efdb149f8d46f3563dafba0a47a28ea980f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14d63fb853fafd9df9d495458aae5efdb149f8d46f3563dafba0a47a28ea980f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14d63fb853fafd9df9d495458aae5efdb149f8d46f3563dafba0a47a28ea980f", kill_on_drop: false }`
[INFO] [stdout] 14d63fb853fafd9df9d495458aae5efdb149f8d46f3563dafba0a47a28ea980f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4c157c1d15e327c21c2672f1c02966e24275058c4e27d78849e81da2560ad536
[INFO] running `Command { std: "docker" "start" "-a" "4c157c1d15e327c21c2672f1c02966e24275058c4e27d78849e81da2560ad536", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling rustix v1.0.8
[INFO] [stderr]     Checking linux-raw-sys v0.9.4
[INFO] [stderr]     Checking bitflags v2.9.3
[INFO] [stderr]     Checking getrandom v0.3.3
[INFO] [stderr]     Checking tempfile v3.21.0
[INFO] [stderr]     Checking rust_ringitem_format v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<u8>, Infallible>
[INFO] [stdout]    --> src/lib.rs:332:23
[INFO] [stdout]     |
[INFO] [stdout] 332 |     String::from_utf8(bytes[o..o + slen].try_into().unwrap()).unwrap()
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_ringitem_format` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<u8>, Infallible>
[INFO] [stdout]    --> src/lib.rs:332:23
[INFO] [stdout]     |
[INFO] [stdout] 332 |     String::from_utf8(bytes[o..o + slen].try_into().unwrap()).unwrap()
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_ringitem_format` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "4c157c1d15e327c21c2672f1c02966e24275058c4e27d78849e81da2560ad536", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c157c1d15e327c21c2672f1c02966e24275058c4e27d78849e81da2560ad536", kill_on_drop: false }`
[INFO] [stdout] 4c157c1d15e327c21c2672f1c02966e24275058c4e27d78849e81da2560ad536
