[INFO] cloning repository https://github.com/ijchen/pair
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ijchen/pair" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fijchen%2Fpair", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fijchen%2Fpair'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 94e927a04bdcc0d0d946b3cb626f298afae38ba2
[INFO] checking ijchen/pair against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fijchen%2Fpair" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ijchen/pair
[INFO] finished tweaking git repo https://github.com/ijchen/pair
[INFO] tweaked toml for git repo https://github.com/ijchen/pair written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ijchen/pair 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 git repo https://github.com/ijchen/pair 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] b0ad96bb7b92cbb9c5baa1c168c366de6b691bb7f3c54a876dd38fa6d2831656
[INFO] running `Command { std: "docker" "start" "-a" "b0ad96bb7b92cbb9c5baa1c168c366de6b691bb7f3c54a876dd38fa6d2831656", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0ad96bb7b92cbb9c5baa1c168c366de6b691bb7f3c54a876dd38fa6d2831656", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0ad96bb7b92cbb9c5baa1c168c366de6b691bb7f3c54a876dd38fa6d2831656", kill_on_drop: false }`
[INFO] [stdout] b0ad96bb7b92cbb9c5baa1c168c366de6b691bb7f3c54a876dd38fa6d2831656
[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] 36f4fef640e5288413c75b93e97ee14fe288480ebc579c02eed45f4c5c6673a4
[INFO] running `Command { std: "docker" "start" "-a" "36f4fef640e5288413c75b93e97ee14fe288480ebc579c02eed45f4c5c6673a4", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.20.3
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]    Compiling libc v0.2.170
[INFO] [stderr]     Checking log v0.4.26
[INFO] [stderr]     Checking smallvec v1.14.0
[INFO] [stderr]     Checking pair v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling generator v0.8.4
[INFO] [stdout] error: this type will no longer be must used: Result<Pair<O>, (O, Infallible)>
[INFO] [stdout]    --> src/pair.rs:465:24
[INFO] [stdout]     |
[INFO] [stdout] 465 |         let Ok(pair) = Self::try_new_with_context(owner, context);
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Pair<O>, (Box<O>, Infallible)>
[INFO] [stdout]    --> src/pair.rs:475:24
[INFO] [stdout]     |
[INFO] [stdout] 475 |         let Ok(pair) = Self::try_new_from_box_with_context(owner, context);
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pair` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "36f4fef640e5288413c75b93e97ee14fe288480ebc579c02eed45f4c5c6673a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36f4fef640e5288413c75b93e97ee14fe288480ebc579c02eed45f4c5c6673a4", kill_on_drop: false }`
[INFO] [stdout] 36f4fef640e5288413c75b93e97ee14fe288480ebc579c02eed45f4c5c6673a4