[INFO] cloning repository https://github.com/00xc/slabfs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/00xc/slabfs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F00xc%2Fslabfs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F00xc%2Fslabfs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] db03c21a62803f15755bf8bc0b062533e05cac47
[INFO] checking 00xc/slabfs against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F00xc%2Fslabfs" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/00xc/slabfs on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/00xc/slabfs
[INFO] finished tweaking git repo https://github.com/00xc/slabfs
[INFO] tweaked toml for git repo https://github.com/00xc/slabfs written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/00xc/slabfs 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fastcmp v1.0.1
[INFO] [stderr]   Downloaded vm-memory v0.9.0
[INFO] [stderr]   Downloaded vmm-sys-util v0.10.0
[INFO] [stderr]   Downloaded io-uring v0.5.13
[INFO] [stderr]   Downloaded tokio-uring v0.4.0
[INFO] [stderr]   Downloaded fuse-backend-rs v0.10.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff8b4b7fece68e07e9b404af50af798df4f4726ac34e37a5056d19b4b40ae2e6
[INFO] running `Command { std: "docker" "start" "-a" "ff8b4b7fece68e07e9b404af50af798df4f4726ac34e37a5056d19b4b40ae2e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff8b4b7fece68e07e9b404af50af798df4f4726ac34e37a5056d19b4b40ae2e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff8b4b7fece68e07e9b404af50af798df4f4726ac34e37a5056d19b4b40ae2e6", kill_on_drop: false }`
[INFO] [stdout] ff8b4b7fece68e07e9b404af50af798df4f4726ac34e37a5056d19b4b40ae2e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f32aa538a594f250a6172114a838fd3053351ce19e5193718df69bc7aa6b9403
[INFO] running `Command { std: "docker" "start" "-a" "f32aa538a594f250a6172114a838fd3053351ce19e5193718df69bc7aa6b9403", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling tokio v1.29.1
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling io-uring v0.5.13
[INFO] [stderr]     Checking pin-project-lite v0.2.10
[INFO] [stderr]    Compiling fuse-backend-rs v0.10.4
[INFO] [stderr]    Compiling fastcmp v1.0.1
[INFO] [stderr]     Checking scoped-tls v1.0.1
[INFO] [stderr]     Checking arc-swap v1.6.0
[INFO] [stderr]     Checking bitflags v2.3.3
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]    Compiling syn v2.0.23
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]     Checking vm-memory v0.9.0
[INFO] [stderr]     Checking vmm-sys-util v0.10.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]     Checking tokio-uring v0.4.0
[INFO] [stderr]     Checking caps v0.5.5
[INFO] [stderr]     Checking slabfs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.51s
[INFO] running `Command { std: "docker" "inspect" "f32aa538a594f250a6172114a838fd3053351ce19e5193718df69bc7aa6b9403", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f32aa538a594f250a6172114a838fd3053351ce19e5193718df69bc7aa6b9403", kill_on_drop: false }`
[INFO] [stdout] f32aa538a594f250a6172114a838fd3053351ce19e5193718df69bc7aa6b9403
[INFO] checking 00xc/slabfs against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F00xc%2Fslabfs" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/00xc/slabfs on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/00xc/slabfs
[INFO] finished tweaking git repo https://github.com/00xc/slabfs
[INFO] tweaked toml for git repo https://github.com/00xc/slabfs written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/00xc/slabfs 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b421e16b467fa0fe90c34b04b5ce395b46ec135015f9fda90abd4227c157bc8e
[INFO] running `Command { std: "docker" "start" "-a" "b421e16b467fa0fe90c34b04b5ce395b46ec135015f9fda90abd4227c157bc8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b421e16b467fa0fe90c34b04b5ce395b46ec135015f9fda90abd4227c157bc8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b421e16b467fa0fe90c34b04b5ce395b46ec135015f9fda90abd4227c157bc8e", kill_on_drop: false }`
[INFO] [stdout] b421e16b467fa0fe90c34b04b5ce395b46ec135015f9fda90abd4227c157bc8e
[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" "-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cf9efb7e77f1583f0b82479c08393b9a7adebb946b010d3f251c79c3f98bfad
[INFO] running `Command { std: "docker" "start" "-a" "7cf9efb7e77f1583f0b82479c08393b9a7adebb946b010d3f251c79c3f98bfad", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling tokio v1.29.1
[INFO] [stderr]    Compiling io-uring v0.5.13
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]     Checking pin-project-lite v0.2.10
[INFO] [stderr]    Compiling fuse-backend-rs v0.10.4
[INFO] [stderr]    Compiling fastcmp v1.0.1
[INFO] [stderr]     Checking scoped-tls v1.0.1
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking arc-swap v1.6.0
[INFO] [stderr]     Checking bitflags v2.3.3
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]    Compiling syn v2.0.23
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking vm-memory v0.9.0
[INFO] [stderr]     Checking vmm-sys-util v0.10.0
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]     Checking tokio-uring v0.4.0
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-uring-0.4.0/src/runtime/mod.rs:83:24
[INFO] [stdout]    |
[INFO] [stdout] 83 |               async move {
[INFO] [stdout]    |  ________________________^
[INFO] [stdout] 84 | |                 loop {
[INFO] [stdout] 85 | |                     // Wait for read-readiness
[INFO] [stdout] 86 | |                     let mut guard = driver.readable().await.unwrap();
[INFO] [stdout] ...  |
[INFO] [stdout] 89 | |                 }
[INFO] [stdout] 90 | |             }
[INFO] [stdout]    | |_____________^ cannot infer type
[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 E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tokio-uring` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7cf9efb7e77f1583f0b82479c08393b9a7adebb946b010d3f251c79c3f98bfad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cf9efb7e77f1583f0b82479c08393b9a7adebb946b010d3f251c79c3f98bfad", kill_on_drop: false }`
[INFO] [stdout] 7cf9efb7e77f1583f0b82479c08393b9a7adebb946b010d3f251c79c3f98bfad