[INFO] cloning repository https://github.com/caoyifeng007/rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/caoyifeng007/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaoyifeng007%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaoyifeng007%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d2d3b605c133d3640037fd98de521c9a9f75d491
[INFO] checking caoyifeng007/rust-learning against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaoyifeng007%2Frust-learning" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/caoyifeng007/rust-learning 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/caoyifeng007/rust-learning
[INFO] finished tweaking git repo https://github.com/caoyifeng007/rust-learning
[INFO] tweaked toml for git repo https://github.com/caoyifeng007/rust-learning written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/caoyifeng007/rust-learning 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 hermit-abi v0.3.4
[INFO] [stderr]   Downloaded tokio-macros v1.8.2
[INFO] [stderr]   Downloaded async-stream-impl v0.3.5
[INFO] [stderr]   Downloaded atoi v0.3.3
[INFO] [stderr]   Downloaded tracing-log v0.1.4
[INFO] [stderr]   Downloaded thread_local v1.1.7
[INFO] [stderr]   Downloaded async-stream v0.3.5
[INFO] [stderr]   Downloaded getrandom v0.2.7
[INFO] [stderr]   Downloaded pin-project-internal v1.1.4
[INFO] [stderr]   Downloaded pin-project v1.1.4
[INFO] [stderr]   Downloaded windows-core v0.52.0
[INFO] [stderr]   Downloaded chrono v0.4.33
[INFO] [stderr]   Downloaded libc v0.2.132
[INFO] [stderr]   Downloaded serde_json v1.0.113
[INFO] [stderr]   Downloaded tokio v1.26.0
[INFO] [stderr]   Downloaded sharded-slab v0.1.7
[INFO] [stderr]   Downloaded serde v1.0.196
[INFO] [stderr]   Downloaded ryu v1.0.16
[INFO] [stderr]   Downloaded serde_derive v1.0.196
[INFO] [stderr]   Downloaded mini-redis v0.4.1
[INFO] [stderr]   Downloaded iana-time-zone v0.1.59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] af7ed58e4d7fe89d55356198d005fdd1dacd7deadf952b8440a9d7c75d2ec8a0
[INFO] running `Command { std: "docker" "start" "-a" "af7ed58e4d7fe89d55356198d005fdd1dacd7deadf952b8440a9d7c75d2ec8a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af7ed58e4d7fe89d55356198d005fdd1dacd7deadf952b8440a9d7c75d2ec8a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af7ed58e4d7fe89d55356198d005fdd1dacd7deadf952b8440a9d7c75d2ec8a0", kill_on_drop: false }`
[INFO] [stdout] af7ed58e4d7fe89d55356198d005fdd1dacd7deadf952b8440a9d7c75d2ec8a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 4b92c877d0555ba75a73cf5f101a35c63d1dace32d279feec309c0611102087e
[INFO] running `Command { std: "docker" "start" "-a" "4b92c877d0555ba75a73cf5f101a35c63d1dace32d279feec309c0611102087e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]     Checking smallvec v1.13.1
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling tokio v1.26.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]    Compiling serde_json v1.0.113
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]     Checking parking_lot_core v0.9.9
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking socket2 v0.4.7
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking bytes v1.5.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking iana-time-zone v0.1.59
[INFO] [stderr]     Checking ryu v1.0.16
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking chrono v0.4.33
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]     Checking tracing-serde v0.1.3
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking tracing-log v0.1.4
[INFO] [stderr]     Checking thread_local v1.1.7
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking atoi v0.3.3
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling tokio-macros v1.8.2
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling pin-project-internal v1.1.4
[INFO] [stderr]    Compiling async-stream-impl v0.3.5
[INFO] [stderr]     Checking async-stream v0.3.5
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking pin-project v1.1.4
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking mini-redis v0.4.1
[INFO] [stderr]     Checking rust-learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `sqrt` is never used
[INFO] [stdout]   --> src/lib.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn sqrt(number: f64) -> Result<f64, String> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.79s
[INFO] running `Command { std: "docker" "inspect" "4b92c877d0555ba75a73cf5f101a35c63d1dace32d279feec309c0611102087e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b92c877d0555ba75a73cf5f101a35c63d1dace32d279feec309c0611102087e", kill_on_drop: false }`
[INFO] [stdout] 4b92c877d0555ba75a73cf5f101a35c63d1dace32d279feec309c0611102087e
[INFO] checking caoyifeng007/rust-learning against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaoyifeng007%2Frust-learning" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/caoyifeng007/rust-learning 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/caoyifeng007/rust-learning
[INFO] finished tweaking git repo https://github.com/caoyifeng007/rust-learning
[INFO] tweaked toml for git repo https://github.com/caoyifeng007/rust-learning written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/caoyifeng007/rust-learning 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 1e8db45a58278cdf8d2cb33498dd3b19e06b44b600b2d744e1e533a9d77d10ac
[INFO] running `Command { std: "docker" "start" "-a" "1e8db45a58278cdf8d2cb33498dd3b19e06b44b600b2d744e1e533a9d77d10ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e8db45a58278cdf8d2cb33498dd3b19e06b44b600b2d744e1e533a9d77d10ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e8db45a58278cdf8d2cb33498dd3b19e06b44b600b2d744e1e533a9d77d10ac", kill_on_drop: false }`
[INFO] [stdout] 1e8db45a58278cdf8d2cb33498dd3b19e06b44b600b2d744e1e533a9d77d10ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b38adf80dfc149834b6ca6ada35e6f19a0e82bc96befb41e6477d30078c9cb56
[INFO] running `Command { std: "docker" "start" "-a" "b38adf80dfc149834b6ca6ada35e6f19a0e82bc96befb41e6477d30078c9cb56", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]     Checking smallvec v1.13.1
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling tokio v1.26.0
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]    Compiling serde_json v1.0.113
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking parking_lot_core v0.9.9
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/signal-hook-registry-1.4.1/src/half_lock.rs:145:13
[INFO] [stdout]     |
[INFO] [stdout] 145 |             unsafe { libc::abort() };
[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 `signal-hook-registry` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "b38adf80dfc149834b6ca6ada35e6f19a0e82bc96befb41e6477d30078c9cb56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b38adf80dfc149834b6ca6ada35e6f19a0e82bc96befb41e6477d30078c9cb56", kill_on_drop: false }`
[INFO] [stdout] b38adf80dfc149834b6ca6ada35e6f19a0e82bc96befb41e6477d30078c9cb56