[INFO] cloning repository https://github.com/LearningOS/rust-rustlings-2023-autumn-zszbyzsz
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LearningOS/rust-rustlings-2023-autumn-zszbyzsz" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-2023-autumn-zszbyzsz", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-2023-autumn-zszbyzsz'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b7d2ad33a1f61a8549e19128b8455e76bbb07bee
[INFO] checking LearningOS/rust-rustlings-2023-autumn-zszbyzsz against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-2023-autumn-zszbyzsz" "/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/LearningOS/rust-rustlings-2023-autumn-zszbyzsz on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-zszbyzsz
[INFO] finished tweaking git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-zszbyzsz
[INFO] tweaked toml for git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-zszbyzsz written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-zszbyzsz 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ced7ec6fe7dc7f19808e3095678d3cad9cbf9d8b3af1fb4452b904cf82cc829
[INFO] running `Command { std: "docker" "start" "-a" "8ced7ec6fe7dc7f19808e3095678d3cad9cbf9d8b3af1fb4452b904cf82cc829", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ced7ec6fe7dc7f19808e3095678d3cad9cbf9d8b3af1fb4452b904cf82cc829", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ced7ec6fe7dc7f19808e3095678d3cad9cbf9d8b3af1fb4452b904cf82cc829", kill_on_drop: false }`
[INFO] [stdout] 8ced7ec6fe7dc7f19808e3095678d3cad9cbf9d8b3af1fb4452b904cf82cc829
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6aada89f8d2ae1d9d23c4f21bbfb76a0b62c33792d7f4ded3f9d87ff12ff074
[INFO] running `Command { std: "docker" "start" "-a" "d6aada89f8d2ae1d9d23c4f21bbfb76a0b62c33792d7f4ded3f9d87ff12ff074", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.64
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde v1.0.171
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]     Checking regex-syntax v0.7.4
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_json v1.0.102
[INFO] [stderr]     Checking itoa v1.0.8
[INFO] [stderr]     Checking ryu v1.0.14
[INFO] [stderr]    Compiling tokio v1.29.1
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]    Compiling argh_shared v0.1.10
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]     Checking walkdir v2.3.3
[INFO] [stderr]    Compiling syn v2.0.25
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking parking_lot_core v0.9.8
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking console v0.15.7
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking filetime v0.2.21
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking pin-project-lite v0.2.10
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]     Checking predicates-tree v1.0.9
[INFO] [stderr]     Checking home v0.5.5
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking notify v4.0.17
[INFO] [stderr]     Checking regex-automata v0.3.3
[INFO] [stderr]    Compiling argh_derive v0.1.10
[INFO] [stderr]     Checking regex v1.9.1
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]     Checking indicatif v0.16.2
[INFO] [stderr]    Compiling serde_derive v1.0.171
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]     Checking argh v0.1.10
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]     Checking rustlings v5.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.45s
[INFO] running `Command { std: "docker" "inspect" "d6aada89f8d2ae1d9d23c4f21bbfb76a0b62c33792d7f4ded3f9d87ff12ff074", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6aada89f8d2ae1d9d23c4f21bbfb76a0b62c33792d7f4ded3f9d87ff12ff074", kill_on_drop: false }`
[INFO] [stdout] d6aada89f8d2ae1d9d23c4f21bbfb76a0b62c33792d7f4ded3f9d87ff12ff074
[INFO] checking LearningOS/rust-rustlings-2023-autumn-zszbyzsz against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-2023-autumn-zszbyzsz" "/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/LearningOS/rust-rustlings-2023-autumn-zszbyzsz on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-zszbyzsz
[INFO] finished tweaking git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-zszbyzsz
[INFO] tweaked toml for git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-zszbyzsz written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/rust-rustlings-2023-autumn-zszbyzsz 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a28d602b00df0328dfd321fdc38aa342af4a45fa2196a5a8cf8023bfec20492d
[INFO] running `Command { std: "docker" "start" "-a" "a28d602b00df0328dfd321fdc38aa342af4a45fa2196a5a8cf8023bfec20492d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a28d602b00df0328dfd321fdc38aa342af4a45fa2196a5a8cf8023bfec20492d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a28d602b00df0328dfd321fdc38aa342af4a45fa2196a5a8cf8023bfec20492d", kill_on_drop: false }`
[INFO] [stdout] a28d602b00df0328dfd321fdc38aa342af4a45fa2196a5a8cf8023bfec20492d
[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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ed34df627dd81a05f428b41b05abcc14a74b5b71e55d74bdd0c7edf784fe7f88
[INFO] running `Command { std: "docker" "start" "-a" "ed34df627dd81a05f428b41b05abcc14a74b5b71e55d74bdd0c7edf784fe7f88", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.64
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde v1.0.171
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]     Checking regex-syntax v0.7.4
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_json v1.0.102
[INFO] [stderr]     Checking itoa v1.0.8
[INFO] [stderr]     Checking ryu v1.0.14
[INFO] [stderr]    Compiling tokio v1.29.1
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling argh_shared v0.1.10
[INFO] [stderr]     Checking walkdir v2.3.3
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]    Compiling syn v2.0.25
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking parking_lot_core v0.9.8
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking filetime v0.2.21
[INFO] [stderr]     Checking console v0.15.7
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking pin-project-lite v0.2.10
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking predicates-tree v1.0.9
[INFO] [stderr]     Checking notify v4.0.17
[INFO] [stderr]     Checking home v0.5.5
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking regex-automata v0.3.3
[INFO] [stderr]    Compiling argh_derive v0.1.10
[INFO] [stderr]     Checking regex v1.9.1
[INFO] [stderr]     Checking argh v0.1.10
[INFO] [stderr]    Compiling serde_derive v1.0.171
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]     Checking indicatif v0.16.2
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]     Checking rustlings v5.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.75s
[INFO] running `Command { std: "docker" "inspect" "ed34df627dd81a05f428b41b05abcc14a74b5b71e55d74bdd0c7edf784fe7f88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed34df627dd81a05f428b41b05abcc14a74b5b71e55d74bdd0c7edf784fe7f88", kill_on_drop: false }`
[INFO] [stdout] ed34df627dd81a05f428b41b05abcc14a74b5b71e55d74bdd0c7edf784fe7f88