[INFO] cloning repository https://github.com/simlay/line-server-exercise
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/simlay/line-server-exercise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimlay%2Fline-server-exercise", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimlay%2Fline-server-exercise'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 50fd03db80bff6ca240c5529cbbdb868c7ff2725
[INFO] checking simlay/line-server-exercise against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimlay%2Fline-server-exercise" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/simlay/line-server-exercise 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/simlay/line-server-exercise
[INFO] finished tweaking git repo https://github.com/simlay/line-server-exercise
[INFO] tweaked toml for git repo https://github.com/simlay/line-server-exercise written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/simlay/line-server-exercise 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-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] eee630d22f1a093552f69520210d976a23d7b8f1268e6fa13d47c7091fee8e3e
[INFO] running `Command { std: "docker" "start" "-a" "eee630d22f1a093552f69520210d976a23d7b8f1268e6fa13d47c7091fee8e3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eee630d22f1a093552f69520210d976a23d7b8f1268e6fa13d47c7091fee8e3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eee630d22f1a093552f69520210d976a23d7b8f1268e6fa13d47c7091fee8e3e", kill_on_drop: false }`
[INFO] [stdout] eee630d22f1a093552f69520210d976a23d7b8f1268e6fa13d47c7091fee8e3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 76a68f946bdc386658a9c89da22379f22e67916ca993c0035142ae005e6e8aae
[INFO] running `Command { std: "docker" "start" "-a" "76a68f946bdc386658a9c89da22379f22e67916ca993c0035142ae005e6e8aae", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]     Checking utf8parse v0.2.1
[INFO] [stderr]     Checking anstyle v1.0.0
[INFO] [stderr]     Checking anstyle-query v1.0.0
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking strsim v0.11.0
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking lock_api v0.4.10
[INFO] [stderr]    Compiling anyhow v1.0.81
[INFO] [stderr]     Checking clap_lex v0.7.0
[INFO] [stderr]     Checking anstyle-parse v0.2.0
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking anstream v0.6.7
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking clap_builder v4.5.2
[INFO] [stderr]     Checking pretty_assertions v1.4.0
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking regex v1.8.4
[INFO] [stderr]     Checking parking_lot_core v0.9.8
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking mio v0.8.9
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking is-terminal v0.4.7
[INFO] [stderr]     Checking env_logger v0.10.2
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling clap_derive v4.5.4
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking clap v4.5.4
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking line-server-exercise v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.15s
[INFO] running `Command { std: "docker" "inspect" "76a68f946bdc386658a9c89da22379f22e67916ca993c0035142ae005e6e8aae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76a68f946bdc386658a9c89da22379f22e67916ca993c0035142ae005e6e8aae", kill_on_drop: false }`
[INFO] [stdout] 76a68f946bdc386658a9c89da22379f22e67916ca993c0035142ae005e6e8aae
[INFO] checking simlay/line-server-exercise against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimlay%2Fline-server-exercise" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/simlay/line-server-exercise 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/simlay/line-server-exercise
[INFO] finished tweaking git repo https://github.com/simlay/line-server-exercise
[INFO] tweaked toml for git repo https://github.com/simlay/line-server-exercise written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/simlay/line-server-exercise 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 6d27b7795b0c944f183314743ba3001f8d5ebc93060b9fe32e03e5f6af82dff8
[INFO] running `Command { std: "docker" "start" "-a" "6d27b7795b0c944f183314743ba3001f8d5ebc93060b9fe32e03e5f6af82dff8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d27b7795b0c944f183314743ba3001f8d5ebc93060b9fe32e03e5f6af82dff8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d27b7795b0c944f183314743ba3001f8d5ebc93060b9fe32e03e5f6af82dff8", kill_on_drop: false }`
[INFO] [stdout] 6d27b7795b0c944f183314743ba3001f8d5ebc93060b9fe32e03e5f6af82dff8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] a52761175e1df7735a80bd77ddd50acb54982f80df809d5260ae2f3ecc9761bf
[INFO] running `Command { std: "docker" "start" "-a" "a52761175e1df7735a80bd77ddd50acb54982f80df809d5260ae2f3ecc9761bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]     Checking utf8parse v0.2.1
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]     Checking anstyle-query v1.0.0
[INFO] [stderr]     Checking anstyle v1.0.0
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking lock_api v0.4.10
[INFO] [stderr]     Checking clap_lex v0.7.0
[INFO] [stderr]     Checking strsim v0.11.0
[INFO] [stderr]    Compiling anyhow v1.0.81
[INFO] [stderr]     Checking anstyle-parse v0.2.0
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking anstream v0.6.7
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking clap_builder v4.5.2
[INFO] [stderr]     Checking pretty_assertions v1.4.0
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking parking_lot_core v0.9.8
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking mio v0.8.9
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking regex v1.8.4
[INFO] [stderr]     Checking is-terminal v0.4.7
[INFO] [stderr]     Checking env_logger v0.10.2
[INFO] [stderr]    Compiling clap_derive v4.5.4
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking clap v4.5.4
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking line-server-exercise v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.19s
[INFO] running `Command { std: "docker" "inspect" "a52761175e1df7735a80bd77ddd50acb54982f80df809d5260ae2f3ecc9761bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a52761175e1df7735a80bd77ddd50acb54982f80df809d5260ae2f3ecc9761bf", kill_on_drop: false }`
[INFO] [stdout] a52761175e1df7735a80bd77ddd50acb54982f80df809d5260ae2f3ecc9761bf