[INFO] cloning repository https://github.com/m-hamashita/tokio-practice [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/m-hamashita/tokio-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-hamashita%2Ftokio-practice", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-hamashita%2Ftokio-practice'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 408d93d5c832418c7c915457bc24484f892d491f [INFO] checking m-hamashita/tokio-practice against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-hamashita%2Ftokio-practice" "/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/m-hamashita/tokio-practice 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/m-hamashita/tokio-practice [INFO] finished tweaking git repo https://github.com/m-hamashita/tokio-practice [INFO] tweaked toml for git repo https://github.com/m-hamashita/tokio-practice written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/m-hamashita/tokio-practice 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] c8dddf3899494c52cf7d2f47fe5cc0f2130cc5030fc7c53115bed9f26446f7e5 [INFO] running `Command { std: "docker" "start" "-a" "c8dddf3899494c52cf7d2f47fe5cc0f2130cc5030fc7c53115bed9f26446f7e5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c8dddf3899494c52cf7d2f47fe5cc0f2130cc5030fc7c53115bed9f26446f7e5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c8dddf3899494c52cf7d2f47fe5cc0f2130cc5030fc7c53115bed9f26446f7e5", kill_on_drop: false }` [INFO] [stdout] c8dddf3899494c52cf7d2f47fe5cc0f2130cc5030fc7c53115bed9f26446f7e5 [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] a46ab78e6395392ddf1e193a9ba6d3b6877494194fac34b258d6577b5ee6ab76 [INFO] running `Command { std: "docker" "start" "-a" "a46ab78e6395392ddf1e193a9ba6d3b6877494194fac34b258d6577b5ee6ab76", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v1.1.0 [INFO] [stderr] Compiling proc-macro2 v1.0.66 [INFO] [stderr] Compiling unicode-ident v1.0.11 [INFO] [stderr] Compiling libc v0.2.148 [INFO] [stderr] Compiling futures-core v0.3.28 [INFO] [stderr] Compiling semver v1.0.19 [INFO] [stderr] Checking memchr v2.6.3 [INFO] [stderr] Compiling crossbeam-utils v0.8.16 [INFO] [stderr] Compiling futures-channel v0.3.28 [INFO] [stderr] Compiling futures-task v0.3.28 [INFO] [stderr] Checking pin-project-lite v0.2.13 [INFO] [stderr] Checking futures-sink v0.3.28 [INFO] [stderr] Compiling futures-util v0.3.28 [INFO] [stderr] Checking scopeguard v1.2.0 [INFO] [stderr] Checking futures-io v0.3.28 [INFO] [stderr] Checking pin-utils v0.1.0 [INFO] [stderr] Compiling regex-syntax v0.7.5 [INFO] [stderr] Checking adler v1.0.2 [INFO] [stderr] Checking gimli v0.28.0 [INFO] [stderr] Compiling rayon-core v1.12.0 [INFO] [stderr] Checking miniz_oxide v0.7.1 [INFO] [stderr] Compiling glob v0.3.1 [INFO] [stderr] Compiling slab v0.4.9 [INFO] [stderr] Compiling memoffset v0.9.0 [INFO] [stderr] Compiling crossbeam-epoch v0.9.15 [INFO] [stderr] Compiling relative-path v1.9.0 [INFO] [stderr] Compiling cfg-if v1.0.0 [INFO] [stderr] Checking rustc-demangle v0.1.23 [INFO] [stderr] Compiling anyhow v1.0.75 [INFO] [stderr] Checking either v1.9.0 [INFO] [stderr] Compiling aho-corasick v1.1.1 [INFO] [stderr] Checking object v0.32.1 [INFO] [stderr] Checking futures-timer v3.0.2 [INFO] [stderr] Compiling rustc_version v0.4.0 [INFO] [stderr] Compiling quote v1.0.33 [INFO] [stderr] Compiling cc v1.0.83 [INFO] [stderr] Checking signal-hook-registry v1.4.1 [INFO] [stderr] Checking mio v0.8.8 [INFO] [stderr] Checking num_cpus v1.16.0 [INFO] [stderr] Compiling rstest_macros v0.18.2 [INFO] [stderr] Compiling syn v2.0.31 [INFO] [stderr] Checking crossbeam-deque v0.8.3 [INFO] [stderr] Compiling backtrace v0.3.69 [INFO] [stderr] Checking rayon v1.8.0 [INFO] [stderr] Compiling regex-automata v0.3.9 [INFO] [stderr] Checking addr2line v0.21.0 [INFO] [stderr] Compiling regex v1.9.6 [INFO] [stderr] Compiling futures-macro v0.3.28 [INFO] [stderr] Compiling tokio-macros v2.1.0 [INFO] [stderr] Checking tokio v1.32.0 [INFO] [stderr] Checking futures-executor v0.3.28 [INFO] [stderr] Checking futures v0.3.28 [INFO] [stderr] Checking rstest v0.18.2 [INFO] [stderr] Checking tokio-practice v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: function `spawn_blocking` is never used [INFO] [stdout] --> src/spawn.rs:8:14 [INFO] [stdout] | [INFO] [stdout] 8 | pub async fn spawn_blocking( [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 17.16s [INFO] running `Command { std: "docker" "inspect" "a46ab78e6395392ddf1e193a9ba6d3b6877494194fac34b258d6577b5ee6ab76", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a46ab78e6395392ddf1e193a9ba6d3b6877494194fac34b258d6577b5ee6ab76", kill_on_drop: false }` [INFO] [stdout] a46ab78e6395392ddf1e193a9ba6d3b6877494194fac34b258d6577b5ee6ab76 [INFO] checking m-hamashita/tokio-practice against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-hamashita%2Ftokio-practice" "/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/m-hamashita/tokio-practice 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/m-hamashita/tokio-practice [INFO] finished tweaking git repo https://github.com/m-hamashita/tokio-practice [INFO] tweaked toml for git repo https://github.com/m-hamashita/tokio-practice written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/m-hamashita/tokio-practice 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] ace982114c51600da4365d5ac3c9576b506e283240182c9c73620833b8e51443 [INFO] running `Command { std: "docker" "start" "-a" "ace982114c51600da4365d5ac3c9576b506e283240182c9c73620833b8e51443", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ace982114c51600da4365d5ac3c9576b506e283240182c9c73620833b8e51443", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ace982114c51600da4365d5ac3c9576b506e283240182c9c73620833b8e51443", kill_on_drop: false }` [INFO] [stdout] ace982114c51600da4365d5ac3c9576b506e283240182c9c73620833b8e51443 [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] 784fd7374dc7b2d6afc20f5bba7cf54050ea7a9390a893a85d8f81961086a08a [INFO] running `Command { std: "docker" "start" "-a" "784fd7374dc7b2d6afc20f5bba7cf54050ea7a9390a893a85d8f81961086a08a", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v1.1.0 [INFO] [stderr] Compiling proc-macro2 v1.0.66 [INFO] [stderr] Compiling unicode-ident v1.0.11 [INFO] [stderr] Compiling libc v0.2.148 [INFO] [stderr] Compiling semver v1.0.19 [INFO] [stderr] Compiling futures-core v0.3.28 [INFO] [stderr] Checking memchr v2.6.3 [INFO] [stderr] Compiling crossbeam-utils v0.8.16 [INFO] [stderr] Compiling futures-task v0.3.28 [INFO] [stderr] Compiling futures-channel v0.3.28 [INFO] [stderr] Compiling futures-util v0.3.28 [INFO] [stderr] Checking futures-sink v0.3.28 [INFO] [stderr] Checking pin-project-lite v0.2.13 [INFO] [stderr] Checking futures-io v0.3.28 [INFO] [stderr] Checking scopeguard v1.2.0 [INFO] [stderr] Checking pin-utils v0.1.0 [INFO] [stderr] Compiling regex-syntax v0.7.5 [INFO] [stderr] Compiling rayon-core v1.12.0 [INFO] [stderr] Checking gimli v0.28.0 [INFO] [stderr] Checking adler v1.0.2 [INFO] [stderr] Checking miniz_oxide v0.7.1 [INFO] [stderr] Checking rustc-demangle v0.1.23 [INFO] [stderr] Compiling glob v0.3.1 [INFO] [stderr] Compiling cfg-if v1.0.0 [INFO] [stderr] Compiling anyhow v1.0.75 [INFO] [stderr] Compiling relative-path v1.9.0 [INFO] [stderr] Checking either v1.9.0 [INFO] [stderr] Compiling slab v0.4.9 [INFO] [stderr] Compiling memoffset v0.9.0 [INFO] [stderr] Compiling crossbeam-epoch v0.9.15 [INFO] [stderr] Compiling aho-corasick v1.1.1 [INFO] [stderr] Compiling rustc_version v0.4.0 [INFO] [stderr] Checking futures-timer v3.0.2 [INFO] [stderr] Checking object v0.32.1 [INFO] [stderr] Compiling rstest_macros v0.18.2 [INFO] [stderr] Compiling quote v1.0.33 [INFO] [stderr] Compiling syn v2.0.31 [INFO] [stderr] Checking crossbeam-deque v0.8.3 [INFO] [stderr] Compiling cc v1.0.83 [INFO] [stderr] Checking mio v0.8.8 [INFO] [stderr] Checking num_cpus v1.16.0 [INFO] [stderr] Checking signal-hook-registry v1.4.1 [INFO] [stderr] Checking rayon v1.8.0 [INFO] [stderr] Compiling backtrace v0.3.69 [INFO] [stderr] Compiling regex-automata v0.3.9 [INFO] [stderr] Checking addr2line v0.21.0 [INFO] [stderr] Compiling regex v1.9.6 [INFO] [stderr] Compiling futures-macro v0.3.28 [INFO] [stderr] Compiling tokio-macros v2.1.0 [INFO] [stderr] Checking tokio v1.32.0 [INFO] [stderr] Checking futures-executor v0.3.28 [INFO] [stderr] Checking futures v0.3.28 [INFO] [stderr] Checking rstest v0.18.2 [INFO] [stderr] Checking tokio-practice v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: function `spawn_blocking` is never used [INFO] [stdout] --> src/spawn.rs:8:14 [INFO] [stdout] | [INFO] [stdout] 8 | pub async fn spawn_blocking( [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 17.22s [INFO] running `Command { std: "docker" "inspect" "784fd7374dc7b2d6afc20f5bba7cf54050ea7a9390a893a85d8f81961086a08a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "784fd7374dc7b2d6afc20f5bba7cf54050ea7a9390a893a85d8f81961086a08a", kill_on_drop: false }` [INFO] [stdout] 784fd7374dc7b2d6afc20f5bba7cf54050ea7a9390a893a85d8f81961086a08a