[INFO] cloning repository https://github.com/arifd/rust-flatten-vs-concat-and-collect
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arifd/rust-flatten-vs-concat-and-collect" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farifd%2Frust-flatten-vs-concat-and-collect", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farifd%2Frust-flatten-vs-concat-and-collect'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 46b06b601c9053ad6e9b07463ec12a50ba4287d5
[INFO] checking arifd/rust-flatten-vs-concat-and-collect against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farifd%2Frust-flatten-vs-concat-and-collect" "/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/arifd/rust-flatten-vs-concat-and-collect 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/arifd/rust-flatten-vs-concat-and-collect
[INFO] finished tweaking git repo https://github.com/arifd/rust-flatten-vs-concat-and-collect
[INFO] tweaked toml for git repo https://github.com/arifd/rust-flatten-vs-concat-and-collect written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/arifd/rust-flatten-vs-concat-and-collect 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-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] adac393be5cd0e43fe0e2f13d2ab2f46bece370197581e05edfacc9d1f679766
[INFO] running `Command { std: "docker" "start" "-a" "adac393be5cd0e43fe0e2f13d2ab2f46bece370197581e05edfacc9d1f679766", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "adac393be5cd0e43fe0e2f13d2ab2f46bece370197581e05edfacc9d1f679766", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adac393be5cd0e43fe0e2f13d2ab2f46bece370197581e05edfacc9d1f679766", kill_on_drop: false }`
[INFO] [stdout] adac393be5cd0e43fe0e2f13d2ab2f46bece370197581e05edfacc9d1f679766
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ed24be929d4049cc25488dc41969e5a13089ca46892164cfefa80cbd55581e9
[INFO] running `Command { std: "docker" "start" "-a" "4ed24be929d4049cc25488dc41969e5a13089ca46892164cfefa80cbd55581e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling serde v1.0.189
[INFO] [stderr]    Compiling rustix v0.38.20
[INFO] [stderr]    Compiling serde_json v1.0.107
[INFO] [stderr]     Checking clap_lex v0.5.1
[INFO] [stderr]     Checking linux-raw-sys v0.4.10
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking clap_builder v4.4.6
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking rayon-core v1.12.0
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]     Checking is-terminal v0.4.9
[INFO] [stderr]     Checking rayon v1.8.0
[INFO] [stderr]     Checking clap v4.4.6
[INFO] [stderr]    Compiling serde_derive v1.0.189
[INFO] [stderr]     Checking ciborium v0.2.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stderr]     Checking arif v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.92s
[INFO] running `Command { std: "docker" "inspect" "4ed24be929d4049cc25488dc41969e5a13089ca46892164cfefa80cbd55581e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ed24be929d4049cc25488dc41969e5a13089ca46892164cfefa80cbd55581e9", kill_on_drop: false }`
[INFO] [stdout] 4ed24be929d4049cc25488dc41969e5a13089ca46892164cfefa80cbd55581e9
[INFO] checking arifd/rust-flatten-vs-concat-and-collect against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farifd%2Frust-flatten-vs-concat-and-collect" "/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/arifd/rust-flatten-vs-concat-and-collect on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/arifd/rust-flatten-vs-concat-and-collect
[INFO] finished tweaking git repo https://github.com/arifd/rust-flatten-vs-concat-and-collect
[INFO] tweaked toml for git repo https://github.com/arifd/rust-flatten-vs-concat-and-collect written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/arifd/rust-flatten-vs-concat-and-collect 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a9f5b668c48146eaec6ac4fe95c2342683b00ea489a633c7b225b2d0546aa2e8
[INFO] running `Command { std: "docker" "start" "-a" "a9f5b668c48146eaec6ac4fe95c2342683b00ea489a633c7b225b2d0546aa2e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a9f5b668c48146eaec6ac4fe95c2342683b00ea489a633c7b225b2d0546aa2e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9f5b668c48146eaec6ac4fe95c2342683b00ea489a633c7b225b2d0546aa2e8", kill_on_drop: false }`
[INFO] [stdout] a9f5b668c48146eaec6ac4fe95c2342683b00ea489a633c7b225b2d0546aa2e8
[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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5698b9a693299b55afbc8992c2adda8959d78537d44ca0b6597fd522672ff61c
[INFO] running `Command { std: "docker" "start" "-a" "5698b9a693299b55afbc8992c2adda8959d78537d44ca0b6597fd522672ff61c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling serde v1.0.189
[INFO] [stderr]    Compiling rustix v0.38.20
[INFO] [stderr]    Compiling serde_json v1.0.107
[INFO] [stderr]     Checking clap_lex v0.5.1
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking linux-raw-sys v0.4.10
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking clap_builder v4.4.6
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]     Checking rayon-core v1.12.0
[INFO] [stderr]     Checking rayon v1.8.0
[INFO] [stderr]     Checking is-terminal v0.4.9
[INFO] [stderr]     Checking clap v4.4.6
[INFO] [stderr]    Compiling serde_derive v1.0.189
[INFO] [stderr]     Checking ciborium v0.2.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stderr]     Checking arif v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.61s
[INFO] running `Command { std: "docker" "inspect" "5698b9a693299b55afbc8992c2adda8959d78537d44ca0b6597fd522672ff61c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5698b9a693299b55afbc8992c2adda8959d78537d44ca0b6597fd522672ff61c", kill_on_drop: false }`
[INFO] [stdout] 5698b9a693299b55afbc8992c2adda8959d78537d44ca0b6597fd522672ff61c