[INFO] cloning repository https://github.com/bnlrnz/rustlings-solution [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bnlrnz/rustlings-solution" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbnlrnz%2Frustlings-solution", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbnlrnz%2Frustlings-solution'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] d1e0b59839eed64306e8d2cd37fc873d0cc82e52 [INFO] checking bnlrnz/rustlings-solution against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbnlrnz%2Frustlings-solution" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/bnlrnz/rustlings-solution 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/bnlrnz/rustlings-solution [INFO] finished tweaking git repo https://github.com/bnlrnz/rustlings-solution [INFO] tweaked toml for git repo https://github.com/bnlrnz/rustlings-solution written to /workspace/builds/worker-6-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/bnlrnz/rustlings-solution 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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 5c620cfcad836fbe13e6652d440f90376eff3cf84ff04f6ca09a1daae01b1514 [INFO] running `Command { std: "docker" "start" "-a" "5c620cfcad836fbe13e6652d440f90376eff3cf84ff04f6ca09a1daae01b1514", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "5c620cfcad836fbe13e6652d440f90376eff3cf84ff04f6ca09a1daae01b1514", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5c620cfcad836fbe13e6652d440f90376eff3cf84ff04f6ca09a1daae01b1514", kill_on_drop: false }` [INFO] [stdout] 5c620cfcad836fbe13e6652d440f90376eff3cf84ff04f6ca09a1daae01b1514 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 02eb2e6aafc4f4c3d26c818907a750f2bf96fbe6df7a181ffecc3d20b73ca4fe [INFO] running `Command { std: "docker" "start" "-a" "02eb2e6aafc4f4c3d26c818907a750f2bf96fbe6df7a181ffecc3d20b73ca4fe", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.58 [INFO] [stderr] Compiling autocfg v0.1.4 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling syn v0.15.34 [INFO] [stderr] Compiling serde v1.0.92 [INFO] [stderr] Checking unicode-width v0.1.5 [INFO] [stderr] Compiling ryu v0.2.8 [INFO] [stderr] Checking rand_jitter v0.1.4 [INFO] [stderr] Checking scopeguard v1.0.0 [INFO] [stderr] Compiling parking_lot_core v0.5.0 [INFO] [stderr] Compiling parking_lot v0.8.0 [INFO] [stderr] Checking bitflags v1.0.4 [INFO] [stderr] Checking predicates-core v1.0.0 [INFO] [stderr] Checking same-file v1.0.4 [INFO] [stderr] Compiling escargot v0.4.0 [INFO] [stderr] Checking itoa v0.4.4 [INFO] [stderr] Checking log v0.4.6 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking lock_api v0.2.0 [INFO] [stderr] Checking vec_map v0.8.1 [INFO] [stderr] Checking difference v2.0.0 [INFO] [stderr] Checking normalize-line-endings v0.2.2 [INFO] [stderr] Checking walkdir v2.2.7 [INFO] [stderr] Checking strsim v0.8.0 [INFO] [stderr] Checking treeline v0.1.0 [INFO] [stderr] Checking glob v0.3.0 [INFO] [stderr] Checking predicates-tree v1.0.0 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling num-traits v0.2.8 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Checking termios v0.3.1 [INFO] [stderr] Checking iovec v0.1.2 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Checking clicolors-control v1.0.0 [INFO] [stderr] Checking atty v0.2.11 [INFO] [stderr] Checking inotify-sys v0.1.3 [INFO] [stderr] Checking filetime v0.2.5 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Checking inotify v0.7.0 [INFO] [stderr] Checking console v0.8.0 [INFO] [stderr] Checking mio v0.6.19 [INFO] [stderr] Checking mio-extras v2.0.5 [INFO] [stderr] Checking notify v4.0.15 [INFO] [stderr] Checking number_prefix v0.2.8 [INFO] [stderr] Checking float-cmp v0.4.0 [INFO] [stderr] Checking predicates v1.0.1 [INFO] [stderr] Checking console v0.7.7 [INFO] [stderr] Checking indicatif v0.10.3 [INFO] [stderr] Compiling serde_derive v1.0.92 [INFO] [stderr] Checking serde_json v1.0.39 [INFO] [stderr] Checking toml v0.4.10 [INFO] [stderr] Checking rustlings v4.3.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking assert_cmd v0.11.1 [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.22s [INFO] running `Command { std: "docker" "inspect" "02eb2e6aafc4f4c3d26c818907a750f2bf96fbe6df7a181ffecc3d20b73ca4fe", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "02eb2e6aafc4f4c3d26c818907a750f2bf96fbe6df7a181ffecc3d20b73ca4fe", kill_on_drop: false }` [INFO] [stdout] 02eb2e6aafc4f4c3d26c818907a750f2bf96fbe6df7a181ffecc3d20b73ca4fe [INFO] checking bnlrnz/rustlings-solution against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbnlrnz%2Frustlings-solution" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/bnlrnz/rustlings-solution 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/bnlrnz/rustlings-solution [INFO] finished tweaking git repo https://github.com/bnlrnz/rustlings-solution [INFO] tweaked toml for git repo https://github.com/bnlrnz/rustlings-solution written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/bnlrnz/rustlings-solution 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 7fb7fb95d6bd50dc5d418f44ce935127bcea694f37ee36c9ff9fb4da7a0fd663 [INFO] running `Command { std: "docker" "start" "-a" "7fb7fb95d6bd50dc5d418f44ce935127bcea694f37ee36c9ff9fb4da7a0fd663", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "7fb7fb95d6bd50dc5d418f44ce935127bcea694f37ee36c9ff9fb4da7a0fd663", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7fb7fb95d6bd50dc5d418f44ce935127bcea694f37ee36c9ff9fb4da7a0fd663", kill_on_drop: false }` [INFO] [stdout] 7fb7fb95d6bd50dc5d418f44ce935127bcea694f37ee36c9ff9fb4da7a0fd663 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 1105107b757d29b9fb72eb782150c31769dedbff6680a0bd24f807bfffae0183 [INFO] running `Command { std: "docker" "start" "-a" "1105107b757d29b9fb72eb782150c31769dedbff6680a0bd24f807bfffae0183", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.58 [INFO] [stderr] Compiling autocfg v0.1.4 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling syn v0.15.34 [INFO] [stderr] Compiling serde v1.0.92 [INFO] [stderr] Checking unicode-width v0.1.5 [INFO] [stderr] Compiling ryu v0.2.8 [INFO] [stderr] Checking rand_jitter v0.1.4 [INFO] [stderr] Checking scopeguard v1.0.0 [INFO] [stderr] Compiling parking_lot_core v0.5.0 [INFO] [stderr] Compiling parking_lot v0.8.0 [INFO] [stderr] Checking bitflags v1.0.4 [INFO] [stderr] Compiling escargot v0.4.0 [INFO] [stderr] Checking predicates-core v1.0.0 [INFO] [stderr] Checking itoa v0.4.4 [INFO] [stderr] Checking log v0.4.6 [INFO] [stderr] Checking lock_api v0.2.0 [INFO] [stderr] Checking same-file v1.0.4 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking normalize-line-endings v0.2.2 [INFO] [stderr] Checking treeline v0.1.0 [INFO] [stderr] Checking walkdir v2.2.7 [INFO] [stderr] Checking difference v2.0.0 [INFO] [stderr] Checking strsim v0.8.0 [INFO] [stderr] Checking vec_map v0.8.1 [INFO] [stderr] Checking glob v0.3.0 [INFO] [stderr] Checking predicates-tree v1.0.0 [INFO] [stderr] Compiling num-traits v0.2.8 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Checking number_prefix v0.2.8 [INFO] [stderr] Checking float-cmp v0.4.0 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Checking iovec v0.1.2 [INFO] [stderr] Checking clicolors-control v1.0.0 [INFO] [stderr] Checking termios v0.3.1 [INFO] [stderr] Checking inotify-sys v0.1.3 [INFO] [stderr] Checking atty v0.2.11 [INFO] [stderr] Checking filetime v0.2.5 [INFO] [stderr] Checking predicates v1.0.1 [INFO] [stderr] Checking console v0.8.0 [INFO] [stderr] Checking inotify v0.7.0 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Checking mio v0.6.19 [INFO] [stderr] Checking mio-extras v2.0.5 [INFO] [stderr] Checking notify v4.0.15 [INFO] [stderr] Checking indicatif v0.10.3 [INFO] [stderr] Checking console v0.7.7 [INFO] [stderr] Compiling serde_derive v1.0.92 [INFO] [stderr] Checking serde_json v1.0.39 [INFO] [stderr] Checking toml v0.4.10 [INFO] [stderr] Checking rustlings v4.3.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking assert_cmd v0.11.1 [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.13s [INFO] running `Command { std: "docker" "inspect" "1105107b757d29b9fb72eb782150c31769dedbff6680a0bd24f807bfffae0183", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1105107b757d29b9fb72eb782150c31769dedbff6680a0bd24f807bfffae0183", kill_on_drop: false }` [INFO] [stdout] 1105107b757d29b9fb72eb782150c31769dedbff6680a0bd24f807bfffae0183