[INFO] cloning repository https://github.com/mitch292/rustlings-solutions [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mitch292/rustlings-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmitch292%2Frustlings-solutions", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmitch292%2Frustlings-solutions'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 83bbd9e82e98b4ec1ab81a1d55bb8688e920a905 [INFO] checking mitch292/rustlings-solutions against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmitch292%2Frustlings-solutions" "/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/mitch292/rustlings-solutions on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/mitch292/rustlings-solutions [INFO] finished tweaking git repo https://github.com/mitch292/rustlings-solutions [INFO] tweaked toml for git repo https://github.com/mitch292/rustlings-solutions written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/mitch292/rustlings-solutions 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 9 packages [INFO] [stderr] Adding console v0.7.7 (latest: v0.15.8) [INFO] [stderr] Adding console v0.15.1 (latest: v0.15.8) [INFO] [stderr] Updating indicatif v0.9.0 -> v0.10.3 (latest: v0.17.8) [INFO] [stderr] Updating inotify v0.6.1 -> v0.7.1 (latest: v0.10.2) [INFO] [stderr] Updating notify v4.0.12 -> v4.0.17 (latest: v6.1.1) [INFO] [stderr] Adding number_prefix v0.2.8 (latest: v0.4.0) [INFO] [stderr] Adding once_cell v1.19.0 [INFO] [stderr] Adding terminal_size v0.1.17 (latest: v0.3.0) [INFO] [stderr] Updating winapi v0.3.7 -> v0.3.9 [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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 267f1e3aaa150ee9817c06f9b9fc8ad226f601a37c421660088841fa5032d3b3 [INFO] running `Command { std: "docker" "start" "-a" "267f1e3aaa150ee9817c06f9b9fc8ad226f601a37c421660088841fa5032d3b3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "267f1e3aaa150ee9817c06f9b9fc8ad226f601a37c421660088841fa5032d3b3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "267f1e3aaa150ee9817c06f9b9fc8ad226f601a37c421660088841fa5032d3b3", kill_on_drop: false }` [INFO] [stdout] 267f1e3aaa150ee9817c06f9b9fc8ad226f601a37c421660088841fa5032d3b3 [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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] abb3f510c2cfa13e0a8db8f97a79f1ca8af18d288b691b4f72bee90d4b79ecdf [INFO] running `Command { std: "docker" "start" "-a" "abb3f510c2cfa13e0a8db8f97a79f1ca8af18d288b691b4f72bee90d4b79ecdf", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.58 [INFO] [stderr] Compiling autocfg v0.1.4 [INFO] [stderr] Checking rand_core v0.4.0 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling memchr v2.2.0 [INFO] [stderr] Compiling syn v0.15.34 [INFO] [stderr] Checking lazy_static v1.3.0 [INFO] [stderr] Checking rand_core v0.3.1 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Compiling serde v1.0.92 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Compiling num-traits v0.2.8 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Checking ucd-util v0.1.3 [INFO] [stderr] Compiling regex v1.1.6 [INFO] [stderr] Checking regex-syntax v0.6.6 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Checking aho-corasick v0.7.3 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Compiling parking_lot_core v0.5.0 [INFO] [stderr] Checking rand_xorshift v0.1.1 [INFO] [stderr] Checking rand_isaac v0.1.1 [INFO] [stderr] Checking rand_hc v0.1.0 [INFO] [stderr] Checking thread_local v0.3.6 [INFO] [stderr] Checking rand_jitter v0.1.4 [INFO] [stderr] Checking log v0.4.6 [INFO] [stderr] Checking unicode-width v0.1.5 [INFO] [stderr] Checking utf8-ranges v1.0.2 [INFO] [stderr] Compiling parking_lot v0.8.0 [INFO] [stderr] Checking scopeguard v1.0.0 [INFO] [stderr] Checking smallvec v0.6.9 [INFO] [stderr] Compiling ryu v0.2.8 [INFO] [stderr] Checking lock_api v0.2.0 [INFO] [stderr] Checking iovec v0.1.2 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Checking bitflags v1.0.4 [INFO] [stderr] Checking slab v0.4.2 [INFO] [stderr] Checking atty v0.2.11 [INFO] [stderr] Checking inotify-sys v0.1.3 [INFO] [stderr] Checking terminal_size v0.1.17 [INFO] [stderr] Checking lazycell v1.2.1 [INFO] [stderr] Checking mio v0.6.19 [INFO] [stderr] Checking predicates-core v1.0.0 [INFO] [stderr] Checking once_cell v1.19.0 [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 walkdir v2.2.7 [INFO] [stderr] Checking console v0.15.1 [INFO] [stderr] Checking inotify v0.7.1 [INFO] [stderr] Checking float-cmp v0.4.0 [INFO] [stderr] Checking number_prefix v0.2.8 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking filetime v0.2.5 [INFO] [stderr] Checking clicolors-control v1.0.0 [INFO] [stderr] Checking termios v0.3.1 [INFO] [stderr] Checking vec_map v0.8.1 [INFO] [stderr] Checking mio-extras v2.0.5 [INFO] [stderr] Checking normalize-line-endings v0.2.2 [INFO] [stderr] Checking treeline v0.1.0 [INFO] [stderr] Checking strsim v0.8.0 [INFO] [stderr] Checking ansi_term v0.11.0 [INFO] [stderr] Checking difference v2.0.0 [INFO] [stderr] Checking predicates-tree v1.0.0 [INFO] [stderr] Checking notify v4.0.17 [INFO] [stderr] Checking glob v0.3.0 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Compiling serde_derive v1.0.92 [INFO] [stderr] Checking predicates v1.0.1 [INFO] [stderr] Checking console v0.7.7 [INFO] [stderr] Checking indicatif v0.10.3 [INFO] [stderr] Checking serde_json v1.0.39 [INFO] [stderr] Checking toml v0.4.10 [INFO] [stderr] Checking rustlings v2.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking assert_cmd v0.11.1 [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.97s [INFO] running `Command { std: "docker" "inspect" "abb3f510c2cfa13e0a8db8f97a79f1ca8af18d288b691b4f72bee90d4b79ecdf", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "abb3f510c2cfa13e0a8db8f97a79f1ca8af18d288b691b4f72bee90d4b79ecdf", kill_on_drop: false }` [INFO] [stdout] abb3f510c2cfa13e0a8db8f97a79f1ca8af18d288b691b4f72bee90d4b79ecdf [INFO] checking mitch292/rustlings-solutions against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmitch292%2Frustlings-solutions" "/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/mitch292/rustlings-solutions on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/mitch292/rustlings-solutions [INFO] finished tweaking git repo https://github.com/mitch292/rustlings-solutions [INFO] tweaked toml for git repo https://github.com/mitch292/rustlings-solutions written to /workspace/builds/worker-7-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/mitch292/rustlings-solutions 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] a7138cc2187fdb098bc079d0a3142157bbf740cb98f4ff9e4f8f10f440cc90ca [INFO] running `Command { std: "docker" "start" "-a" "a7138cc2187fdb098bc079d0a3142157bbf740cb98f4ff9e4f8f10f440cc90ca", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a7138cc2187fdb098bc079d0a3142157bbf740cb98f4ff9e4f8f10f440cc90ca", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a7138cc2187fdb098bc079d0a3142157bbf740cb98f4ff9e4f8f10f440cc90ca", kill_on_drop: false }` [INFO] [stdout] a7138cc2187fdb098bc079d0a3142157bbf740cb98f4ff9e4f8f10f440cc90ca [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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c0d4ef763f57499aea17f7957a5a7b6afa3779ebe88428fb94db6011748e3890 [INFO] running `Command { std: "docker" "start" "-a" "c0d4ef763f57499aea17f7957a5a7b6afa3779ebe88428fb94db6011748e3890", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.58 [INFO] [stderr] Compiling autocfg v0.1.4 [INFO] [stderr] Checking rand_core v0.4.0 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling memchr v2.2.0 [INFO] [stderr] Checking lazy_static v1.3.0 [INFO] [stderr] Compiling syn v0.15.34 [INFO] [stderr] Checking ucd-util v0.1.3 [INFO] [stderr] Checking rand_core v0.3.1 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Compiling serde v1.0.92 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling num-traits v0.2.8 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling regex v1.1.6 [INFO] [stderr] Compiling parking_lot_core v0.5.0 [INFO] [stderr] Checking aho-corasick v0.7.3 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Checking rand_hc v0.1.0 [INFO] [stderr] Checking rand_xorshift v0.1.1 [INFO] [stderr] Checking rand_isaac v0.1.1 [INFO] [stderr] Checking regex-syntax v0.6.6 [INFO] [stderr] Checking rand_jitter v0.1.4 [INFO] [stderr] Checking thread_local v0.3.6 [INFO] [stderr] Checking log v0.4.6 [INFO] [stderr] Checking utf8-ranges v1.0.2 [INFO] [stderr] Checking unicode-width v0.1.5 [INFO] [stderr] Compiling parking_lot v0.8.0 [INFO] [stderr] Compiling ryu v0.2.8 [INFO] [stderr] Checking scopeguard v1.0.0 [INFO] [stderr] Checking smallvec v0.6.9 [INFO] [stderr] Checking lock_api v0.2.0 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Checking iovec v0.1.2 [INFO] [stderr] Checking bitflags v1.0.4 [INFO] [stderr] Checking slab v0.4.2 [INFO] [stderr] Checking terminal_size v0.1.17 [INFO] [stderr] Checking inotify-sys v0.1.3 [INFO] [stderr] Checking atty v0.2.11 [INFO] [stderr] Compiling escargot v0.4.0 [INFO] [stderr] Checking predicates-core v1.0.0 [INFO] [stderr] Checking once_cell v1.19.0 [INFO] [stderr] Checking mio v0.6.19 [INFO] [stderr] Checking itoa v0.4.4 [INFO] [stderr] Checking lazycell v1.2.1 [INFO] [stderr] Checking same-file v1.0.4 [INFO] [stderr] Checking console v0.15.1 [INFO] [stderr] Checking inotify v0.7.1 [INFO] [stderr] Checking walkdir v2.2.7 [INFO] [stderr] Checking float-cmp v0.4.0 [INFO] [stderr] Checking number_prefix v0.2.8 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking filetime v0.2.5 [INFO] [stderr] Checking termios v0.3.1 [INFO] [stderr] Checking clicolors-control v1.0.0 [INFO] [stderr] Checking normalize-line-endings v0.2.2 [INFO] [stderr] Checking vec_map v0.8.1 [INFO] [stderr] Checking treeline v0.1.0 [INFO] [stderr] Checking strsim v0.8.0 [INFO] [stderr] Checking ansi_term v0.11.0 [INFO] [stderr] Checking mio-extras v2.0.5 [INFO] [stderr] Checking difference v2.0.0 [INFO] [stderr] Checking predicates-tree v1.0.0 [INFO] [stderr] Checking glob v0.3.0 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Checking notify v4.0.17 [INFO] [stderr] Compiling serde_derive v1.0.92 [INFO] [stdout] error[E0282]: type annotations needed [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.1.6/src/exec.rs:797:13 [INFO] [stdout] | [INFO] [stdout] 797 | / match dfa::Fsm::reverse( [INFO] [stdout] 798 | | &self.ro.dfa_reverse, [INFO] [stdout] 799 | | self.cache, [INFO] [stdout] 800 | | false, [INFO] [stdout] ... | [INFO] [stdout] 811 | | Quit => return Some(Quit), [INFO] [stdout] 812 | | }; [INFO] [stdout] | |_____________^ cannot infer type [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0282`. [INFO] [stdout] [INFO] [stderr] error: could not compile `regex` (lib) due to 2 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "c0d4ef763f57499aea17f7957a5a7b6afa3779ebe88428fb94db6011748e3890", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c0d4ef763f57499aea17f7957a5a7b6afa3779ebe88428fb94db6011748e3890", kill_on_drop: false }` [INFO] [stdout] c0d4ef763f57499aea17f7957a5a7b6afa3779ebe88428fb94db6011748e3890