[INFO] cloning repository https://github.com/gpwclark/learnrust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gpwclark/learnrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgpwclark%2Flearnrust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgpwclark%2Flearnrust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] fc02c9b4e669a3865709ba3108457a9e86a8df2b [INFO] checking gpwclark/learnrust against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgpwclark%2Flearnrust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/gpwclark/learnrust 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/gpwclark/learnrust [INFO] finished tweaking git repo https://github.com/gpwclark/learnrust [INFO] tweaked toml for git repo https://github.com/gpwclark/learnrust written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/gpwclark/learnrust 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] Downloading crates ... [INFO] [stderr] Downloaded confy v0.3.1 [INFO] [stderr] Downloaded directories v0.10.0 [INFO] [stderr] Downloaded enum-display-derive v0.1.1 [INFO] [stderr] Downloaded syn v1.0.68 [INFO] [stderr] Downloaded libc v0.2.92 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] b14b377d41d74cde17609b63bb3a800e80771581998030c83b88bc7f68946217 [INFO] running `Command { std: "docker" "start" "-a" "b14b377d41d74cde17609b63bb3a800e80771581998030c83b88bc7f68946217", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b14b377d41d74cde17609b63bb3a800e80771581998030c83b88bc7f68946217", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b14b377d41d74cde17609b63bb3a800e80771581998030c83b88bc7f68946217", kill_on_drop: false }` [INFO] [stdout] b14b377d41d74cde17609b63bb3a800e80771581998030c83b88bc7f68946217 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 68a5a72eaf3f390ce6555f417f01c622896ee07e9eada1c97887d3360696db43 [INFO] running `Command { std: "docker" "start" "-a" "68a5a72eaf3f390ce6555f417f01c622896ee07e9eada1c97887d3360696db43", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.26 [INFO] [stderr] Compiling syn v1.0.68 [INFO] [stderr] Compiling serde_derive v1.0.125 [INFO] [stderr] Compiling serde v1.0.125 [INFO] [stderr] Compiling libc v0.2.92 [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Checking rand_core v0.4.2 [INFO] [stderr] Checking directories v0.10.0 [INFO] [stderr] Checking regex-syntax v0.6.23 [INFO] [stderr] Checking rand_core v0.3.1 [INFO] [stderr] Checking aho-corasick v0.7.15 [INFO] [stderr] Compiling quote v1.0.9 [INFO] [stderr] Checking rand v0.5.6 [INFO] [stderr] Checking regex v1.4.5 [INFO] [stderr] Compiling enum-display-derive v0.1.1 [INFO] [stderr] Checking toml v0.4.10 [INFO] [stderr] Checking confy v0.3.1 [INFO] [stderr] Checking learn v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: struct `Password` is never constructed [INFO] [stdout] --> src/advent_of_code/mod.rs:47:16 [INFO] [stdout] | [INFO] [stdout] 47 | pub struct Password { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Password` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `make_password`, `is_valid_new`, and `is_valid` are never used [INFO] [stdout] --> src/advent_of_code/mod.rs:55:16 [INFO] [stdout] | [INFO] [stdout] 54 | impl Password { [INFO] [stdout] | ------------- associated items in this implementation [INFO] [stdout] 55 | pub fn new(line: &str) -> Option { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 59 | fn make_password(line: &str) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 82 | pub fn is_valid_new(&self) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 101 | pub fn is_valid(&self) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `solve_puzzle_1` is never used [INFO] [stdout] --> src/advent_of_code/mod.rs:205:12 [INFO] [stdout] | [INFO] [stdout] 205 | pub fn solve_puzzle_1() -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `solve_puzzle_2` is never used [INFO] [stdout] --> src/advent_of_code/mod.rs:217:12 [INFO] [stdout] | [INFO] [stdout] 217 | pub fn solve_puzzle_2() -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `get` are never used [INFO] [stdout] --> src/advent_of_code/mod.rs:242:16 [INFO] [stdout] | [INFO] [stdout] 241 | impl CircArr { [INFO] [stdout] | ------------ associated items in this implementation [INFO] [stdout] 242 | pub fn new(arr: Vec) -> CircArr { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 248 | pub fn get(&self, idx: usize) -> u8 { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `solve_puzzle_1` is never used [INFO] [stdout] --> src/advent_of_code/mod.rs:278:12 [INFO] [stdout] | [INFO] [stdout] 278 | pub fn solve_puzzle_1() -> u32 { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `solve_puzzle_2` is never used [INFO] [stdout] --> src/advent_of_code/mod.rs:300:12 [INFO] [stdout] | [INFO] [stdout] 300 | pub fn solve_puzzle_2() {} [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `bar` and `tup` are never read [INFO] [stdout] --> src/data_structures/mod.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 3 | struct MyStruct { [INFO] [stdout] | -------- fields in this struct [INFO] [stdout] 4 | foo: String, [INFO] [stdout] 5 | bar: bool, [INFO] [stdout] | ^^^ [INFO] [stdout] 6 | tup: (u32, u32), [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `MyStruct` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `bar` and `tup` are never read [INFO] [stdout] --> src/data_structures/mod.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 3 | struct MyStruct { [INFO] [stdout] | -------- fields in this struct [INFO] [stdout] 4 | foo: String, [INFO] [stdout] 5 | bar: bool, [INFO] [stdout] | ^^^ [INFO] [stdout] 6 | tup: (u32, u32), [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `MyStruct` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [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 5.42s [INFO] running `Command { std: "docker" "inspect" "68a5a72eaf3f390ce6555f417f01c622896ee07e9eada1c97887d3360696db43", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "68a5a72eaf3f390ce6555f417f01c622896ee07e9eada1c97887d3360696db43", kill_on_drop: false }` [INFO] [stdout] 68a5a72eaf3f390ce6555f417f01c622896ee07e9eada1c97887d3360696db43 [INFO] checking gpwclark/learnrust against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgpwclark%2Flearnrust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/gpwclark/learnrust 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/gpwclark/learnrust [INFO] finished tweaking git repo https://github.com/gpwclark/learnrust [INFO] tweaked toml for git repo https://github.com/gpwclark/learnrust written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/gpwclark/learnrust 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 46eacfc16c728a7e97d12368b08ad3856b9f371ffee83c4aa5039af589a32d2a [INFO] running `Command { std: "docker" "start" "-a" "46eacfc16c728a7e97d12368b08ad3856b9f371ffee83c4aa5039af589a32d2a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "46eacfc16c728a7e97d12368b08ad3856b9f371ffee83c4aa5039af589a32d2a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "46eacfc16c728a7e97d12368b08ad3856b9f371ffee83c4aa5039af589a32d2a", kill_on_drop: false }` [INFO] [stdout] 46eacfc16c728a7e97d12368b08ad3856b9f371ffee83c4aa5039af589a32d2a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] a1ff4286b84330a045b82f2256334e999487317590b4559a843058f1c7cc03e9 [INFO] running `Command { std: "docker" "start" "-a" "a1ff4286b84330a045b82f2256334e999487317590b4559a843058f1c7cc03e9", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.26 [INFO] [stderr] Compiling syn v1.0.68 [INFO] [stderr] Compiling serde_derive v1.0.125 [INFO] [stderr] Compiling serde v1.0.125 [INFO] [stderr] Compiling libc v0.2.92 [INFO] [stderr] Checking rand_core v0.4.2 [INFO] [stderr] Checking directories v0.10.0 [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Checking regex-syntax v0.6.23 [INFO] [stderr] Checking rand_core v0.3.1 [INFO] [stderr] Checking aho-corasick v0.7.15 [INFO] [stderr] Compiling quote v1.0.9 [INFO] [stderr] Checking rand v0.5.6 [INFO] [stderr] Checking regex v1.4.5 [INFO] [stdout] error[E0282]: type annotations needed [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.4.5/src/exec.rs:851:13 [INFO] [stdout] | [INFO] [stdout] 851 | / match dfa::Fsm::reverse( [INFO] [stdout] 852 | | &self.ro.dfa_reverse, [INFO] [stdout] 853 | | self.cache.value(), [INFO] [stdout] 854 | | false, [INFO] [stdout] ... | [INFO] [stdout] 865 | | Quit => return Some(Quit), [INFO] [stdout] 866 | | }; [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" "a1ff4286b84330a045b82f2256334e999487317590b4559a843058f1c7cc03e9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a1ff4286b84330a045b82f2256334e999487317590b4559a843058f1c7cc03e9", kill_on_drop: false }` [INFO] [stdout] a1ff4286b84330a045b82f2256334e999487317590b4559a843058f1c7cc03e9