[INFO] cloning repository https://github.com/mattcollier/rust-regex-demo [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mattcollier/rust-regex-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattcollier%2Frust-regex-demo", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattcollier%2Frust-regex-demo'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] d98e8a0157ca13462a06fef05f919a4a0fd687b1 [INFO] checking mattcollier/rust-regex-demo against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattcollier%2Frust-regex-demo" "/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/mattcollier/rust-regex-demo 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/mattcollier/rust-regex-demo [INFO] finished tweaking git repo https://github.com/mattcollier/rust-regex-demo [INFO] tweaked toml for git repo https://github.com/mattcollier/rust-regex-demo written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/mattcollier/rust-regex-demo 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] 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] ff34bd383af6d29c548cb8f99b535891132b7ddf30046a57755a3436d6690978 [INFO] running `Command { std: "docker" "start" "-a" "ff34bd383af6d29c548cb8f99b535891132b7ddf30046a57755a3436d6690978", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ff34bd383af6d29c548cb8f99b535891132b7ddf30046a57755a3436d6690978", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ff34bd383af6d29c548cb8f99b535891132b7ddf30046a57755a3436d6690978", kill_on_drop: false }` [INFO] [stdout] ff34bd383af6d29c548cb8f99b535891132b7ddf30046a57755a3436d6690978 [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] b254c02c3335b8bf74fa318792fc301115304f0f4f4525e2bb9e9be29036dbb8 [INFO] running `Command { std: "docker" "start" "-a" "b254c02c3335b8bf74fa318792fc301115304f0f4f4525e2bb9e9be29036dbb8", kill_on_drop: false }` [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Checking regex-syntax v0.6.21 [INFO] [stderr] Checking thread_local v1.0.1 [INFO] [stderr] Checking aho-corasick v0.7.15 [INFO] [stderr] Checking regex v1.4.2 [INFO] [stderr] Checking regex-demo v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: field `value` is never read [INFO] [stdout] --> src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 4 | struct A<'a> { [INFO] [stdout] | - field in this struct [INFO] [stdout] 5 | value: &'a str, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `A` 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: field `value` is never read [INFO] [stdout] --> src/main.rs:10:5 [INFO] [stdout] | [INFO] [stdout] 9 | struct B<'a> { [INFO] [stdout] | - field in this struct [INFO] [stdout] 10 | value: &'a str, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `B` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `value` is never read [INFO] [stdout] --> src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 4 | struct A<'a> { [INFO] [stdout] | - field in this struct [INFO] [stdout] 5 | value: &'a str, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `A` 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: field `value` is never read [INFO] [stdout] --> src/main.rs:15:5 [INFO] [stdout] | [INFO] [stdout] 14 | struct C<'a> { [INFO] [stdout] | - field in this struct [INFO] [stdout] 15 | value: &'a str, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `C` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `value` is never read [INFO] [stdout] --> src/main.rs:10:5 [INFO] [stdout] | [INFO] [stdout] 9 | struct B<'a> { [INFO] [stdout] | - field in this struct [INFO] [stdout] 10 | value: &'a str, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `B` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `value` is never read [INFO] [stdout] --> src/main.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 19 | struct D<'a> { [INFO] [stdout] | - field in this struct [INFO] [stdout] 20 | value: &'a str, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `D` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `value` is never read [INFO] [stdout] --> src/main.rs:15:5 [INFO] [stdout] | [INFO] [stdout] 14 | struct C<'a> { [INFO] [stdout] | - field in this struct [INFO] [stdout] 15 | value: &'a str, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `C` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `value` is never read [INFO] [stdout] --> src/main.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 19 | struct D<'a> { [INFO] [stdout] | - field in this struct [INFO] [stdout] 20 | value: &'a str, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `D` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `a`, `b`, `c`, and `d` are never read [INFO] [stdout] --> src/main.rs:25:5 [INFO] [stdout] | [INFO] [stdout] 24 | struct Letters<'a> { [INFO] [stdout] | ------- fields in this struct [INFO] [stdout] 25 | a: A<'a>, [INFO] [stdout] | ^ [INFO] [stdout] 26 | b: B<'a>, [INFO] [stdout] | ^ [INFO] [stdout] 27 | c: C<'a>, [INFO] [stdout] | ^ [INFO] [stdout] 28 | d: D<'a>, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `Letters` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `a`, `b`, `c`, and `d` are never read [INFO] [stdout] --> src/main.rs:25:5 [INFO] [stdout] | [INFO] [stdout] 24 | struct Letters<'a> { [INFO] [stdout] | ------- fields in this struct [INFO] [stdout] 25 | a: A<'a>, [INFO] [stdout] | ^ [INFO] [stdout] 26 | b: B<'a>, [INFO] [stdout] | ^ [INFO] [stdout] 27 | c: C<'a>, [INFO] [stdout] | ^ [INFO] [stdout] 28 | d: D<'a>, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `Letters` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.37s [INFO] running `Command { std: "docker" "inspect" "b254c02c3335b8bf74fa318792fc301115304f0f4f4525e2bb9e9be29036dbb8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b254c02c3335b8bf74fa318792fc301115304f0f4f4525e2bb9e9be29036dbb8", kill_on_drop: false }` [INFO] [stdout] b254c02c3335b8bf74fa318792fc301115304f0f4f4525e2bb9e9be29036dbb8 [INFO] checking mattcollier/rust-regex-demo against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattcollier%2Frust-regex-demo" "/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/mattcollier/rust-regex-demo 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/mattcollier/rust-regex-demo [INFO] finished tweaking git repo https://github.com/mattcollier/rust-regex-demo [INFO] tweaked toml for git repo https://github.com/mattcollier/rust-regex-demo written to /workspace/builds/worker-7-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/mattcollier/rust-regex-demo 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-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] 4e261d41920854f96ae4eec693eaf34c813f1a5d5cf9fb877af67ef1a4eee283 [INFO] running `Command { std: "docker" "start" "-a" "4e261d41920854f96ae4eec693eaf34c813f1a5d5cf9fb877af67ef1a4eee283", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "4e261d41920854f96ae4eec693eaf34c813f1a5d5cf9fb877af67ef1a4eee283", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4e261d41920854f96ae4eec693eaf34c813f1a5d5cf9fb877af67ef1a4eee283", kill_on_drop: false }` [INFO] [stdout] 4e261d41920854f96ae4eec693eaf34c813f1a5d5cf9fb877af67ef1a4eee283 [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] 40a7caea4221567519239ed8039816523b10932d2bdb274188e32f6586e225a0 [INFO] running `Command { std: "docker" "start" "-a" "40a7caea4221567519239ed8039816523b10932d2bdb274188e32f6586e225a0", kill_on_drop: false }` [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Checking regex-syntax v0.6.21 [INFO] [stderr] Checking thread_local v1.0.1 [INFO] [stderr] Checking aho-corasick v0.7.15 [INFO] [stderr] Checking regex v1.4.2 [INFO] [stdout] error[E0282]: type annotations needed [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.4.2/src/exec.rs:836:13 [INFO] [stdout] | [INFO] [stdout] 836 | / match dfa::Fsm::reverse( [INFO] [stdout] 837 | | &self.ro.dfa_reverse, [INFO] [stdout] 838 | | self.cache.value(), [INFO] [stdout] 839 | | false, [INFO] [stdout] ... | [INFO] [stdout] 850 | | Quit => return Some(Quit), [INFO] [stdout] 851 | | }; [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] running `Command { std: "docker" "inspect" "40a7caea4221567519239ed8039816523b10932d2bdb274188e32f6586e225a0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "40a7caea4221567519239ed8039816523b10932d2bdb274188e32f6586e225a0", kill_on_drop: false }` [INFO] [stdout] 40a7caea4221567519239ed8039816523b10932d2bdb274188e32f6586e225a0