[INFO] cloning repository https://github.com/statianzo/imposters [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/statianzo/imposters" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstatianzo%2Fimposters", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstatianzo%2Fimposters'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 344a5027ba57464a424c1906376445b6e208cb57 [INFO] checking statianzo/imposters against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstatianzo%2Fimposters" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/statianzo/imposters 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/statianzo/imposters [INFO] finished tweaking git repo https://github.com/statianzo/imposters [INFO] tweaked toml for git repo https://github.com/statianzo/imposters written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/statianzo/imposters 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] Downloading crates ... [INFO] [stderr] Downloaded wincolor v0.1.6 [INFO] [stderr] Downloaded termcolor v0.3.6 [INFO] [stderr] Downloaded env_logger v0.5.10 [INFO] [stderr] Downloaded atty v0.2.10 [INFO] [stderr] Downloaded rand_core v0.2.1 [INFO] [stderr] Downloaded humantime v1.1.1 [INFO] [stderr] Downloaded aho-corasick v0.6.5 [INFO] [stderr] Downloaded ucd-util v0.1.1 [INFO] [stderr] Downloaded regex v1.0.1 [INFO] [stderr] Downloaded quickcheck v0.6.2 [INFO] [stderr] Downloaded regex-syntax v0.6.1 [INFO] [stderr] Downloaded rand v0.5.3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] b0b81ca930531c717be8cc32e160c6956c9e153d697fba4c01ccd343293144bb [INFO] running `Command { std: "docker" "start" "-a" "b0b81ca930531c717be8cc32e160c6956c9e153d697fba4c01ccd343293144bb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b0b81ca930531c717be8cc32e160c6956c9e153d697fba4c01ccd343293144bb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b0b81ca930531c717be8cc32e160c6956c9e153d697fba4c01ccd343293144bb", kill_on_drop: false }` [INFO] [stdout] b0b81ca930531c717be8cc32e160c6956c9e153d697fba4c01ccd343293144bb [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 53f01a9fb979c7c459ce45ce72c0a2a9971d607b387146946b3e309e2a8cc384 [INFO] running `Command { std: "docker" "start" "-a" "53f01a9fb979c7c459ce45ce72c0a2a9971d607b387146946b3e309e2a8cc384", kill_on_drop: false }` [INFO] [stderr] Checking libc v0.2.42 [INFO] [stderr] Checking void v1.0.2 [INFO] [stderr] Compiling regex v1.0.1 [INFO] [stderr] Checking ucd-util v0.1.1 [INFO] [stderr] Checking lazy_static v1.0.1 [INFO] [stderr] Checking cfg-if v0.1.4 [INFO] [stderr] Checking utf8-ranges v1.0.0 [INFO] [stderr] Checking quick-error v1.2.2 [INFO] [stderr] Checking termcolor v0.3.6 [INFO] [stderr] Checking rand_core v0.2.1 [INFO] [stderr] Checking imposters v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking log v0.4.3 [INFO] [stderr] Checking unreachable v1.0.0 [INFO] [stderr] Checking humantime v1.1.1 [INFO] [stderr] Checking regex-syntax v0.6.1 [INFO] [stderr] Checking thread_local v0.3.5 [INFO] [stdout] warning: struct `Mp4File` is never constructed [INFO] [stdout] --> src/ch10_patterns/adapter.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | struct Mp4File {} [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `track_words` is never used [INFO] [stdout] --> src/ch10_patterns/adapter.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 7 | impl Mp4File { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 8 | fn track_words(&self) -> String { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `OggFile` is never constructed [INFO] [stdout] --> src/ch10_patterns/adapter.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 13 | struct OggFile {} [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `retrieve_lyrics` is never used [INFO] [stdout] --> src/ch10_patterns/adapter.rs:15:8 [INFO] [stdout] | [INFO] [stdout] 14 | impl OggFile { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 15 | fn retrieve_lyrics(&self) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `CaptionedAudio` is never used [INFO] [stdout] --> src/ch10_patterns/adapter.rs:20:7 [INFO] [stdout] | [INFO] [stdout] 20 | trait CaptionedAudio { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking memchr v2.0.1 [INFO] [stderr] Checking atty v0.2.10 [INFO] [stderr] Checking rand v0.4.2 [INFO] [stderr] Checking rand v0.5.3 [INFO] [stderr] Checking aho-corasick v0.6.5 [INFO] [stderr] Checking env_logger v0.5.10 [INFO] [stderr] Checking quickcheck v0.6.2 [INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021 [INFO] [stdout] --> src/ch08_adv_algs/fib.rs:78:26 [INFO] [stdout] | [INFO] [stdout] 78 | let mut iter = a.into_iter(); [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: `#[warn(array_into_iter)]` on by default [INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity [INFO] [stdout] | [INFO] [stdout] 78 | let mut iter = a.iter(); [INFO] [stdout] | ~~~~ [INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value [INFO] [stdout] | [INFO] [stdout] 78 | let mut iter = IntoIterator::into_iter(a); [INFO] [stdout] | ++++++++++++++++++++++++ ~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.24s [INFO] running `Command { std: "docker" "inspect" "53f01a9fb979c7c459ce45ce72c0a2a9971d607b387146946b3e309e2a8cc384", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "53f01a9fb979c7c459ce45ce72c0a2a9971d607b387146946b3e309e2a8cc384", kill_on_drop: false }` [INFO] [stdout] 53f01a9fb979c7c459ce45ce72c0a2a9971d607b387146946b3e309e2a8cc384 [INFO] checking statianzo/imposters against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstatianzo%2Fimposters" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/statianzo/imposters 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/statianzo/imposters [INFO] finished tweaking git repo https://github.com/statianzo/imposters [INFO] tweaked toml for git repo https://github.com/statianzo/imposters written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/statianzo/imposters 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 16191b3afa97593a2171348491a9d3edb5781a732b60f49e7bfcc427a6d49c04 [INFO] running `Command { std: "docker" "start" "-a" "16191b3afa97593a2171348491a9d3edb5781a732b60f49e7bfcc427a6d49c04", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "16191b3afa97593a2171348491a9d3edb5781a732b60f49e7bfcc427a6d49c04", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "16191b3afa97593a2171348491a9d3edb5781a732b60f49e7bfcc427a6d49c04", kill_on_drop: false }` [INFO] [stdout] 16191b3afa97593a2171348491a9d3edb5781a732b60f49e7bfcc427a6d49c04 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 3c65e63ca97819b1624164a65be1e1080bea2a5f67b616feae373b883931cb4c [INFO] running `Command { std: "docker" "start" "-a" "3c65e63ca97819b1624164a65be1e1080bea2a5f67b616feae373b883931cb4c", kill_on_drop: false }` [INFO] [stderr] Checking libc v0.2.42 [INFO] [stderr] Checking void v1.0.2 [INFO] [stderr] Compiling regex v1.0.1 [INFO] [stderr] Checking ucd-util v0.1.1 [INFO] [stderr] Checking lazy_static v1.0.1 [INFO] [stderr] Checking utf8-ranges v1.0.0 [INFO] [stderr] Checking cfg-if v0.1.4 [INFO] [stderr] Checking quick-error v1.2.2 [INFO] [stderr] Checking termcolor v0.3.6 [INFO] [stderr] Checking rand_core v0.2.1 [INFO] [stderr] Checking imposters v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking log v0.4.3 [INFO] [stderr] Checking humantime v1.1.1 [INFO] [stderr] Checking unreachable v1.0.0 [INFO] [stderr] Checking regex-syntax v0.6.1 [INFO] [stdout] warning: struct `Mp4File` is never constructed [INFO] [stdout] --> src/ch10_patterns/adapter.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | struct Mp4File {} [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `track_words` is never used [INFO] [stdout] --> src/ch10_patterns/adapter.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 7 | impl Mp4File { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 8 | fn track_words(&self) -> String { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `OggFile` is never constructed [INFO] [stdout] --> src/ch10_patterns/adapter.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 13 | struct OggFile {} [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `retrieve_lyrics` is never used [INFO] [stdout] --> src/ch10_patterns/adapter.rs:15:8 [INFO] [stdout] | [INFO] [stdout] 14 | impl OggFile { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 15 | fn retrieve_lyrics(&self) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `CaptionedAudio` is never used [INFO] [stdout] --> src/ch10_patterns/adapter.rs:20:7 [INFO] [stdout] | [INFO] [stdout] 20 | trait CaptionedAudio { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking thread_local v0.3.5 [INFO] [stderr] Checking memchr v2.0.1 [INFO] [stderr] Checking atty v0.2.10 [INFO] [stderr] Checking rand v0.4.2 [INFO] [stderr] Checking rand v0.5.3 [INFO] [stderr] Checking aho-corasick v0.6.5 [INFO] [stdout] error[E0282]: type annotations needed [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.0.1/src/exec.rs:754:13 [INFO] [stdout] | [INFO] [stdout] 754 | / match dfa::Fsm::reverse( [INFO] [stdout] 755 | | &self.ro.dfa_reverse, [INFO] [stdout] 756 | | self.cache, [INFO] [stdout] 757 | | false, [INFO] [stdout] ... | [INFO] [stdout] 764 | | Quit => return Some(Quit), [INFO] [stdout] 765 | | }; [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" "3c65e63ca97819b1624164a65be1e1080bea2a5f67b616feae373b883931cb4c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3c65e63ca97819b1624164a65be1e1080bea2a5f67b616feae373b883931cb4c", kill_on_drop: false }` [INFO] [stdout] 3c65e63ca97819b1624164a65be1e1080bea2a5f67b616feae373b883931cb4c