[INFO] cloning repository https://github.com/PurpleMyst/russet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PurpleMyst/russet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Frusset", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Frusset'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b903cf417caa9b95e8590e4846c197931e97e65c
[INFO] checking PurpleMyst/russet against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Frusset" "/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/PurpleMyst/russet 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/PurpleMyst/russet
[INFO] finished tweaking git repo https://github.com/PurpleMyst/russet
[INFO] tweaked toml for git repo https://github.com/PurpleMyst/russet written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/PurpleMyst/russet 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 regex v0.2.6
[INFO] [stderr]   Downloaded aho-corasick v0.6.4
[INFO] [stderr]   Downloaded memchr v2.0.1
[INFO] [stderr]   Downloaded regex-syntax v0.4.2
[INFO] [stderr]   Downloaded thread_local v0.3.5
[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] d10480d56165c246e051da2de7a595130eb502787925346a72c8b171376e8f09
[INFO] running `Command { std: "docker" "start" "-a" "d10480d56165c246e051da2de7a595130eb502787925346a72c8b171376e8f09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d10480d56165c246e051da2de7a595130eb502787925346a72c8b171376e8f09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d10480d56165c246e051da2de7a595130eb502787925346a72c8b171376e8f09", kill_on_drop: false }`
[INFO] [stdout] d10480d56165c246e051da2de7a595130eb502787925346a72c8b171376e8f09
[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] 5351c69406e6aa5e5b11f46c5c9f42b646635e714b45f403beff5a30fa468005
[INFO] running `Command { std: "docker" "start" "-a" "5351c69406e6aa5e5b11f46c5c9f42b646635e714b45f403beff5a30fa468005", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.36
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.4.2
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking regex v0.2.6
[INFO] [stderr]     Checking russet v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/tokenizer.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 | /         lazy_static! {
[INFO] [stdout] 35 | |             static ref RE: Regex = {
[INFO] [stdout] 36 | |                 let regexp = EXPRESSIONS.iter()
[INFO] [stdout] 37 | |                                         .map(|&(name, expr)| format!("(?P<{}>{})", name, expr))
[INFO] [stdout] ...  |
[INFO] [stdout] 42 | |             };
[INFO] [stdout] 43 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/tokenizer.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 | /         lazy_static! {
[INFO] [stdout] 35 | |             static ref RE: Regex = {
[INFO] [stdout] 36 | |                 let regexp = EXPRESSIONS.iter()
[INFO] [stdout] 37 | |                                         .map(|&(name, expr)| format!("(?P<{}>{})", name, expr))
[INFO] [stdout] ...  |
[INFO] [stdout] 42 | |             };
[INFO] [stdout] 43 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `line`, `column`, `kind`, and `value` are never read
[INFO] [stdout]   --> src/tokenizer.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Token<'t> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 19 |     line: usize,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 20 |     column: usize,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 21 |
[INFO] [stdout] 22 |     kind: &'static str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 23 |     value: &'t str,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` 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: fields `line`, `column`, `kind`, and `value` are never read
[INFO] [stdout]   --> src/tokenizer.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Token<'t> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 19 |     line: usize,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 20 |     column: usize,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 21 |
[INFO] [stdout] 22 |     kind: &'static str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 23 |     value: &'t str,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `Command { std: "docker" "inspect" "5351c69406e6aa5e5b11f46c5c9f42b646635e714b45f403beff5a30fa468005", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5351c69406e6aa5e5b11f46c5c9f42b646635e714b45f403beff5a30fa468005", kill_on_drop: false }`
[INFO] [stdout] 5351c69406e6aa5e5b11f46c5c9f42b646635e714b45f403beff5a30fa468005
[INFO] checking PurpleMyst/russet against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Frusset" "/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/PurpleMyst/russet 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/PurpleMyst/russet
[INFO] finished tweaking git repo https://github.com/PurpleMyst/russet
[INFO] tweaked toml for git repo https://github.com/PurpleMyst/russet written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/PurpleMyst/russet 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] ad851e28b0e518698b1814a5979d72c0691a2db7234d25870d5bc82481bc7da4
[INFO] running `Command { std: "docker" "start" "-a" "ad851e28b0e518698b1814a5979d72c0691a2db7234d25870d5bc82481bc7da4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad851e28b0e518698b1814a5979d72c0691a2db7234d25870d5bc82481bc7da4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad851e28b0e518698b1814a5979d72c0691a2db7234d25870d5bc82481bc7da4", kill_on_drop: false }`
[INFO] [stdout] ad851e28b0e518698b1814a5979d72c0691a2db7234d25870d5bc82481bc7da4
[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] 29d38a5e1d299cb90ad91277c25ddd0e2abe271522391f5544c29b45b13f3cfa
[INFO] running `Command { std: "docker" "start" "-a" "29d38a5e1d299cb90ad91277c25ddd0e2abe271522391f5544c29b45b13f3cfa", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.36
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.4.2
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking regex v0.2.6
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-0.2.6/src/exec.rs:742:13
[INFO] [stdout]     |
[INFO] [stdout] 742 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 743 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 744 | |                 self.cache,
[INFO] [stdout] 745 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 752 | |                 Quit => return Some(Quit),
[INFO] [stdout] 753 | |             };
[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" "29d38a5e1d299cb90ad91277c25ddd0e2abe271522391f5544c29b45b13f3cfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29d38a5e1d299cb90ad91277c25ddd0e2abe271522391f5544c29b45b13f3cfa", kill_on_drop: false }`
[INFO] [stdout] 29d38a5e1d299cb90ad91277c25ddd0e2abe271522391f5544c29b45b13f3cfa