[INFO] cloning repository https://github.com/ConradKhakhria/liszp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ConradKhakhria/liszp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FConradKhakhria%2Fliszp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FConradKhakhria%2Fliszp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c9b04b931d42983ce36965cace382cfb1d70a07e
[INFO] checking ConradKhakhria/liszp against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FConradKhakhria%2Fliszp" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ConradKhakhria/liszp 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/ConradKhakhria/liszp
[INFO] finished tweaking git repo https://github.com/ConradKhakhria/liszp
[INFO] tweaked toml for git repo https://github.com/ConradKhakhria/liszp written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ConradKhakhria/liszp 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 snafu-derive v0.6.10
[INFO] [stderr]   Downloaded az v1.1.1
[INFO] [stderr]   Downloaded snafu v0.6.10
[INFO] [stderr]   Downloaded itertools v0.10.0
[INFO] [stderr]   Downloaded rug v1.12.0
[INFO] [stderr]   Downloaded gmp-mpfr-sys v1.4.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 4be250a98d3339d9087270cd055dde0a776f31669cd89722cce6484b29e2e305
[INFO] running `Command { std: "docker" "start" "-a" "4be250a98d3339d9087270cd055dde0a776f31669cd89722cce6484b29e2e305", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4be250a98d3339d9087270cd055dde0a776f31669cd89722cce6484b29e2e305", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4be250a98d3339d9087270cd055dde0a776f31669cd89722cce6484b29e2e305", kill_on_drop: false }`
[INFO] [stdout] 4be250a98d3339d9087270cd055dde0a776f31669cd89722cce6484b29e2e305
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] c15582dc2ce8be5660cc58dfe74f940b1b73af64cbd8442d7c0189ce3fe4904b
[INFO] running `Command { std: "docker" "start" "-a" "c15582dc2ce8be5660cc58dfe74f940b1b73af64cbd8442d7c0189ce3fe4904b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.4.5
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling az v1.1.1
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling rug v1.12.0
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]     Checking snafu v0.6.10
[INFO] [stderr]     Checking liszp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `rug` is imported redundantly
[INFO] [stdout]  --> src/eval/operators.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use rug;
[INFO] [stdout]   |     ^^^ the item `rug` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rug` is imported redundantly
[INFO] [stdout]   --> src/read.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use rug;
[INFO] [stdout]    |     ^^^ the item `rug` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rug` is imported redundantly
[INFO] [stdout]  --> src/eval/operators.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use rug;
[INFO] [stdout]   |     ^^^ the item `rug` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rug` is imported redundantly
[INFO] [stdout]   --> src/read.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use rug;
[INFO] [stdout]    |     ^^^ the item `rug` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/error.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let message = Rc::clone(&self.message);
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/error.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let message = Rc::clone(&self.message);
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 18s
[INFO] running `Command { std: "docker" "inspect" "c15582dc2ce8be5660cc58dfe74f940b1b73af64cbd8442d7c0189ce3fe4904b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c15582dc2ce8be5660cc58dfe74f940b1b73af64cbd8442d7c0189ce3fe4904b", kill_on_drop: false }`
[INFO] [stdout] c15582dc2ce8be5660cc58dfe74f940b1b73af64cbd8442d7c0189ce3fe4904b
[INFO] checking ConradKhakhria/liszp against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FConradKhakhria%2Fliszp" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ConradKhakhria/liszp 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/ConradKhakhria/liszp
[INFO] finished tweaking git repo https://github.com/ConradKhakhria/liszp
[INFO] tweaked toml for git repo https://github.com/ConradKhakhria/liszp written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ConradKhakhria/liszp 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 50264d7ee8390c8ba05821313166e4cb5d435a52c56b0cf6cbec75a617432adb
[INFO] running `Command { std: "docker" "start" "-a" "50264d7ee8390c8ba05821313166e4cb5d435a52c56b0cf6cbec75a617432adb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50264d7ee8390c8ba05821313166e4cb5d435a52c56b0cf6cbec75a617432adb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50264d7ee8390c8ba05821313166e4cb5d435a52c56b0cf6cbec75a617432adb", kill_on_drop: false }`
[INFO] [stdout] 50264d7ee8390c8ba05821313166e4cb5d435a52c56b0cf6cbec75a617432adb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 3687d8872b5d91a8a281226eb0f907cee3c08907faa706deb8aa06cee5a22da9
[INFO] running `Command { std: "docker" "start" "-a" "3687d8872b5d91a8a281226eb0f907cee3c08907faa706deb8aa06cee5a22da9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.4.5
[INFO] [stderr]    Compiling az v1.1.1
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling rug v1.12.0
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.5.4/src/exec.rs:848:13
[INFO] [stdout]     |
[INFO] [stdout] 848 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 849 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 850 | |                 self.cache.value(),
[INFO] [stdout] 851 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 862 | |                 Quit => return Some(Quit),
[INFO] [stdout] 863 | |             };
[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" "3687d8872b5d91a8a281226eb0f907cee3c08907faa706deb8aa06cee5a22da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3687d8872b5d91a8a281226eb0f907cee3c08907faa706deb8aa06cee5a22da9", kill_on_drop: false }`
[INFO] [stdout] 3687d8872b5d91a8a281226eb0f907cee3c08907faa706deb8aa06cee5a22da9