[INFO] cloning repository https://github.com/emarth/temp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emarth/temp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femarth%2Ftemp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femarth%2Ftemp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 473bf656f8041b079f8e62b2e7eaf062a4319b47
[INFO] checking emarth/temp against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femarth%2Ftemp" "/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/emarth/temp 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/emarth/temp
[INFO] finished tweaking git repo https://github.com/emarth/temp
[INFO] tweaked toml for git repo https://github.com/emarth/temp written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/emarth/temp 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 docopt v1.1.1
[INFO] [stderr]   Downloaded rustls-webpki v0.101.1
[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] 70f93172aacbc6448231708d4e4a19c7351cbd536eb634021397e09d82e88452
[INFO] running `Command { std: "docker" "start" "-a" "70f93172aacbc6448231708d4e4a19c7351cbd536eb634021397e09d82e88452", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70f93172aacbc6448231708d4e4a19c7351cbd536eb634021397e09d82e88452", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70f93172aacbc6448231708d4e4a19c7351cbd536eb634021397e09d82e88452", kill_on_drop: false }`
[INFO] [stdout] 70f93172aacbc6448231708d4e4a19c7351cbd536eb634021397e09d82e88452
[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] 712b978d4a92a73e26f15dffc3a9249697ef0fdde4e58d46ad061e42a2a1a606
[INFO] running `Command { std: "docker" "start" "-a" "712b978d4a92a73e26f15dffc3a9249697ef0fdde4e58d46ad061e42a2a1a606", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]    Compiling serde v1.0.164
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]    Compiling rustls v0.21.5
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking rustls-pemfile v1.0.2
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking regex v1.8.4
[INFO] [stderr]     Checking env_logger v0.9.3
[INFO] [stderr]    Compiling serde_derive v1.0.164
[INFO] [stderr]     Checking rustls-webpki v0.101.1
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]     Checking docopt v1.1.1
[INFO] [stderr]     Checking mtls v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `docopt::Docopt`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use docopt::Docopt;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rustls` is imported redundantly
[INFO] [stdout]   --> src/main.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 | use rustls::{self, RootCertStore};
[INFO] [stdout]    |              ^^^^ the item `rustls` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `docopt::Docopt`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use docopt::Docopt;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rustls` is imported redundantly
[INFO] [stdout]   --> src/main.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 | use rustls::{self, RootCertStore};
[INFO] [stdout]    |              ^^^^ the item `rustls` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `version`
[INFO] [stdout]    --> src/main.rs:616:9
[INFO] [stdout]     |
[INFO] [stdout] 616 |     let version = env!("CARGO_PKG_NAME").to_string() + ", version: " + env!("CARGO_PKG_VERSION");
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_version`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `version`
[INFO] [stdout]    --> src/main.rs:616:9
[INFO] [stdout]     |
[INFO] [stdout] 616 |     let version = env!("CARGO_PKG_NAME").to_string() + ", version: " + env!("CARGO_PKG_VERSION");
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_version`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `USAGE` is never used
[INFO] [stdout]    --> src/main.rs:395:7
[INFO] [stdout]     |
[INFO] [stdout] 395 | const USAGE: &str = "
[INFO] [stdout]     |       ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `USAGE` is never used
[INFO] [stdout]    --> src/main.rs:395:7
[INFO] [stdout]     |
[INFO] [stdout] 395 | const USAGE: &str = "
[INFO] [stdout]     |       ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.59s
[INFO] running `Command { std: "docker" "inspect" "712b978d4a92a73e26f15dffc3a9249697ef0fdde4e58d46ad061e42a2a1a606", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "712b978d4a92a73e26f15dffc3a9249697ef0fdde4e58d46ad061e42a2a1a606", kill_on_drop: false }`
[INFO] [stdout] 712b978d4a92a73e26f15dffc3a9249697ef0fdde4e58d46ad061e42a2a1a606
[INFO] checking emarth/temp against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femarth%2Ftemp" "/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/emarth/temp 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/emarth/temp
[INFO] finished tweaking git repo https://github.com/emarth/temp
[INFO] tweaked toml for git repo https://github.com/emarth/temp written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/emarth/temp 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] 0302b40cc1cb9f36430ed2ccee025738a00cfed024673ea8a132cc0838727ae4
[INFO] running `Command { std: "docker" "start" "-a" "0302b40cc1cb9f36430ed2ccee025738a00cfed024673ea8a132cc0838727ae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0302b40cc1cb9f36430ed2ccee025738a00cfed024673ea8a132cc0838727ae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0302b40cc1cb9f36430ed2ccee025738a00cfed024673ea8a132cc0838727ae4", kill_on_drop: false }`
[INFO] [stdout] 0302b40cc1cb9f36430ed2ccee025738a00cfed024673ea8a132cc0838727ae4
[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] 025ebaf98517904c9241d82598fbe7493826ea3be2b937116f2e1b99e8f9dbab
[INFO] running `Command { std: "docker" "start" "-a" "025ebaf98517904c9241d82598fbe7493826ea3be2b937116f2e1b99e8f9dbab", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]    Compiling serde v1.0.164
[INFO] [stderr]    Compiling rustls v0.21.5
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking rustls-pemfile v1.0.2
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking regex v1.8.4
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.8.4/src/exec.rs:899:13
[INFO] [stdout]     |
[INFO] [stdout] 899 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 900 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 901 | |                 self.cache.value(),
[INFO] [stdout] 902 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 913 | |                 Quit => return Some(Quit),
[INFO] [stdout] 914 | |             };
[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" "025ebaf98517904c9241d82598fbe7493826ea3be2b937116f2e1b99e8f9dbab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "025ebaf98517904c9241d82598fbe7493826ea3be2b937116f2e1b99e8f9dbab", kill_on_drop: false }`
[INFO] [stdout] 025ebaf98517904c9241d82598fbe7493826ea3be2b937116f2e1b99e8f9dbab