[INFO] cloning repository https://github.com/aptend/rlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aptend/rlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faptend%2Frlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faptend%2Frlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 04bc68c436826c76a648bacc401fe6e1ece4294c
[INFO] checking aptend/rlox against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faptend%2Frlox" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aptend/rlox 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/aptend/rlox
[INFO] finished tweaking git repo https://github.com/aptend/rlox
[INFO] tweaked toml for git repo https://github.com/aptend/rlox written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/aptend/rlox 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-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] fd32001eeeef5c9bcecdc842d6105cd51274cdf8f0a95653db055705461201fc
[INFO] running `Command { std: "docker" "start" "-a" "fd32001eeeef5c9bcecdc842d6105cd51274cdf8f0a95653db055705461201fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd32001eeeef5c9bcecdc842d6105cd51274cdf8f0a95653db055705461201fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd32001eeeef5c9bcecdc842d6105cd51274cdf8f0a95653db055705461201fc", kill_on_drop: false }`
[INFO] [stdout] fd32001eeeef5c9bcecdc842d6105cd51274cdf8f0a95653db055705461201fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] b71d4b42dc892feaea72ce8e5ada4059f3b9ce63d17d7aad8bfc935933810e2a
[INFO] running `Command { std: "docker" "start" "-a" "b71d4b42dc892feaea72ce8e5ada4059f3b9ce63d17d7aad8bfc935933810e2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking vm v0.1.0 (/opt/rustwide/workdir/vm)
[INFO] [stderr]     Checking rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/interpreter/value.rs:46:62
[INFO] [stdout]    |
[INFO] [stdout] 46 |             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout]    |                                                              ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Callable` does not implement `Deref`, so calling `deref` on `&Callable` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 46 -             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout] 46 +             Value::Callable(c) => write!(f, "{:?}", c.deref()),
[INFO] [stdout]    |
[INFO] [stdout] help: if you meant to clone `Callable`, implement `Clone` for it
[INFO] [stdout]   --> src/interpreter/callable.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 + #[derive(Clone)]
[INFO] [stdout] 25 | pub struct Callable {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&&Callable` instead of dereferencing the inner type
[INFO] [stdout]   --> src/interpreter/value.rs:46:54
[INFO] [stdout]    |
[INFO] [stdout] 46 |             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout]    |                                                      ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/interpreter/value.rs:46:62
[INFO] [stdout]    |
[INFO] [stdout] 46 |             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout]    |                                                              ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Callable` does not implement `Deref`, so calling `deref` on `&Callable` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 46 -             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout] 46 +             Value::Callable(c) => write!(f, "{:?}", c.deref()),
[INFO] [stdout]    |
[INFO] [stdout] help: if you meant to clone `Callable`, implement `Clone` for it
[INFO] [stdout]   --> src/interpreter/callable.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 + #[derive(Clone)]
[INFO] [stdout] 25 | pub struct Callable {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&&Callable` instead of dereferencing the inner type
[INFO] [stdout]   --> src/interpreter/value.rs:46:54
[INFO] [stdout]    |
[INFO] [stdout] 46 |             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout]    |                                                      ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` 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 2.16s
[INFO] running `Command { std: "docker" "inspect" "b71d4b42dc892feaea72ce8e5ada4059f3b9ce63d17d7aad8bfc935933810e2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b71d4b42dc892feaea72ce8e5ada4059f3b9ce63d17d7aad8bfc935933810e2a", kill_on_drop: false }`
[INFO] [stdout] b71d4b42dc892feaea72ce8e5ada4059f3b9ce63d17d7aad8bfc935933810e2a
[INFO] checking aptend/rlox against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faptend%2Frlox" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aptend/rlox 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/aptend/rlox
[INFO] finished tweaking git repo https://github.com/aptend/rlox
[INFO] tweaked toml for git repo https://github.com/aptend/rlox written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/aptend/rlox 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 32412b0609a5bae6f4160d1b7df577f6558e22f21619764e91ee0ce28ddafdb6
[INFO] running `Command { std: "docker" "start" "-a" "32412b0609a5bae6f4160d1b7df577f6558e22f21619764e91ee0ce28ddafdb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32412b0609a5bae6f4160d1b7df577f6558e22f21619764e91ee0ce28ddafdb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32412b0609a5bae6f4160d1b7df577f6558e22f21619764e91ee0ce28ddafdb6", kill_on_drop: false }`
[INFO] [stdout] 32412b0609a5bae6f4160d1b7df577f6558e22f21619764e91ee0ce28ddafdb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 830a2837fbb4ea4ed13383dedf74e0f48eec3ce9789f1d754914e97f2d817c45
[INFO] running `Command { std: "docker" "start" "-a" "830a2837fbb4ea4ed13383dedf74e0f48eec3ce9789f1d754914e97f2d817c45", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking atty v0.2.14
[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" "830a2837fbb4ea4ed13383dedf74e0f48eec3ce9789f1d754914e97f2d817c45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "830a2837fbb4ea4ed13383dedf74e0f48eec3ce9789f1d754914e97f2d817c45", kill_on_drop: false }`
[INFO] [stdout] 830a2837fbb4ea4ed13383dedf74e0f48eec3ce9789f1d754914e97f2d817c45