[INFO] fetching crate lector 0.1.0...
[INFO] checking lector-0.1.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate lector 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate lector 0.1.0 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 crates.io crate lector 0.1.0
[INFO] finished tweaking crates.io crate lector 0.1.0
[INFO] tweaked toml for crates.io crate lector 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate lector 0.1.0 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded termsize v0.1.6
[INFO] [stderr]   Downloaded ptyprocess v0.4.1
[INFO] [stderr]   Downloaded vt100 v0.15.2
[INFO] [stderr]   Downloaded vte v0.11.1
[INFO] [stderr]   Downloaded emojis v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 21689b66929c921c5d7410ee319a8a04db463c22bb9522212b24e41806a6f62b
[INFO] running `Command { std: "docker" "start" "-a" "21689b66929c921c5d7410ee319a8a04db463c22bb9522212b24e41806a6f62b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21689b66929c921c5d7410ee319a8a04db463c22bb9522212b24e41806a6f62b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21689b66929c921c5d7410ee319a8a04db463c22bb9522212b24e41806a6f62b", kill_on_drop: false }`
[INFO] [stdout] 21689b66929c921c5d7410ee319a8a04db463c22bb9522212b24e41806a6f62b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 27f2f46e35457213bd71e488a1587f620e0b1b5f0df45dbd53034d55dae92f8d
[INFO] running `Command { std: "docker" "start" "-a" "27f2f46e35457213bd71e488a1587f620e0b1b5f0df45dbd53034d55dae92f8d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]     Checking arrayvec v0.7.4
[INFO] [stderr]    Compiling anyhow v1.0.72
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]     Checking phf_shared v0.11.2
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling phf_generator v0.11.2
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling syn v2.0.27
[INFO] [stderr]     Checking similar v2.2.1
[INFO] [stderr]    Compiling vte_generate_state_changes v0.1.1
[INFO] [stderr]     Checking vte v0.11.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking nix v0.26.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking termsize v0.1.6
[INFO] [stderr]     Checking signal-hook-mio v0.2.3
[INFO] [stderr]     Checking vt100 v0.15.2
[INFO] [stderr]    Compiling phf_macros v0.11.2
[INFO] [stderr]     Checking ptyprocess v0.4.1
[INFO] [stderr]     Checking phf v0.11.2
[INFO] [stderr]     Checking emojis v0.6.0
[INFO] [stderr]     Checking lector v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `get_rate` is never used
[INFO] [stdout]   --> src/speech/mod.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Speech {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn get_rate(&self) -> f32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_rate` is never used
[INFO] [stdout]  --> src/speech/drivers/mod.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait Driver {
[INFO] [stdout]   |           ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 8 |     fn get_rate(&self) -> f32;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_rate` is never used
[INFO] [stdout]   --> src/speech/mod.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Speech {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn get_rate(&self) -> f32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_rate` is never used
[INFO] [stdout]  --> src/speech/drivers/mod.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait Driver {
[INFO] [stdout]   |           ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 8 |     fn get_rate(&self) -> f32;
[INFO] [stdout]   |        ^^^^^^^^
[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 4.47s
[INFO] running `Command { std: "docker" "inspect" "27f2f46e35457213bd71e488a1587f620e0b1b5f0df45dbd53034d55dae92f8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27f2f46e35457213bd71e488a1587f620e0b1b5f0df45dbd53034d55dae92f8d", kill_on_drop: false }`
[INFO] [stdout] 27f2f46e35457213bd71e488a1587f620e0b1b5f0df45dbd53034d55dae92f8d
[INFO] checking lector-0.1.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate lector 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate lector 0.1.0 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 crates.io crate lector 0.1.0
[INFO] finished tweaking crates.io crate lector 0.1.0
[INFO] tweaked toml for crates.io crate lector 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate lector 0.1.0 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 2c9ef6e600dd3f0de3f47b1bb2a5f7fcbe02748a83fe1b20162141de98bd3ded
[INFO] running `Command { std: "docker" "start" "-a" "2c9ef6e600dd3f0de3f47b1bb2a5f7fcbe02748a83fe1b20162141de98bd3ded", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c9ef6e600dd3f0de3f47b1bb2a5f7fcbe02748a83fe1b20162141de98bd3ded", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c9ef6e600dd3f0de3f47b1bb2a5f7fcbe02748a83fe1b20162141de98bd3ded", kill_on_drop: false }`
[INFO] [stdout] 2c9ef6e600dd3f0de3f47b1bb2a5f7fcbe02748a83fe1b20162141de98bd3ded
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 1137c572853136c7e09351ce5dc4583283ed91f0a3a15c44b0262de0e3ec2e82
[INFO] running `Command { std: "docker" "start" "-a" "1137c572853136c7e09351ce5dc4583283ed91f0a3a15c44b0262de0e3ec2e82", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]     Checking arrayvec v0.7.4
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling anyhow v1.0.72
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]     Checking phf_shared v0.11.2
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling phf_generator v0.11.2
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling syn v2.0.27
[INFO] [stderr]     Checking similar v2.2.1
[INFO] [stderr]    Compiling vte_generate_state_changes v0.1.1
[INFO] [stderr]     Checking vte v0.11.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking nix v0.26.2
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking termsize v0.1.6
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/signal-hook-registry-1.4.1/src/half_lock.rs:145:13
[INFO] [stdout]     |
[INFO] [stdout] 145 |             unsafe { libc::abort() };
[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 `signal-hook-registry` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "1137c572853136c7e09351ce5dc4583283ed91f0a3a15c44b0262de0e3ec2e82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1137c572853136c7e09351ce5dc4583283ed91f0a3a15c44b0262de0e3ec2e82", kill_on_drop: false }`
[INFO] [stdout] 1137c572853136c7e09351ce5dc4583283ed91f0a3a15c44b0262de0e3ec2e82