[INFO] cloning repository https://github.com/q231950/navigator64
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/q231950/navigator64" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fq231950%2Fnavigator64", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fq231950%2Fnavigator64'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c0f52c42b6e9c6b39e3de53068612537127f0834
[INFO] checking q231950/navigator64 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fq231950%2Fnavigator64" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/q231950/navigator64 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/q231950/navigator64
[INFO] finished tweaking git repo https://github.com/q231950/navigator64
[INFO] tweaked toml for git repo https://github.com/q231950/navigator64 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/q231950/navigator64 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 serialport v4.0.1
[INFO] [stderr]   Downloaded nix v0.16.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 50da5f50c230a24b0ccf7bbf30cc62029a0153d63dba46f7351f8b5e3595effb
[INFO] running `Command { std: "docker" "start" "-a" "50da5f50c230a24b0ccf7bbf30cc62029a0153d63dba46f7351f8b5e3595effb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50da5f50c230a24b0ccf7bbf30cc62029a0153d63dba46f7351f8b5e3595effb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50da5f50c230a24b0ccf7bbf30cc62029a0153d63dba46f7351f8b5e3595effb", kill_on_drop: false }`
[INFO] [stdout] 50da5f50c230a24b0ccf7bbf30cc62029a0153d63dba46f7351f8b5e3595effb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 5801e78a4788aba8ebff789e9a324f1691c74f989bc7d369c466e362a8dd546a
[INFO] running `Command { std: "docker" "start" "-a" "5801e78a4788aba8ebff789e9a324f1691c74f989bc7d369c466e362a8dd546a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]     Checking libudev v0.2.0
[INFO] [stderr]     Checking serialport v4.0.1
[INFO] [stderr]     Checking navigator64 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `slash`
[INFO] [stdout]   --> src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let slash: [u8; 8] = [  0b00000001,
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slash`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slash`
[INFO] [stdout]   --> src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let slash: [u8; 8] = [  0b00000001,
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slash`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]    --> src/main.rs:22:1
[INFO] [stdout]     |
[INFO] [stdout] 22  | fn read_input<T: SerialPort + ?Sized>(port: &mut T) {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] ...
[INFO] [stdout] 334 |     read_input(port);
[INFO] [stdout]     |     ---------------- recursive call site
[INFO] [stdout]     |
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]    --> src/main.rs:22:1
[INFO] [stdout]     |
[INFO] [stdout] 22  | fn read_input<T: SerialPort + ?Sized>(port: &mut T) {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] ...
[INFO] [stdout] 334 |     read_input(port);
[INFO] [stdout]     |     ---------------- recursive call site
[INFO] [stdout]     |
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` 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 2.58s
[INFO] running `Command { std: "docker" "inspect" "5801e78a4788aba8ebff789e9a324f1691c74f989bc7d369c466e362a8dd546a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5801e78a4788aba8ebff789e9a324f1691c74f989bc7d369c466e362a8dd546a", kill_on_drop: false }`
[INFO] [stdout] 5801e78a4788aba8ebff789e9a324f1691c74f989bc7d369c466e362a8dd546a
[INFO] checking q231950/navigator64 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fq231950%2Fnavigator64" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/q231950/navigator64 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/q231950/navigator64
[INFO] finished tweaking git repo https://github.com/q231950/navigator64
[INFO] tweaked toml for git repo https://github.com/q231950/navigator64 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/q231950/navigator64 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 5f2f26ad3c96724645b8e1ed53649218c1f1845dfd63e1ed9522deffb80936fe
[INFO] running `Command { std: "docker" "start" "-a" "5f2f26ad3c96724645b8e1ed53649218c1f1845dfd63e1ed9522deffb80936fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f2f26ad3c96724645b8e1ed53649218c1f1845dfd63e1ed9522deffb80936fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f2f26ad3c96724645b8e1ed53649218c1f1845dfd63e1ed9522deffb80936fe", kill_on_drop: false }`
[INFO] [stdout] 5f2f26ad3c96724645b8e1ed53649218c1f1845dfd63e1ed9522deffb80936fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] a6699663a3ad8fef1721550b3ed2bd03e609aecb034ac2b46682a3d71a7a6f89
[INFO] running `Command { std: "docker" "start" "-a" "a6699663a3ad8fef1721550b3ed2bd03e609aecb034ac2b46682a3d71a7a6f89", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]     Checking libudev v0.2.0
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/libudev-0.2.0/src/enumerator.rs:159:13
[INFO] [stdout]     |
[INFO] [stdout] 159 | /             match self.enumerator.context.device_from_syspath(syspath) {
[INFO] [stdout] 160 | |                 Ok(d) => return Some(d),
[INFO] [stdout] 161 | |                 Err(_) => continue
[INFO] [stdout] 162 | |             };
[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 `libudev` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "a6699663a3ad8fef1721550b3ed2bd03e609aecb034ac2b46682a3d71a7a6f89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6699663a3ad8fef1721550b3ed2bd03e609aecb034ac2b46682a3d71a7a6f89", kill_on_drop: false }`
[INFO] [stdout] a6699663a3ad8fef1721550b3ed2bd03e609aecb034ac2b46682a3d71a7a6f89