[INFO] cloning repository https://github.com/tiohsa/rust-canvas
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tiohsa/rust-canvas" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiohsa%2Frust-canvas", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiohsa%2Frust-canvas'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2badfe038a8f67de9273b8e861f1e0a26fe5e167
[INFO] checking tiohsa/rust-canvas against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiohsa%2Frust-canvas" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tiohsa/rust-canvas 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/tiohsa/rust-canvas
[INFO] finished tweaking git repo https://github.com/tiohsa/rust-canvas
[INFO] tweaked toml for git repo https://github.com/tiohsa/rust-canvas written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tiohsa/rust-canvas 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] warning: Found `debug_assertions` in `target.'cfg(...)'.dependencies`. This value is not supported for selecting dependencies and will not work as expected. To learn more visit https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#platform-specific-dependencies
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded memchr v2.2.1
[INFO] [stderr]   Downloaded memory_units v0.4.0
[INFO] [stderr]   Downloaded wasm-bindgen-webidl v0.2.51
[INFO] [stderr]   Downloaded wee_alloc v0.4.5
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.2.50
[INFO] [stderr]   Downloaded failure_derive v0.1.6
[INFO] [stderr]   Downloaded sourcefile v0.1.4
[INFO] [stderr]   Downloaded weedle v0.10.0
[INFO] [stderr]   Downloaded itoa v0.4.4
[INFO] [stderr]   Downloaded exitfailure v0.5.1
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.51
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.3.27
[INFO] [stderr]   Downloaded ryu v1.0.1
[INFO] [stderr]   Downloaded nom v4.2.3
[INFO] [stderr]   Downloaded serde_json v1.0.41
[INFO] [stderr]   Downloaded futures v0.1.29
[INFO] [stderr]   Downloaded syn v1.0.5
[INFO] [stderr]   Downloaded console_error_panic_hook v0.1.6
[INFO] [stderr]   Downloaded backtrace-sys v0.1.31
[INFO] [stderr]   Downloaded web-sys v0.3.28
[INFO] [stderr]   Downloaded libc v0.2.62
[INFO] [stderr]   Downloaded cc v1.0.45
[INFO] [stderr]   Downloaded unicode-segmentation v1.3.0
[INFO] [stderr]   Downloaded bumpalo v2.6.0
[INFO] [stderr]   Downloaded proc-macro2 v0.4.30
[INFO] [stderr]   Downloaded failure v0.1.6
[INFO] [stderr]   Downloaded quote v0.6.13
[INFO] [stderr]   Downloaded wasm-bindgen-test v0.2.50
[INFO] [stderr]   Downloaded synstructure v0.12.1
[INFO] [stderr]   Downloaded quote v1.0.2
[INFO] [stderr]   Downloaded serde v1.0.101
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.51
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.51
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.51
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.51
[INFO] [stderr]   Downloaded js-sys v0.3.28
[INFO] [stderr]   Downloaded backtrace v0.3.38
[INFO] [stderr]   Downloaded proc-macro2 v1.0.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 1f943c9e05aa81a59b88326a0aeedaa167dbb30e592455c90e7c42fb30b87eeb
[INFO] running `Command { std: "docker" "start" "-a" "1f943c9e05aa81a59b88326a0aeedaa167dbb30e592455c90e7c42fb30b87eeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f943c9e05aa81a59b88326a0aeedaa167dbb30e592455c90e7c42fb30b87eeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f943c9e05aa81a59b88326a0aeedaa167dbb30e592455c90e7c42fb30b87eeb", kill_on_drop: false }`
[INFO] [stdout] 1f943c9e05aa81a59b88326a0aeedaa167dbb30e592455c90e7c42fb30b87eeb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] a88c1a37c8f10aa7886f9128040c43609a7354f411258dc4951c9cc7c59d3af9
[INFO] running `Command { std: "docker" "start" "-a" "a88c1a37c8f10aa7886f9128040c43609a7354f411258dc4951c9cc7c59d3af9", kill_on_drop: false }`
[INFO] [stderr] warning: Found `debug_assertions` in `target.'cfg(...)'.dependencies`. This value is not supported for selecting dependencies and will not work as expected. To learn more visit https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#platform-specific-dependencies
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.51
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling bumpalo v2.6.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling wasm-bindgen v0.2.51
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling ryu v1.0.1
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.2.50
[INFO] [stderr]    Compiling weedle v0.10.0
[INFO] [stderr]    Compiling backtrace v0.3.38
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.51
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.51
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]     Checking exitfailure v0.5.1
[INFO] [stderr]    Compiling wasm-bindgen-webidl v0.2.51
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.51
[INFO] [stderr]    Compiling web-sys v0.3.28
[INFO] [stderr]     Checking js-sys v0.3.28
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking wasm-bindgen-futures v0.3.27
[INFO] [stderr]     Checking wasm-bindgen-test v0.2.50
[INFO] [stderr]     Checking rust-webpack-template v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> src/lib.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct Table {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 31 |     x: f64,
[INFO] [stdout]    |     ^
[INFO] [stdout] 32 |     y: f64,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> src/lib.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct Table {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 31 |     x: f64,
[INFO] [stdout]    |     ^
[INFO] [stdout] 32 |     y: f64,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     start();
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let _ = start();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     start();
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let _ = start();
[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 9.41s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v4.2.3, wasm-bindgen v0.2.51
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "a88c1a37c8f10aa7886f9128040c43609a7354f411258dc4951c9cc7c59d3af9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a88c1a37c8f10aa7886f9128040c43609a7354f411258dc4951c9cc7c59d3af9", kill_on_drop: false }`
[INFO] [stdout] a88c1a37c8f10aa7886f9128040c43609a7354f411258dc4951c9cc7c59d3af9
[INFO] checking tiohsa/rust-canvas against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiohsa%2Frust-canvas" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tiohsa/rust-canvas 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/tiohsa/rust-canvas
[INFO] finished tweaking git repo https://github.com/tiohsa/rust-canvas
[INFO] tweaked toml for git repo https://github.com/tiohsa/rust-canvas written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/tiohsa/rust-canvas 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] [stderr] warning: Found `debug_assertions` in `target.'cfg(...)'.dependencies`. This value is not supported for selecting dependencies and will not work as expected. To learn more visit https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#platform-specific-dependencies
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] f903bd696d4a11451b4fa35d0750eb51db18b5f5fddfb38d5babc9e9692c70af
[INFO] running `Command { std: "docker" "start" "-a" "f903bd696d4a11451b4fa35d0750eb51db18b5f5fddfb38d5babc9e9692c70af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f903bd696d4a11451b4fa35d0750eb51db18b5f5fddfb38d5babc9e9692c70af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f903bd696d4a11451b4fa35d0750eb51db18b5f5fddfb38d5babc9e9692c70af", kill_on_drop: false }`
[INFO] [stdout] f903bd696d4a11451b4fa35d0750eb51db18b5f5fddfb38d5babc9e9692c70af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 989eaad9aa24f12582687f709d572dd7b03c56661f75ce23b1fc344b0768e524
[INFO] running `Command { std: "docker" "start" "-a" "989eaad9aa24f12582687f709d572dd7b03c56661f75ce23b1fc344b0768e524", kill_on_drop: false }`
[INFO] [stderr] warning: Found `debug_assertions` in `target.'cfg(...)'.dependencies`. This value is not supported for selecting dependencies and will not work as expected. To learn more visit https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#platform-specific-dependencies
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.51
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling bumpalo v2.6.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling wasm-bindgen v0.2.51
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling ryu v1.0.1
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bumpalo-2.6.0/src/collections/str/lossy.rs:78:45
[INFO] [stdout]    |
[INFO] [stdout] 78 |                   macro_rules! error { () => ({
[INFO] [stdout]    |  _____________________________________________^
[INFO] [stdout] 79 | |                     unsafe {
[INFO] [stdout] 80 | |                         let r = Utf8LossyChunk {
[INFO] [stdout] 81 | |                             valid: str::from_utf8_unchecked(&self.source[0..i_]),
[INFO] [stdout] ...  |
[INFO] [stdout] 86 | |                     }
[INFO] [stdout] 87 | |                 })}
[INFO] [stdout]    | |_________________^ cannot infer type
[INFO] [stdout] ...
[INFO] [stdout] 92 |                               error!();
[INFO] [stdout]    |                               -------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `error` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]     Checking scoped-tls v1.0.0
[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 `bumpalo` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "989eaad9aa24f12582687f709d572dd7b03c56661f75ce23b1fc344b0768e524", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "989eaad9aa24f12582687f709d572dd7b03c56661f75ce23b1fc344b0768e524", kill_on_drop: false }`
[INFO] [stdout] 989eaad9aa24f12582687f709d572dd7b03c56661f75ce23b1fc344b0768e524