[INFO] cloning repository https://github.com/nekokuro0xf/workerpool
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nekokuro0xf/workerpool" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnekokuro0xf%2Fworkerpool", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnekokuro0xf%2Fworkerpool'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab5f095836f1c52147f6192e65831325f54272c5
[INFO] checking nekokuro0xf/workerpool against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnekokuro0xf%2Fworkerpool" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nekokuro0xf/workerpool on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nekokuro0xf/workerpool
[INFO] finished tweaking git repo https://github.com/nekokuro0xf/workerpool
[INFO] tweaked toml for git repo https://github.com/nekokuro0xf/workerpool written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/nekokuro0xf/workerpool already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded weedle v0.8.0
[INFO] [stderr]   Downloaded backtrace v0.3.17
[INFO] [stderr]   Downloaded bumpalo v2.4.1
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.44
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.44
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.44
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.44
[INFO] [stderr]   Downloaded wasm-bindgen-webidl v0.2.44
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.44
[INFO] [stderr]   Downloaded js-sys v0.3.21
[INFO] [stderr]   Downloaded web-sys v0.3.21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37dcabe58fc84f8054ad4e3f2a1ff65590d55d6324f1df25a5e1dac7f69952e3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "37dcabe58fc84f8054ad4e3f2a1ff65590d55d6324f1df25a5e1dac7f69952e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37dcabe58fc84f8054ad4e3f2a1ff65590d55d6324f1df25a5e1dac7f69952e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37dcabe58fc84f8054ad4e3f2a1ff65590d55d6324f1df25a5e1dac7f69952e3", kill_on_drop: false }`
[INFO] [stdout] 37dcabe58fc84f8054ad4e3f2a1ff65590d55d6324f1df25a5e1dac7f69952e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 472d149fa64eab6e8ac8ed6c48e507406011b70c8ecf32ce44cc746d76811d60
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "472d149fa64eab6e8ac8ed6c48e507406011b70c8ecf32ce44cc746d76811d60", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.44
[INFO] [stderr]    Compiling bumpalo v2.4.1
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling serde v1.0.91
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling rustc-demangle v0.1.14
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling wasm-bindgen v0.2.44
[INFO] [stderr]    Compiling termcolor v1.0.4
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling stdweb-internal-runtime v0.1.4
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]    Compiling sha1 v0.6.0
[INFO] [stderr]    Compiling base-x v0.2.4
[INFO] [stderr]     Checking discard v1.0.4
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling backtrace v0.3.17
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling humantime v1.2.0
[INFO] [stderr]    Compiling regex-syntax v0.6.6
[INFO] [stderr]    Compiling libc v0.2.54
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling stdweb v0.4.17
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.44
[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling weedle v0.8.0
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.44
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.44
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling stdweb-derive v0.5.1
[INFO] [stderr]    Compiling env_logger v0.6.1
[INFO] [stderr]     Checking js-sys v0.3.21
[INFO] [stderr]    Compiling stdweb-internal-macros v0.2.7
[INFO] [stderr]    Compiling wasm-bindgen-webidl v0.2.44
[INFO] [stderr]    Compiling web-sys v0.3.21
[INFO] [stderr]     Checking rust_wasm_workerpool v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`)
[INFO] [stdout]   --> src/main.rs:27:24
[INFO] [stdout]    |
[INFO] [stdout] 15 | / pub fn main() {
[INFO] [stdout] 16 | |     let message = "Hello, 世界!";
[INFO] [stdout] 17 | |     js! {
[INFO] [stdout] 18 | |         // alert( @{message} );
[INFO] [stdout] ...  |
[INFO] [stdout] 27 | |     let mut  worker  = Worker::new("./worker.js")?;
[INFO] [stdout]    | |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] ...  |
[INFO] [stdout] 33 | |
[INFO] [stdout] 34 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`)
[INFO] [stdout]   --> src/main.rs:27:24
[INFO] [stdout]    |
[INFO] [stdout] 15 | / pub fn main() {
[INFO] [stdout] 16 | |     let message = "Hello, 世界!";
[INFO] [stdout] 17 | |     js! {
[INFO] [stdout] 18 | |         // alert( @{message} );
[INFO] [stdout] ...  |
[INFO] [stdout] 27 | |     let mut  worker  = Worker::new("./worker.js")?;
[INFO] [stdout]    | |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] ...  |
[INFO] [stdout] 33 | |
[INFO] [stdout] 34 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_wasm_workerpool`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "472d149fa64eab6e8ac8ed6c48e507406011b70c8ecf32ce44cc746d76811d60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "472d149fa64eab6e8ac8ed6c48e507406011b70c8ecf32ce44cc746d76811d60", kill_on_drop: false }`
[INFO] [stdout] 472d149fa64eab6e8ac8ed6c48e507406011b70c8ecf32ce44cc746d76811d60