[INFO] updating cached repository https://github.com/nekokuro0xf/workerpool
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ab5f095836f1c52147f6192e65831325f54272c5
[INFO] checking nekokuro0xf/workerpool against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnekokuro0xf%2Fworkerpool" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nekokuro0xf/workerpool on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[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 work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/nekokuro0xf/workerpool already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 14b02f7f2e57516e2934325ad7da0ddfbbaa7cb578fb22902f0e5ec79140c105
[INFO] running `"docker" "start" "-a" "14b02f7f2e57516e2934325ad7da0ddfbbaa7cb578fb22902f0e5ec79140c105"`
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.44
[INFO] [stderr]    Compiling wasm-bindgen v0.2.44
[INFO] [stderr]    Compiling backtrace v0.3.17
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling stdweb v0.4.17
[INFO] [stderr]    Compiling env_logger v0.6.1
[INFO] [stderr]    Compiling stdweb-derive v0.5.1
[INFO] [stderr]    Compiling stdweb-internal-macros v0.2.7
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.44
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.44
[INFO] [stderr]    Compiling wasm-bindgen-webidl v0.2.44
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.44
[INFO] [stderr]    Compiling web-sys v0.3.21
[INFO] [stderr]     Checking js-sys v0.3.21
[INFO] [stderr]     Checking rust_wasm_workerpool v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
[INFO] [stderr]   --> src/main.rs:27:24
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let mut  worker  = Worker::new("./worker.js")?;
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stderr]    = note: required by `std::ops::Try::from_error`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `rust_wasm_workerpool`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
[INFO] [stderr]   --> src/main.rs:27:24
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let mut  worker  = Worker::new("./worker.js")?;
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stderr]    = note: required by `std::ops::Try::from_error`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `rust_wasm_workerpool`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "14b02f7f2e57516e2934325ad7da0ddfbbaa7cb578fb22902f0e5ec79140c105"`
[INFO] running `"docker" "rm" "-f" "14b02f7f2e57516e2934325ad7da0ddfbbaa7cb578fb22902f0e5ec79140c105"`
[INFO] [stdout] 14b02f7f2e57516e2934325ad7da0ddfbbaa7cb578fb22902f0e5ec79140c105