Dec 11 15:25:38.184 INFO checking kirjavascript/duplex against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 15:25:38.184 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 15:25:38.530 INFO [stdout] ce46efa704d7cbd21eb2a59f9eb111ed991bbcfb1182df89f44c49f7d2a28e6b
Dec 11 15:25:38.532 INFO running `"docker" "start" "-a" "ce46efa704d7cbd21eb2a59f9eb111ed991bbcfb1182df89f44c49f7d2a28e6b"`
Dec 11 15:25:39.420 INFO [stderr] usermod: no changes
Dec 11 15:25:39.514 INFO [stderr]    Compiling stdweb-internal-runtime v0.1.2
Dec 11 15:25:39.514 INFO [stderr]    Compiling base-x v0.2.3
Dec 11 15:25:39.518 INFO [stderr]    Compiling stdweb-internal-macros v0.2.2
Dec 11 15:25:39.519 INFO [stderr]    Compiling stdweb v0.4.10
Dec 11 15:25:39.519 INFO [stderr]    Compiling stdweb-derive v0.5.1
Dec 11 15:26:03.995 INFO [stderr]     Checking duplex v0.1.0 (/source)
Dec 11 15:26:04.796 INFO [stderr] error[E0658]: The attribute `js_export` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Dec 11 15:26:04.796 INFO [stderr]  --> src/web.rs:6:3
Dec 11 15:26:04.796 INFO [stderr]   |
Dec 11 15:26:04.796 INFO [stderr] 6 | #[js_export]
Dec 11 15:26:04.796 INFO [stderr]   |   ^^^^^^^^^
Dec 11 15:26:04.796 INFO [stderr]   |
Dec 11 15:26:04.796 INFO [stderr]   = help: add #![feature(custom_attribute)] to the crate attributes to enable
Dec 11 15:26:04.796 INFO [stderr] 
Dec 11 15:26:04.800 INFO [stderr] error: aborting due to previous error
Dec 11 15:26:04.800 INFO [stderr] 
Dec 11 15:26:04.800 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 11 15:26:04.804 INFO [stderr] error: Could not compile `duplex`.
Dec 11 15:26:04.804 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 11 15:26:04.824 INFO [stderr] error[E0658]: The attribute `js_export` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Dec 11 15:26:04.824 INFO [stderr]  --> src/web.rs:6:3
Dec 11 15:26:04.824 INFO [stderr]   |
Dec 11 15:26:04.824 INFO [stderr] 6 | #[js_export]
Dec 11 15:26:04.824 INFO [stderr]   |   ^^^^^^^^^
Dec 11 15:26:04.824 INFO [stderr]   |
Dec 11 15:26:04.824 INFO [stderr]   = help: add #![feature(custom_attribute)] to the crate attributes to enable
Dec 11 15:26:04.824 INFO [stderr] 
Dec 11 15:26:04.829 INFO [stderr] error: aborting due to previous error
Dec 11 15:26:04.829 INFO [stderr] 
Dec 11 15:26:04.829 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 11 15:26:04.836 INFO [stderr] error: Could not compile `duplex`.
Dec 11 15:26:04.836 INFO [stderr] 
Dec 11 15:26:04.836 INFO [stderr] To learn more, run the command again with --verbose.
Dec 11 15:26:04.840 INFO [stderr] su: No module specific data is present
Dec 11 15:26:05.532 INFO running `"docker" "inspect" "ce46efa704d7cbd21eb2a59f9eb111ed991bbcfb1182df89f44c49f7d2a28e6b"`
Dec 11 15:26:05.844 INFO running `"docker" "rm" "-f" "ce46efa704d7cbd21eb2a59f9eb111ed991bbcfb1182df89f44c49f7d2a28e6b"`
Dec 11 15:26:06.160 INFO [stdout] ce46efa704d7cbd21eb2a59f9eb111ed991bbcfb1182df89f44c49f7d2a28e6b