Dec 19 14:17:32.912 INFO checking kirjavascript/duplex against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 14:17:32.913 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/kirjavascript/duplex:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 14:17:33.440 INFO [stdout] 9a7de4da6c7cf373fdd1a2af98a94fd1c85f80cf18d40217b7d6d1a3a29555f0
Dec 19 14:17:33.442 INFO running `"docker" "start" "-a" "9a7de4da6c7cf373fdd1a2af98a94fd1c85f80cf18d40217b7d6d1a3a29555f0"`
Dec 19 14:17:35.173 INFO [stderr]    Compiling stdweb-internal-runtime v0.1.2
Dec 19 14:17:35.173 INFO [stderr]    Compiling base-x v0.2.3
Dec 19 14:17:35.173 INFO [stderr]     Checking discard v1.0.4
Dec 19 14:17:35.181 INFO [stderr]    Compiling stdweb-internal-macros v0.2.2
Dec 19 14:17:35.181 INFO [stderr]    Compiling stdweb v0.4.10
Dec 19 14:17:35.182 INFO [stderr]     Checking memchr v2.1.1
Dec 19 14:17:35.183 INFO [stderr]    Compiling serde_derive v1.0.80
Dec 19 14:17:36.968 INFO [stderr]     Checking nom v4.1.1
Dec 19 14:17:47.401 INFO [stderr]    Compiling stdweb-derive v0.5.1
Dec 19 14:18:08.377 INFO [stderr]     Checking duplex v0.1.0 (/opt/crater/workdir)
Dec 19 14:18:08.775 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 19 14:18:08.775 INFO [stderr]  --> src/web.rs:6:3
Dec 19 14:18:08.775 INFO [stderr]   |
Dec 19 14:18:08.776 INFO [stderr] 6 | #[js_export]
Dec 19 14:18:08.776 INFO [stderr]   |   ^^^^^^^^^
Dec 19 14:18:08.776 INFO [stderr]   |
Dec 19 14:18:08.776 INFO [stderr]   = help: add #![feature(custom_attribute)] to the crate attributes to enable
Dec 19 14:18:08.777 INFO [stderr] 
Dec 19 14:18:08.777 INFO [stderr] error: aborting due to previous error
Dec 19 14:18:08.777 INFO [stderr] 
Dec 19 14:18:08.777 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 19 14:18:08.778 INFO [stderr] error: Could not compile `duplex`.
Dec 19 14:18:08.779 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 19 14:18:08.843 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 19 14:18:08.843 INFO [stderr]  --> src/web.rs:6:3
Dec 19 14:18:08.843 INFO [stderr]   |
Dec 19 14:18:08.844 INFO [stderr] 6 | #[js_export]
Dec 19 14:18:08.844 INFO [stderr]   |   ^^^^^^^^^
Dec 19 14:18:08.844 INFO [stderr]   |
Dec 19 14:18:08.845 INFO [stderr]   = help: add #![feature(custom_attribute)] to the crate attributes to enable
Dec 19 14:18:08.845 INFO [stderr] 
Dec 19 14:18:08.847 INFO [stderr] error: aborting due to previous error
Dec 19 14:18:08.847 INFO [stderr] 
Dec 19 14:18:08.848 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 19 14:18:08.857 INFO [stderr] error: Could not compile `duplex`.
Dec 19 14:18:08.858 INFO [stderr] 
Dec 19 14:18:08.858 INFO [stderr] To learn more, run the command again with --verbose.
Dec 19 14:18:09.999 INFO running `"docker" "inspect" "9a7de4da6c7cf373fdd1a2af98a94fd1c85f80cf18d40217b7d6d1a3a29555f0"`
Dec 19 14:18:10.318 INFO running `"docker" "rm" "-f" "9a7de4da6c7cf373fdd1a2af98a94fd1c85f80cf18d40217b7d6d1a3a29555f0"`
Dec 19 14:18:10.692 INFO [stdout] 9a7de4da6c7cf373fdd1a2af98a94fd1c85f80cf18d40217b7d6d1a3a29555f0