Dec 13 13:57:26.389 INFO testing kirjavascript/duplex against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 13 13:57:26.390 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-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 13 13:57:26.732 INFO [stdout] f018f62717f5adff0c14f08ccb123c1848636f8c881fcff4ffded5e539c8deff
Dec 13 13:57:26.734 INFO running `"docker" "start" "-a" "f018f62717f5adff0c14f08ccb123c1848636f8c881fcff4ffded5e539c8deff"`
Dec 13 13:57:28.682 INFO [stderr] usermod: no changes
Dec 13 13:57:28.850 INFO [stderr]    Compiling memchr v2.1.1
Dec 13 13:57:28.850 INFO [stderr]    Compiling stdweb-internal-macros v0.2.2
Dec 13 13:57:28.850 INFO [stderr]    Compiling stdweb-derive v0.5.1
Dec 13 13:57:31.351 INFO [stderr]    Compiling nom v4.1.1
Dec 13 13:57:39.121 INFO [stderr]    Compiling stdweb v0.4.10
Dec 13 13:58:00.663 INFO [stderr]    Compiling duplex v0.1.0 (/source)
Dec 13 13:58:01.295 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 13 13:58:01.295 INFO [stderr]  --> src/web.rs:6:3
Dec 13 13:58:01.295 INFO [stderr]   |
Dec 13 13:58:01.295 INFO [stderr] 6 | #[js_export]
Dec 13 13:58:01.295 INFO [stderr]   |   ^^^^^^^^^
Dec 13 13:58:01.295 INFO [stderr]   |
Dec 13 13:58:01.295 INFO [stderr]   = help: add #![feature(custom_attribute)] to the crate attributes to enable
Dec 13 13:58:01.295 INFO [stderr] 
Dec 13 13:58:01.299 INFO [stderr] error: aborting due to previous error
Dec 13 13:58:01.299 INFO [stderr] 
Dec 13 13:58:01.300 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 13 13:58:01.309 INFO [stderr] error: Could not compile `duplex`.
Dec 13 13:58:01.309 INFO [stderr] 
Dec 13 13:58:01.309 INFO [stderr] To learn more, run the command again with --verbose.
Dec 13 13:58:01.311 INFO [stderr] su: No module specific data is present
Dec 13 13:58:01.603 INFO running `"docker" "inspect" "f018f62717f5adff0c14f08ccb123c1848636f8c881fcff4ffded5e539c8deff"`
Dec 13 13:58:01.788 INFO running `"docker" "rm" "-f" "f018f62717f5adff0c14f08ccb123c1848636f8c881fcff4ffded5e539c8deff"`
Dec 13 13:58:01.961 INFO [stdout] f018f62717f5adff0c14f08ccb123c1848636f8c881fcff4ffded5e539c8deff