[INFO] updating cached repository lempiy/WebAssemply-Clipping
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lempiy/WebAssemply-Clipping
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lempiy/WebAssemply-Clipping" "work/ex/beta-1.38-1/sources/1.37.0/gh/lempiy/WebAssemply-Clipping"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lempiy/WebAssemply-Clipping'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lempiy/WebAssemply-Clipping" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lempiy/WebAssemply-Clipping"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lempiy/WebAssemply-Clipping'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e8343c0fc9cc35d1c4d9cfeb19f54766f640edfb
[INFO] sha for GitHub repo lempiy/WebAssemply-Clipping: e8343c0fc9cc35d1c4d9cfeb19f54766f640edfb
[INFO] validating manifest of lempiy/WebAssemply-Clipping on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of lempiy/WebAssemply-Clipping on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing lempiy/WebAssemply-Clipping
[INFO] finished frobbing lempiy/WebAssemply-Clipping
[INFO] frobbed toml for lempiy/WebAssemply-Clipping written to work/ex/beta-1.38-1/sources/1.37.0/gh/lempiy/WebAssemply-Clipping/Cargo.toml
[INFO] started frobbing lempiy/WebAssemply-Clipping
[INFO] finished frobbing lempiy/WebAssemply-Clipping
[INFO] frobbed toml for lempiy/WebAssemply-Clipping written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lempiy/WebAssemply-Clipping/Cargo.toml
[INFO] crate lempiy/WebAssemply-Clipping already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing lempiy/WebAssemply-Clipping against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lempiy/WebAssemply-Clipping:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 67bddb42f5a71081a74955a67be7fdf067d7b749eb5d830ce084a28c1df32dbd
[INFO] running `"docker" "start" "-a" "67bddb42f5a71081a74955a67be7fdf067d7b749eb5d830ce084a28c1df32dbd"`
[INFO] [stderr]    Compiling stdweb v0.4.4
[INFO] [stderr]    Compiling serde v1.0.43
[INFO] [stderr]    Compiling dtoa v0.4.2
[INFO] [stderr]    Compiling itoa v0.4.1
[INFO] [stderr]    Compiling futures v0.1.21
[INFO] [stderr]    Compiling discard v1.0.3
[INFO] [stderr]    Compiling poly v0.1.0 (https://github.com/lempiy/Weiler-Atherton-Clipping.git#e7a517b3)
[INFO] [stderr]    Compiling proc-macro2 v0.3.7
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]    Compiling syn v0.13.1
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]    Compiling serde_derive v1.0.43
[INFO] [stderr]    Compiling serde_json v1.0.16
[INFO] [stderr]    Compiling stdweb-derive v0.4.0
[INFO] [stderr]    Compiling wasm_poly v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `stdweb::js_export`
[INFO] [stderr]   --> src/lib.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use stdweb::js_export;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^ no `js_export` in the root
[INFO] [stderr] 
[INFO] [stderr] error: cannot determine resolution for the attribute macro `js_export`
[INFO] [stderr]   --> src/lib.rs:22:3
[INFO] [stderr]    |
[INFO] [stderr] 22 | #[js_export]
[INFO] [stderr]    |   ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `wasm_poly`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "67bddb42f5a71081a74955a67be7fdf067d7b749eb5d830ce084a28c1df32dbd"`
[INFO] running `"docker" "rm" "-f" "67bddb42f5a71081a74955a67be7fdf067d7b749eb5d830ce084a28c1df32dbd"`
[INFO] [stdout] 67bddb42f5a71081a74955a67be7fdf067d7b749eb5d830ce084a28c1df32dbd