[INFO] updating cached repository Tarnadas/wasm-bindgen-test
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Tarnadas/wasm-bindgen-test
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Tarnadas/wasm-bindgen-test" "work/ex/beta-1.38-1/sources/1.37.0/gh/Tarnadas/wasm-bindgen-test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Tarnadas/wasm-bindgen-test'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Tarnadas/wasm-bindgen-test" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Tarnadas/wasm-bindgen-test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Tarnadas/wasm-bindgen-test'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 444880b737e5e100c264cff5d7ce24bf66282e81
[INFO] sha for GitHub repo Tarnadas/wasm-bindgen-test: 444880b737e5e100c264cff5d7ce24bf66282e81
[INFO] validating manifest of Tarnadas/wasm-bindgen-test 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 Tarnadas/wasm-bindgen-test 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 Tarnadas/wasm-bindgen-test
[INFO] finished frobbing Tarnadas/wasm-bindgen-test
[INFO] frobbed toml for Tarnadas/wasm-bindgen-test written to work/ex/beta-1.38-1/sources/1.37.0/gh/Tarnadas/wasm-bindgen-test/Cargo.toml
[INFO] started frobbing Tarnadas/wasm-bindgen-test
[INFO] finished frobbing Tarnadas/wasm-bindgen-test
[INFO] frobbed toml for Tarnadas/wasm-bindgen-test written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Tarnadas/wasm-bindgen-test/Cargo.toml
[INFO] crate Tarnadas/wasm-bindgen-test 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] testing Tarnadas/wasm-bindgen-test against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Tarnadas/wasm-bindgen-test:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 4aa62d17d9d8a365c6fbc6af60da9d8d611d0b004ba2f8537ead4697f8eea128
[INFO] running `"docker" "start" "-a" "4aa62d17d9d8a365c6fbc6af60da9d8d611d0b004ba2f8537ead4697f8eea128"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.15
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.19
[INFO] [stderr]    Compiling serde_json v1.0.26
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling serde_derive v1.0.75
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.19
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.19
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.19
[INFO] [stderr]    Compiling wasm-bindgen v0.2.19
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/wasm-bindgen-0.2.19/src/lib.rs:10:34
[INFO] [stderr]    |
[INFO] [stderr] 10 | #![cfg_attr(feature = "nightly", feature(unsize))]
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `wasm-bindgen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4aa62d17d9d8a365c6fbc6af60da9d8d611d0b004ba2f8537ead4697f8eea128"`
[INFO] running `"docker" "rm" "-f" "4aa62d17d9d8a365c6fbc6af60da9d8d611d0b004ba2f8537ead4697f8eea128"`
[INFO] [stdout] 4aa62d17d9d8a365c6fbc6af60da9d8d611d0b004ba2f8537ead4697f8eea128