Dec 02 22:54:08.727 INFO testing percy-webapis-0.0.2 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 22:54:08.727 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 22:54:09.039 INFO [stdout] 201f964e7e29c3e9c0ce5205a827243f4758e7ef9850af5db1fa0282b032b9e9
Dec 02 22:54:09.039 INFO running `"docker" "start" "-a" "201f964e7e29c3e9c0ce5205a827243f4758e7ef9850af5db1fa0282b032b9e9"`
Dec 02 22:54:09.532 INFO [stderr] usermod: no changes
Dec 02 22:54:09.589 INFO [stderr]    Compiling syn v0.15.22
Dec 02 22:54:22.974 INFO [stderr]    Compiling wasm-bindgen-backend v0.2.28
Dec 02 22:54:32.639 INFO [stderr]    Compiling wasm-bindgen-macro-support v0.2.28
Dec 02 22:54:39.046 INFO [stderr]    Compiling wasm-bindgen-macro v0.2.28
Dec 02 22:54:43.828 INFO [stderr]    Compiling wasm-bindgen v0.2.28
Dec 02 22:54:45.231 INFO [stderr]    Compiling percy-webapis v0.0.2 (/source)
Dec 02 22:54:46.356 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 22:54:46.357 INFO [stderr]  --> src/lib.rs:1:1
Dec 02 22:54:46.357 INFO [stderr]   |
Dec 02 22:54:46.357 INFO [stderr] 1 | #![feature(use_extern_macros)]
Dec 02 22:54:46.357 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:54:46.358 INFO [stderr] 
Dec 02 22:54:46.358 INFO [stderr] error: aborting due to previous error
Dec 02 22:54:46.358 INFO [stderr] 
Dec 02 22:54:46.358 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 22:54:46.366 INFO [stderr] error: Could not compile `percy-webapis`.
Dec 02 22:54:46.366 INFO [stderr] 
Dec 02 22:54:46.366 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 22:54:46.368 INFO [stderr] su: No module specific data is present
Dec 02 22:54:46.992 INFO running `"docker" "inspect" "201f964e7e29c3e9c0ce5205a827243f4758e7ef9850af5db1fa0282b032b9e9"`
Dec 02 22:54:47.189 INFO running `"docker" "rm" "-f" "201f964e7e29c3e9c0ce5205a827243f4758e7ef9850af5db1fa0282b032b9e9"`
Dec 02 22:54:47.547 INFO [stdout] 201f964e7e29c3e9c0ce5205a827243f4758e7ef9850af5db1fa0282b032b9e9