Oct 31 23:56:32.059 INFO testing quelledanielle/webcam against 1.30.0 for beta-1.31-1
Oct 31 23:56:32.059 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-1/worker-5/1.30.0:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-1/1.30.0:/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 +1.30.0 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"`
Oct 31 23:56:32.497 INFO blam! 32ed66f358a44b9151df7498eaf2643b406798a185cbfc65192b2836f462b15c
Oct 31 23:56:32.499 INFO running `"docker" "start" "-a" "32ed66f358a44b9151df7498eaf2643b406798a185cbfc65192b2836f462b15c"`
Oct 31 23:56:33.834 INFO kablam! usermod: no changes
Oct 31 23:56:33.903 INFO kablam!    Compiling webcam v0.1.0 (/source)
Oct 31 23:56:34.149 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Oct 31 23:56:34.150 INFO kablam!  --> src/lib.rs:1:1
Oct 31 23:56:34.150 INFO kablam!   |
Oct 31 23:56:34.150 INFO kablam! 1 | #![feature(iterator_step_by)]
Oct 31 23:56:34.150 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 23:56:34.150 INFO kablam! 
Oct 31 23:56:34.151 INFO kablam! error: aborting due to previous error
Oct 31 23:56:34.151 INFO kablam! 
Oct 31 23:56:34.151 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Oct 31 23:56:34.154 INFO kablam! error: Could not compile `webcam`.
Oct 31 23:56:34.154 INFO kablam! 
Oct 31 23:56:34.155 INFO kablam! To learn more, run the command again with --verbose.
Oct 31 23:56:34.159 INFO kablam! su: No module specific data is present
Oct 31 23:56:35.303 INFO running `"docker" "rm" "-f" "32ed66f358a44b9151df7498eaf2643b406798a185cbfc65192b2836f462b15c"`
Oct 31 23:56:35.499 INFO blam! 32ed66f358a44b9151df7498eaf2643b406798a185cbfc65192b2836f462b15c
