Nov 01 18:49:37.367 INFO testing Osspial/letter-pair against 1.30.0 for beta-1.31-1
Nov 01 18:49:37.367 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-1/worker-1/1.30.0:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/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"`
Nov 01 18:49:37.900 INFO blam! f35ab53e01473f6305462e95e2578f610c9d2efea43f33a13b2d6a1f784e69df
Nov 01 18:49:37.902 INFO running `"docker" "start" "-a" "f35ab53e01473f6305462e95e2578f610c9d2efea43f33a13b2d6a1f784e69df"`
Nov 01 18:49:39.031 INFO kablam! usermod: no changes
Nov 01 18:49:39.066 INFO kablam!    Compiling letter-pair v0.1.0 (/source)
Nov 01 18:49:39.527 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Nov 01 18:49:39.527 INFO kablam!  --> src/main.rs:1:1
Nov 01 18:49:39.527 INFO kablam!   |
Nov 01 18:49:39.527 INFO kablam! 1 | #![feature(nll)]
Nov 01 18:49:39.527 INFO kablam!   | ^^^^^^^^^^^^^^^^
Nov 01 18:49:39.527 INFO kablam! 
Nov 01 18:49:39.529 INFO kablam! error: aborting due to previous error
Nov 01 18:49:39.529 INFO kablam! 
Nov 01 18:49:39.529 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Nov 01 18:49:39.533 INFO kablam! error: Could not compile `letter-pair`.
Nov 01 18:49:39.533 INFO kablam! 
Nov 01 18:49:39.533 INFO kablam! To learn more, run the command again with --verbose.
Nov 01 18:49:39.534 INFO kablam! su: No module specific data is present
Nov 01 18:49:40.031 INFO running `"docker" "rm" "-f" "f35ab53e01473f6305462e95e2578f610c9d2efea43f33a13b2d6a1f784e69df"`
Nov 01 18:49:40.317 INFO blam! f35ab53e01473f6305462e95e2578f610c9d2efea43f33a13b2d6a1f784e69df
