Dec 02 21:13:19.440 INFO testing ramp-0.5.1 against 1.30.1 for beta-1.31-5
Dec 02 21:13:19.440 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-6/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/beta-1.31-5/1.30.1:/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 +1.30.1 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 21:13:19.630 INFO [stdout] d9e10723d717a97e6b64a256177ee75d46c056948362bd96e6bc8545cd8906f4
Dec 02 21:13:19.632 INFO running `"docker" "start" "-a" "d9e10723d717a97e6b64a256177ee75d46c056948362bd96e6bc8545cd8906f4"`
Dec 02 21:13:20.274 INFO [stderr] usermod: no changes
Dec 02 21:13:20.442 INFO [stderr]    Compiling rustc-cfg v0.2.0
Dec 02 21:13:20.443 INFO [stderr]    Compiling ieee754 v0.2.2
Dec 02 21:13:20.463 INFO [stderr]    Compiling num-bigint v0.1.44
Dec 02 21:13:24.939 INFO [stderr]    Compiling ramp v0.5.1 (/source)
Dec 02 21:13:28.487 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 21:13:28.487 INFO [stderr]   --> src/lib.rs:18:1
Dec 02 21:13:28.487 INFO [stderr]    |
Dec 02 21:13:28.487 INFO [stderr] 18 | #![feature(core_intrinsics, asm, allocator_api)]
Dec 02 21:13:28.487 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 21:13:28.487 INFO [stderr] 
Dec 02 21:13:28.487 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 21:13:28.487 INFO [stderr]   --> src/lib.rs:19:1
Dec 02 21:13:28.487 INFO [stderr]    |
Dec 02 21:13:28.487 INFO [stderr] 19 | #![feature(step_trait, ptr_internals, alloc, raw_vec_internals)]
Dec 02 21:13:28.487 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 21:13:28.487 INFO [stderr] 
Dec 02 21:13:28.495 INFO [stderr] error: aborting due to 2 previous errors
Dec 02 21:13:28.496 INFO [stderr] 
Dec 02 21:13:28.496 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 21:13:28.505 INFO [stderr] error: Could not compile `ramp`.
Dec 02 21:13:28.505 INFO [stderr] 
Dec 02 21:13:28.505 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 21:13:28.511 INFO [stderr] su: No module specific data is present
Dec 02 21:13:29.102 INFO running `"docker" "inspect" "d9e10723d717a97e6b64a256177ee75d46c056948362bd96e6bc8545cd8906f4"`
Dec 02 21:13:29.244 INFO running `"docker" "rm" "-f" "d9e10723d717a97e6b64a256177ee75d46c056948362bd96e6bc8545cd8906f4"`
Dec 02 21:13:29.424 INFO [stdout] d9e10723d717a97e6b64a256177ee75d46c056948362bd96e6bc8545cd8906f4