Dec 14 05:20:17.429 INFO testing ThePerkinrex/PercOSv2 against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 14 05:20:17.429 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 14 05:20:18.295 INFO [stdout] 4e206e4f08040c1894c77f2e1547363d17864603072e170e8af6e2df79077f8a
Dec 14 05:20:18.303 INFO running `"docker" "start" "-a" "4e206e4f08040c1894c77f2e1547363d17864603072e170e8af6e2df79077f8a"`
Dec 14 05:20:19.952 INFO [stderr] usermod: no changes
Dec 14 05:20:20.075 INFO [stderr]    Compiling bitflags v0.4.0
Dec 14 05:20:20.075 INFO [stderr]    Compiling rlibc v1.0.0
Dec 14 05:20:20.083 INFO [stderr]    Compiling spin v0.4.9
Dec 14 05:20:20.087 INFO [stderr]    Compiling volatile v0.2.4
Dec 14 05:20:20.419 INFO [stderr]    Compiling multiboot2 v0.1.0
Dec 14 05:20:20.913 INFO [stderr]    Compiling percos v2.0.0 (/source)
Dec 14 05:20:20.967 INFO [stderr] error[E0557]: feature has been removed
Dec 14 05:20:20.967 INFO [stderr]  --> src/lib.rs:3:12
Dec 14 05:20:20.967 INFO [stderr]   |
Dec 14 05:20:20.967 INFO [stderr] 3 | #![feature(panic_implementation)]
Dec 14 05:20:20.967 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^
Dec 14 05:20:20.967 INFO [stderr]   |
Dec 14 05:20:20.967 INFO [stderr] note: subsumed by `#[panic_handler]`
Dec 14 05:20:20.967 INFO [stderr]  --> src/lib.rs:3:12
Dec 14 05:20:20.967 INFO [stderr]   |
Dec 14 05:20:20.967 INFO [stderr] 3 | #![feature(panic_implementation)]
Dec 14 05:20:20.967 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^
Dec 14 05:20:20.967 INFO [stderr] 
Dec 14 05:20:21.067 INFO [stderr] warning: unused import: `core::fmt::Debug`
Dec 14 05:20:21.067 INFO [stderr]  --> src/shell/mod.rs:2:5
Dec 14 05:20:21.067 INFO [stderr]   |
Dec 14 05:20:21.067 INFO [stderr] 2 | use core::fmt::Debug;
Dec 14 05:20:21.067 INFO [stderr]   |     ^^^^^^^^^^^^^^^^
Dec 14 05:20:21.067 INFO [stderr]   |
Dec 14 05:20:21.067 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 14 05:20:21.067 INFO [stderr] 
Dec 14 05:20:21.067 INFO [stderr] warning: unused import: `memory::FrameAllocator`
Dec 14 05:20:21.067 INFO [stderr]   --> src/lib.rs:30:5
Dec 14 05:20:21.067 INFO [stderr]    |
Dec 14 05:20:21.067 INFO [stderr] 30 | use memory::FrameAllocator;
Dec 14 05:20:21.067 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 14 05:20:21.067 INFO [stderr] 
Dec 14 05:20:21.190 INFO [stderr] error: aborting due to previous error
Dec 14 05:20:21.190 INFO [stderr] 
Dec 14 05:20:21.190 INFO [stderr] For more information about this error, try `rustc --explain E0557`.
Dec 14 05:20:21.195 INFO [stderr] error: Could not compile `percos`.
Dec 14 05:20:21.195 INFO [stderr] 
Dec 14 05:20:21.195 INFO [stderr] To learn more, run the command again with --verbose.
Dec 14 05:20:21.196 INFO [stderr] su: No module specific data is present
Dec 14 05:20:22.041 INFO running `"docker" "inspect" "4e206e4f08040c1894c77f2e1547363d17864603072e170e8af6e2df79077f8a"`
Dec 14 05:20:22.106 INFO running `"docker" "rm" "-f" "4e206e4f08040c1894c77f2e1547363d17864603072e170e8af6e2df79077f8a"`
Dec 14 05:20:22.187 INFO [stdout] 4e206e4f08040c1894c77f2e1547363d17864603072e170e8af6e2df79077f8a