Dec 14 10:08:18.900 INFO testing GHvW/frothy-rs against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 14 10:08:18.900 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-1/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 10:08:19.315 INFO [stdout] 6ccdd924b99ac6e3d747484e9879c31cbb6d9b633334783d7707ab94c865c2db
Dec 14 10:08:19.317 INFO running `"docker" "start" "-a" "6ccdd924b99ac6e3d747484e9879c31cbb6d9b633334783d7707ab94c865c2db"`
Dec 14 10:08:20.520 INFO [stderr] usermod: no changes
Dec 14 10:08:20.559 INFO [stderr]    Compiling frothy_rs v0.1.0 (/source)
Dec 14 10:08:21.046 INFO [stderr] warning: unused import: `Read`
Dec 14 10:08:21.047 INFO [stderr]  --> src/main.rs:3:22
Dec 14 10:08:21.047 INFO [stderr]   |
Dec 14 10:08:21.047 INFO [stderr] 3 | use std::io::{Write, Read};
Dec 14 10:08:21.047 INFO [stderr]   |                      ^^^^
Dec 14 10:08:21.047 INFO [stderr]   |
Dec 14 10:08:21.047 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 14 10:08:21.047 INFO [stderr] 
Dec 14 10:08:21.083 INFO [stderr] error[E0277]: `impl Stack<String>` doesn't implement `std::fmt::Debug`
Dec 14 10:08:21.083 INFO [stderr]   --> src/main.rs:72:37
Dec 14 10:08:21.083 INFO [stderr]    |
Dec 14 10:08:21.083 INFO [stderr] 72 |     println!("current stack: {:?}", *stack);
Dec 14 10:08:21.083 INFO [stderr]    |                                     ^^^^^^ `impl Stack<String>` cannot be formatted using `{:?}` because it doesn't implement `std::fmt::Debug`
Dec 14 10:08:21.083 INFO [stderr]    |
Dec 14 10:08:21.083 INFO [stderr]    = help: the trait `std::fmt::Debug` is not implemented for `impl Stack<String>`
Dec 14 10:08:21.083 INFO [stderr]    = help: consider adding a `where impl Stack<String>: std::fmt::Debug` bound
Dec 14 10:08:21.083 INFO [stderr]    = note: required by `std::fmt::Debug::fmt`
Dec 14 10:08:21.083 INFO [stderr] 
Dec 14 10:08:21.088 INFO [stderr] error: aborting due to previous error
Dec 14 10:08:21.088 INFO [stderr] 
Dec 14 10:08:21.088 INFO [stderr] For more information about this error, try `rustc --explain E0277`.
Dec 14 10:08:21.095 INFO [stderr] error: Could not compile `frothy_rs`.
Dec 14 10:08:21.095 INFO [stderr] 
Dec 14 10:08:21.095 INFO [stderr] To learn more, run the command again with --verbose.
Dec 14 10:08:21.095 INFO [stderr] su: No module specific data is present
Dec 14 10:08:21.713 INFO running `"docker" "inspect" "6ccdd924b99ac6e3d747484e9879c31cbb6d9b633334783d7707ab94c865c2db"`
Dec 14 10:08:21.967 INFO running `"docker" "rm" "-f" "6ccdd924b99ac6e3d747484e9879c31cbb6d9b633334783d7707ab94c865c2db"`
Dec 14 10:08:22.222 INFO [stdout] 6ccdd924b99ac6e3d747484e9879c31cbb6d9b633334783d7707ab94c865c2db