Dec 11 21:04:45.677 INFO checking cemozerr/Rust-Cash-Register against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 21:04:45.677 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-7/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-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 11 21:04:46.318 INFO [stdout] 7642d99285c7526999c7564a2f614ac1de35ff586463fd95a8e356b4fb1bca70
Dec 11 21:04:46.324 INFO running `"docker" "start" "-a" "7642d99285c7526999c7564a2f614ac1de35ff586463fd95a8e356b4fb1bca70"`
Dec 11 21:04:48.056 INFO [stderr] usermod: no changes
Dec 11 21:04:48.158 INFO [stderr]    Compiling serde v1.0.74
Dec 11 21:04:48.158 INFO [stderr]    Compiling ryu v0.2.5
Dec 11 21:05:00.107 INFO [stderr]     Checking serde_json v1.0.26
Dec 11 21:05:02.160 INFO [stderr]     Checking cash_register v0.1.0 (/source)
Dec 11 21:05:02.632 INFO [stderr] warning: unused import: `Read`
Dec 11 21:05:02.632 INFO [stderr]  --> src/main.rs:5:21
Dec 11 21:05:02.632 INFO [stderr]   |
Dec 11 21:05:02.632 INFO [stderr] 5 | use std::io::{self, Read};
Dec 11 21:05:02.632 INFO [stderr]   |                     ^^^^
Dec 11 21:05:02.632 INFO [stderr]   |
Dec 11 21:05:02.632 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 21:05:02.632 INFO [stderr] 
Dec 11 21:05:02.856 INFO [stderr] warning: variable does not need to be mutable
Dec 11 21:05:02.856 INFO [stderr]   --> src/main.rs:80:13
Dec 11 21:05:02.856 INFO [stderr]    |
Dec 11 21:05:02.856 INFO [stderr] 80 |         let mut new_receipt = Receipt{
Dec 11 21:05:02.856 INFO [stderr]    |             ----^^^^^^^^^^^
Dec 11 21:05:02.856 INFO [stderr]    |             |
Dec 11 21:05:02.856 INFO [stderr]    |             help: remove this `mut`
Dec 11 21:05:02.856 INFO [stderr]    |
Dec 11 21:05:02.856 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 21:05:02.856 INFO [stderr] 
Dec 11 21:05:02.872 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:05:02.872 INFO [stderr]   --> src/main.rs:28:9
Dec 11 21:05:02.872 INFO [stderr]    |
Dec 11 21:05:02.872 INFO [stderr] 28 |         io::stdin().read_line(&mut buffer);
Dec 11 21:05:02.872 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:05:02.872 INFO [stderr]    |
Dec 11 21:05:02.872 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 21:05:02.872 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:05:02.872 INFO [stderr] 
Dec 11 21:05:02.904 INFO [stderr] warning: unused import: `Read`
Dec 11 21:05:02.904 INFO [stderr]  --> src/main.rs:5:21
Dec 11 21:05:02.904 INFO [stderr]   |
Dec 11 21:05:02.904 INFO [stderr] 5 | use std::io::{self, Read};
Dec 11 21:05:02.904 INFO [stderr]   |                     ^^^^
Dec 11 21:05:02.904 INFO [stderr]   |
Dec 11 21:05:02.904 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 21:05:02.904 INFO [stderr] 
Dec 11 21:05:02.965 INFO [stderr] warning: variable does not need to be mutable
Dec 11 21:05:02.965 INFO [stderr]   --> src/main.rs:80:13
Dec 11 21:05:02.965 INFO [stderr]    |
Dec 11 21:05:02.965 INFO [stderr] 80 |         let mut new_receipt = Receipt{
Dec 11 21:05:02.966 INFO [stderr]    |             ----^^^^^^^^^^^
Dec 11 21:05:02.966 INFO [stderr]    |             |
Dec 11 21:05:02.966 INFO [stderr]    |             help: remove this `mut`
Dec 11 21:05:02.966 INFO [stderr]    |
Dec 11 21:05:02.966 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 21:05:02.966 INFO [stderr] 
Dec 11 21:05:02.969 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:05:02.969 INFO [stderr]   --> src/main.rs:28:9
Dec 11 21:05:02.969 INFO [stderr]    |
Dec 11 21:05:02.970 INFO [stderr] 28 |         io::stdin().read_line(&mut buffer);
Dec 11 21:05:02.970 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:05:02.970 INFO [stderr]    |
Dec 11 21:05:02.970 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 21:05:02.970 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:05:02.970 INFO [stderr] 
Dec 11 21:05:03.010 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.92s
Dec 11 21:05:03.014 INFO [stderr] su: No module specific data is present
Dec 11 21:05:03.618 INFO running `"docker" "inspect" "7642d99285c7526999c7564a2f614ac1de35ff586463fd95a8e356b4fb1bca70"`
Dec 11 21:05:03.789 INFO running `"docker" "rm" "-f" "7642d99285c7526999c7564a2f614ac1de35ff586463fd95a8e356b4fb1bca70"`
Dec 11 21:05:04.036 INFO [stdout] 7642d99285c7526999c7564a2f614ac1de35ff586463fd95a8e356b4fb1bca70