Dec 04 14:11:20.256 INFO checking mfs/box against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 14:11:20.256 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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 04 14:11:20.518 INFO [stdout] be141fcdc6251c8d57204681d1e3f1d4d3c88c5e417c25e538f0829516921caa
Dec 04 14:11:20.520 INFO running `"docker" "start" "-a" "be141fcdc6251c8d57204681d1e3f1d4d3c88c5e417c25e538f0829516921caa"`
Dec 04 14:11:21.118 INFO [stderr] usermod: no changes
Dec 04 14:11:21.170 INFO [stderr]     Checking box v0.1.0 (/source)
Dec 04 14:11:21.543 INFO [stderr] warning: variable does not need to be mutable
Dec 04 14:11:21.543 INFO [stderr]   --> src/bin/assembler.rs:24:9
Dec 04 14:11:21.543 INFO [stderr]    |
Dec 04 14:11:21.543 INFO [stderr] 24 |     let mut reader = BufReader::new(f);
Dec 04 14:11:21.543 INFO [stderr]    |         ----^^^^^^
Dec 04 14:11:21.543 INFO [stderr]    |         |
Dec 04 14:11:21.543 INFO [stderr]    |         help: remove this `mut`
Dec 04 14:11:21.543 INFO [stderr]    |
Dec 04 14:11:21.543 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 14:11:21.543 INFO [stderr] 
Dec 04 14:11:21.543 INFO [stderr] warning: constant item is never used: `INSTRUCTIONS`
Dec 04 14:11:21.543 INFO [stderr]   --> src/bin/assembler.rs:7:1
Dec 04 14:11:21.543 INFO [stderr]    |
Dec 04 14:11:21.543 INFO [stderr] 7  | / const INSTRUCTIONS: &'static [&'static str] = &[
Dec 04 14:11:21.543 INFO [stderr] 8  | |     "nop", "jcn", "fim", "src", "fin", "jin", "jun", "jms", "inc", "isz", "add", "sub", "ld",
Dec 04 14:11:21.543 INFO [stderr] 9  | |     "xch", "bbl", "ldm", "wrm", "wmp", "wrr", "wr0", "wr1", "wr2", "wr3", "sbm", "rdm", "rdr",
Dec 04 14:11:21.543 INFO [stderr] 10 | |     "adm", "rd0", "rd1", "rd2", "rd3", "clb", "iac", "cmc", "cma", "ral", "rar", "tcc", "dac",
Dec 04 14:11:21.543 INFO [stderr] 11 | |     "tcs", "stc", "daa", "kbp", "dcl"
Dec 04 14:11:21.543 INFO [stderr] 12 | | ];
Dec 04 14:11:21.543 INFO [stderr]    | |__^
Dec 04 14:11:21.543 INFO [stderr]    |
Dec 04 14:11:21.543 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 14:11:21.543 INFO [stderr] 
Dec 04 14:11:21.543 INFO [stderr] warning: enum is never used: `Token`
Dec 04 14:11:21.543 INFO [stderr]   --> src/bin/assembler.rs:14:1
Dec 04 14:11:21.543 INFO [stderr]    |
Dec 04 14:11:21.543 INFO [stderr] 14 | enum Token {
Dec 04 14:11:21.543 INFO [stderr]    | ^^^^^^^^^^
Dec 04 14:11:21.543 INFO [stderr] 
Dec 04 14:11:21.635 INFO [stderr] warning: variable does not need to be mutable
Dec 04 14:11:21.635 INFO [stderr]   --> src/bin/assembler.rs:24:9
Dec 04 14:11:21.635 INFO [stderr]    |
Dec 04 14:11:21.635 INFO [stderr] 24 |     let mut reader = BufReader::new(f);
Dec 04 14:11:21.635 INFO [stderr]    |         ----^^^^^^
Dec 04 14:11:21.635 INFO [stderr]    |         |
Dec 04 14:11:21.635 INFO [stderr]    |         help: remove this `mut`
Dec 04 14:11:21.635 INFO [stderr]    |
Dec 04 14:11:21.635 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 14:11:21.635 INFO [stderr] 
Dec 04 14:11:21.635 INFO [stderr] warning: constant item is never used: `INSTRUCTIONS`
Dec 04 14:11:21.635 INFO [stderr]   --> src/bin/assembler.rs:7:1
Dec 04 14:11:21.635 INFO [stderr]    |
Dec 04 14:11:21.635 INFO [stderr] 7  | / const INSTRUCTIONS: &'static [&'static str] = &[
Dec 04 14:11:21.635 INFO [stderr] 8  | |     "nop", "jcn", "fim", "src", "fin", "jin", "jun", "jms", "inc", "isz", "add", "sub", "ld",
Dec 04 14:11:21.635 INFO [stderr] 9  | |     "xch", "bbl", "ldm", "wrm", "wmp", "wrr", "wr0", "wr1", "wr2", "wr3", "sbm", "rdm", "rdr",
Dec 04 14:11:21.635 INFO [stderr] 10 | |     "adm", "rd0", "rd1", "rd2", "rd3", "clb", "iac", "cmc", "cma", "ral", "rar", "tcc", "dac",
Dec 04 14:11:21.635 INFO [stderr] 11 | |     "tcs", "stc", "daa", "kbp", "dcl"
Dec 04 14:11:21.635 INFO [stderr] 12 | | ];
Dec 04 14:11:21.635 INFO [stderr]    | |__^
Dec 04 14:11:21.635 INFO [stderr]    |
Dec 04 14:11:21.635 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 14:11:21.635 INFO [stderr] 
Dec 04 14:11:21.635 INFO [stderr] warning: enum is never used: `Token`
Dec 04 14:11:21.635 INFO [stderr]   --> src/bin/assembler.rs:14:1
Dec 04 14:11:21.635 INFO [stderr]    |
Dec 04 14:11:21.635 INFO [stderr] 14 | enum Token {
Dec 04 14:11:21.635 INFO [stderr]    | ^^^^^^^^^^
Dec 04 14:11:21.635 INFO [stderr] 
Dec 04 14:11:21.671 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.52s
Dec 04 14:11:21.673 INFO [stderr] su: No module specific data is present
Dec 04 14:11:21.989 INFO running `"docker" "inspect" "be141fcdc6251c8d57204681d1e3f1d4d3c88c5e417c25e538f0829516921caa"`
Dec 04 14:11:22.219 INFO running `"docker" "rm" "-f" "be141fcdc6251c8d57204681d1e3f1d4d3c88c5e417c25e538f0829516921caa"`
Dec 04 14:11:22.555 INFO [stdout] be141fcdc6251c8d57204681d1e3f1d4d3c88c5e417c25e538f0829516921caa