Dec 17 19:43:34.159 INFO checking mfs/box against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 19:43:34.159 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/mfs/box:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 19:43:34.410 INFO [stdout] 08b11442747ce17422e3508b43c14aaf58762aca223f5cc6e63ab91934bdebcc
Dec 17 19:43:34.412 INFO running `"docker" "start" "-a" "08b11442747ce17422e3508b43c14aaf58762aca223f5cc6e63ab91934bdebcc"`
Dec 17 19:43:35.012 INFO [stderr]     Checking box v0.1.0 (/opt/crater/workdir)
Dec 17 19:43:35.197 INFO [stderr] warning: variable does not need to be mutable
Dec 17 19:43:35.197 INFO [stderr]   --> src/bin/assembler.rs:24:9
Dec 17 19:43:35.197 INFO [stderr]    |
Dec 17 19:43:35.197 INFO [stderr] 24 |     let mut reader = BufReader::new(f);
Dec 17 19:43:35.197 INFO [stderr]    |         ----^^^^^^
Dec 17 19:43:35.197 INFO [stderr]    |         |
Dec 17 19:43:35.197 INFO [stderr]    |         help: remove this `mut`
Dec 17 19:43:35.197 INFO [stderr]    |
Dec 17 19:43:35.197 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 19:43:35.197 INFO [stderr] 
Dec 17 19:43:35.197 INFO [stderr] warning: constant item is never used: `INSTRUCTIONS`
Dec 17 19:43:35.197 INFO [stderr]   --> src/bin/assembler.rs:7:1
Dec 17 19:43:35.197 INFO [stderr]    |
Dec 17 19:43:35.197 INFO [stderr] 7  | / const INSTRUCTIONS: &'static [&'static str] = &[
Dec 17 19:43:35.197 INFO [stderr] 8  | |     "nop", "jcn", "fim", "src", "fin", "jin", "jun", "jms", "inc", "isz", "add", "sub", "ld",
Dec 17 19:43:35.197 INFO [stderr] 9  | |     "xch", "bbl", "ldm", "wrm", "wmp", "wrr", "wr0", "wr1", "wr2", "wr3", "sbm", "rdm", "rdr",
Dec 17 19:43:35.197 INFO [stderr] 10 | |     "adm", "rd0", "rd1", "rd2", "rd3", "clb", "iac", "cmc", "cma", "ral", "rar", "tcc", "dac",
Dec 17 19:43:35.197 INFO [stderr] 11 | |     "tcs", "stc", "daa", "kbp", "dcl"
Dec 17 19:43:35.197 INFO [stderr] 12 | | ];
Dec 17 19:43:35.197 INFO [stderr]    | |__^
Dec 17 19:43:35.197 INFO [stderr]    |
Dec 17 19:43:35.198 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 19:43:35.198 INFO [stderr] 
Dec 17 19:43:35.198 INFO [stderr] warning: enum is never used: `Token`
Dec 17 19:43:35.198 INFO [stderr]   --> src/bin/assembler.rs:14:1
Dec 17 19:43:35.198 INFO [stderr]    |
Dec 17 19:43:35.198 INFO [stderr] 14 | enum Token {
Dec 17 19:43:35.198 INFO [stderr]    | ^^^^^^^^^^
Dec 17 19:43:35.199 INFO [stderr] 
Dec 17 19:43:35.320 INFO [stderr] warning: variable does not need to be mutable
Dec 17 19:43:35.320 INFO [stderr]   --> src/bin/assembler.rs:24:9
Dec 17 19:43:35.320 INFO [stderr]    |
Dec 17 19:43:35.321 INFO [stderr] 24 |     let mut reader = BufReader::new(f);
Dec 17 19:43:35.321 INFO [stderr]    |         ----^^^^^^
Dec 17 19:43:35.321 INFO [stderr]    |         |
Dec 17 19:43:35.321 INFO [stderr]    |         help: remove this `mut`
Dec 17 19:43:35.321 INFO [stderr]    |
Dec 17 19:43:35.321 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 19:43:35.321 INFO [stderr] 
Dec 17 19:43:35.321 INFO [stderr] warning: constant item is never used: `INSTRUCTIONS`
Dec 17 19:43:35.321 INFO [stderr]   --> src/bin/assembler.rs:7:1
Dec 17 19:43:35.321 INFO [stderr]    |
Dec 17 19:43:35.321 INFO [stderr] 7  | / const INSTRUCTIONS: &'static [&'static str] = &[
Dec 17 19:43:35.321 INFO [stderr] 8  | |     "nop", "jcn", "fim", "src", "fin", "jin", "jun", "jms", "inc", "isz", "add", "sub", "ld",
Dec 17 19:43:35.321 INFO [stderr] 9  | |     "xch", "bbl", "ldm", "wrm", "wmp", "wrr", "wr0", "wr1", "wr2", "wr3", "sbm", "rdm", "rdr",
Dec 17 19:43:35.321 INFO [stderr] 10 | |     "adm", "rd0", "rd1", "rd2", "rd3", "clb", "iac", "cmc", "cma", "ral", "rar", "tcc", "dac",
Dec 17 19:43:35.321 INFO [stderr] 11 | |     "tcs", "stc", "daa", "kbp", "dcl"
Dec 17 19:43:35.321 INFO [stderr] 12 | | ];
Dec 17 19:43:35.321 INFO [stderr]    | |__^
Dec 17 19:43:35.321 INFO [stderr]    |
Dec 17 19:43:35.321 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 19:43:35.321 INFO [stderr] 
Dec 17 19:43:35.321 INFO [stderr] warning: enum is never used: `Token`
Dec 17 19:43:35.321 INFO [stderr]   --> src/bin/assembler.rs:14:1
Dec 17 19:43:35.321 INFO [stderr]    |
Dec 17 19:43:35.321 INFO [stderr] 14 | enum Token {
Dec 17 19:43:35.321 INFO [stderr]    | ^^^^^^^^^^
Dec 17 19:43:35.321 INFO [stderr] 
Dec 17 19:43:35.414 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
Dec 17 19:43:35.784 INFO running `"docker" "inspect" "08b11442747ce17422e3508b43c14aaf58762aca223f5cc6e63ab91934bdebcc"`
Dec 17 19:43:35.910 INFO running `"docker" "rm" "-f" "08b11442747ce17422e3508b43c14aaf58762aca223f5cc6e63ab91934bdebcc"`
Dec 17 19:43:36.022 INFO [stdout] 08b11442747ce17422e3508b43c14aaf58762aca223f5cc6e63ab91934bdebcc