Dec 19 22:23:43.765 INFO checking PhilipDaniels/word_chains against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 22:23:43.765 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/PhilipDaniels/word_chains:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 22:23:44.220 INFO [stdout] fa4f0e1e3aec00a0cd7194858a7ba3cbe3fa7d915d3cb0c233b109afac72afd3
Dec 19 22:23:44.223 INFO running `"docker" "start" "-a" "fa4f0e1e3aec00a0cd7194858a7ba3cbe3fa7d915d3cb0c233b109afac72afd3"`
Dec 19 22:23:46.077 INFO [stderr]    Compiling syn v0.12.14
Dec 19 22:23:54.348 INFO [stderr]    Compiling structopt-derive v0.2.5
Dec 19 22:23:57.248 INFO [stderr]     Checking structopt v0.2.5
Dec 19 22:23:57.797 INFO [stderr]     Checking word_chains v0.1.0 (/opt/crater/workdir)
Dec 19 22:23:58.467 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 22:23:58.467 INFO [stderr]  --> src/main.rs:1:1
Dec 19 22:23:58.467 INFO [stderr]   |
Dec 19 22:23:58.467 INFO [stderr] 1 | #[macro_use] extern crate structopt;
Dec 19 22:23:58.467 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 22:23:58.467 INFO [stderr]   |
Dec 19 22:23:58.467 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 22:23:58.467 INFO [stderr] 
Dec 19 22:23:58.508 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 22:23:58.508 INFO [stderr]  --> src/main.rs:1:1
Dec 19 22:23:58.508 INFO [stderr]   |
Dec 19 22:23:58.508 INFO [stderr] 1 | #[macro_use] extern crate structopt;
Dec 19 22:23:58.508 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 22:23:58.508 INFO [stderr]   |
Dec 19 22:23:58.508 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 22:23:58.508 INFO [stderr] 
Dec 19 22:23:58.654 INFO [stderr] warning: unused variable: `g`
Dec 19 22:23:58.654 INFO [stderr]   --> src/letter_differences.rs:36:13
Dec 19 22:23:58.654 INFO [stderr]    |
Dec 19 22:23:58.654 INFO [stderr] 36 |         let g = make_graph(&rwords_for_table);
Dec 19 22:23:58.654 INFO [stderr]    |             ^ help: consider using `_g` instead
Dec 19 22:23:58.654 INFO [stderr]    |
Dec 19 22:23:58.654 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 22:23:58.654 INFO [stderr] 
Dec 19 22:23:58.724 INFO [stderr] warning: unused variable: `g`
Dec 19 22:23:58.724 INFO [stderr]   --> src/letter_differences.rs:36:13
Dec 19 22:23:58.724 INFO [stderr]    |
Dec 19 22:23:58.724 INFO [stderr] 36 |         let g = make_graph(&rwords_for_table);
Dec 19 22:23:58.724 INFO [stderr]    |             ^ help: consider using `_g` instead
Dec 19 22:23:58.724 INFO [stderr]    |
Dec 19 22:23:58.724 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 22:23:58.724 INFO [stderr] 
Dec 19 22:23:58.736 INFO [stderr] warning: field is never used: `word`
Dec 19 22:23:58.736 INFO [stderr]  --> src/graph.rs:4:5
Dec 19 22:23:58.736 INFO [stderr]   |
Dec 19 22:23:58.736 INFO [stderr] 4 |     word: &'word String,
Dec 19 22:23:58.736 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 19 22:23:58.736 INFO [stderr]   |
Dec 19 22:23:58.736 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 22:23:58.736 INFO [stderr] 
Dec 19 22:23:58.736 INFO [stderr] warning: method is never used: `word`
Dec 19 22:23:58.736 INFO [stderr]   --> src/graph.rs:18:5
Dec 19 22:23:58.736 INFO [stderr]    |
Dec 19 22:23:58.736 INFO [stderr] 18 |     fn word(&self) -> &String {
Dec 19 22:23:58.736 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 22:23:58.736 INFO [stderr] 
Dec 19 22:23:58.769 INFO [stderr] warning: field is never used: `word`
Dec 19 22:23:58.769 INFO [stderr]  --> src/graph.rs:4:5
Dec 19 22:23:58.769 INFO [stderr]   |
Dec 19 22:23:58.769 INFO [stderr] 4 |     word: &'word String,
Dec 19 22:23:58.769 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 19 22:23:58.769 INFO [stderr]   |
Dec 19 22:23:58.769 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 22:23:58.769 INFO [stderr] 
Dec 19 22:23:58.769 INFO [stderr] warning: method is never used: `word`
Dec 19 22:23:58.769 INFO [stderr]   --> src/graph.rs:18:5
Dec 19 22:23:58.769 INFO [stderr]    |
Dec 19 22:23:58.769 INFO [stderr] 18 |     fn word(&self) -> &String {
Dec 19 22:23:58.769 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 22:23:58.769 INFO [stderr] 
Dec 19 22:23:58.824 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.83s
Dec 19 22:23:59.736 INFO running `"docker" "inspect" "fa4f0e1e3aec00a0cd7194858a7ba3cbe3fa7d915d3cb0c233b109afac72afd3"`
Dec 19 22:24:00.050 INFO running `"docker" "rm" "-f" "fa4f0e1e3aec00a0cd7194858a7ba3cbe3fa7d915d3cb0c233b109afac72afd3"`
Dec 19 22:24:00.344 INFO [stdout] fa4f0e1e3aec00a0cd7194858a7ba3cbe3fa7d915d3cb0c233b109afac72afd3