[INFO] updating cached repository Virepri/synacor_challenge
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Virepri/synacor_challenge
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Virepri/synacor_challenge" "work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/Virepri/synacor_challenge"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/Virepri/synacor_challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Virepri/synacor_challenge" "work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/Virepri/synacor_challenge"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/Virepri/synacor_challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4717bd1a8a27849d7b57f56757f53f92123b39cb
[INFO] sha for GitHub repo Virepri/synacor_challenge: 4717bd1a8a27849d7b57f56757f53f92123b39cb
[INFO] validating manifest of Virepri/synacor_challenge on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Virepri/synacor_challenge on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Virepri/synacor_challenge
[INFO] finished frobbing Virepri/synacor_challenge
[INFO] frobbed toml for Virepri/synacor_challenge written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/Virepri/synacor_challenge/Cargo.toml
[INFO] started frobbing Virepri/synacor_challenge
[INFO] finished frobbing Virepri/synacor_challenge
[INFO] frobbed toml for Virepri/synacor_challenge written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/Virepri/synacor_challenge/Cargo.toml
[INFO] crate Virepri/synacor_challenge has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Virepri/synacor_challenge against try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-5/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/Virepri/synacor_challenge:/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" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f1ec95c97e59a255f2ebbe89cb4839514c5750088b88711c11958e9313c6b955
[INFO] running `"docker" "start" "-a" "f1ec95c97e59a255f2ebbe89cb4839514c5750088b88711c11958e9313c6b955"`
[INFO] [stderr]     Checking synacor_challenge v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `CPU`
[INFO] [stderr]  --> src/cpu/mod.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct CPU {
[INFO] [stderr]   | ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `load_program`
[INFO] [stderr]   --> src/cpu/mod.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn load_program(&mut self, prog: &Vec<u8>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `start_emulation`
[INFO] [stderr]   --> src/cpu/mod.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn start_emulation(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_from_mem`
[INFO] [stderr]   --> src/cpu/mod.rs:88:5
[INFO] [stderr]    |
[INFO] [stderr] 88 |     fn get_from_mem(&self, loc: usize, num: bool) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_location`
[INFO] [stderr]   --> src/cpu/mod.rs:98:5
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn set_location(&mut self, loc: usize, data: u16) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_register`
[INFO] [stderr]    --> src/cpu/mod.rs:108:1
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn is_register(loc: &usize) -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_cpu`
[INFO] [stderr]    --> src/cpu/mod.rs:112:1
[INFO] [stderr]     |
[INFO] [stderr] 112 | pub fn make_cpu() -> CPU {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Result` should have a snake case name
[INFO] [stderr]   --> src/cpu/mod.rs:72:30
[INFO] [stderr]    |
[INFO] [stderr] 72 |                         Some(Result) => {self.memory_pointer = Result as usize}
[INFO] [stderr]    |                              ^^^^^^ help: convert the identifier to snake case: `result`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/cpu/tests/mod.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |         let mut program = [17,5,2,15,0];
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Result` should have a snake case name
[INFO] [stderr]   --> src/cpu/mod.rs:72:30
[INFO] [stderr]    |
[INFO] [stderr] 72 |                         Some(Result) => {self.memory_pointer = Result as usize}
[INFO] [stderr]    |                              ^^^^^^ help: convert the identifier to snake case: `result`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `"docker" "inspect" "f1ec95c97e59a255f2ebbe89cb4839514c5750088b88711c11958e9313c6b955"`
[INFO] running `"docker" "rm" "-f" "f1ec95c97e59a255f2ebbe89cb4839514c5750088b88711c11958e9313c6b955"`
[INFO] [stdout] f1ec95c97e59a255f2ebbe89cb4839514c5750088b88711c11958e9313c6b955