Dec 19 21:24:36.839 INFO checking Virepri/synacor_challenge against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 21:24:36.839 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 21:24:37.096 INFO [stdout] 1a0cd1af348fd57aa7d6a954c524dc16f42785579a932d4d79032427587ae8ae
Dec 19 21:24:37.098 INFO running `"docker" "start" "-a" "1a0cd1af348fd57aa7d6a954c524dc16f42785579a932d4d79032427587ae8ae"`
Dec 19 21:24:38.416 INFO [stderr]     Checking synacor_challenge v0.1.0 (/opt/crater/workdir)
Dec 19 21:24:38.921 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:24:38.921 INFO [stderr]   --> src/cpu/tests/mod.rs:47:13
Dec 19 21:24:38.921 INFO [stderr]    |
Dec 19 21:24:38.921 INFO [stderr] 47 |         let mut program = [17,5,2,15,0];
Dec 19 21:24:38.921 INFO [stderr]    |             ----^^^^^^^
Dec 19 21:24:38.921 INFO [stderr]    |             |
Dec 19 21:24:38.921 INFO [stderr]    |             help: remove this `mut`
Dec 19 21:24:38.921 INFO [stderr]    |
Dec 19 21:24:38.924 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 21:24:38.924 INFO [stderr] 
Dec 19 21:24:38.930 INFO [stderr] warning: variable `Result` should have a snake case name such as `result`
Dec 19 21:24:38.930 INFO [stderr]   --> src/cpu/mod.rs:72:30
Dec 19 21:24:38.930 INFO [stderr]    |
Dec 19 21:24:38.930 INFO [stderr] 72 |                         Some(Result) => {self.memory_pointer = Result as usize}
Dec 19 21:24:38.930 INFO [stderr]    |                              ^^^^^^
Dec 19 21:24:38.930 INFO [stderr]    |
Dec 19 21:24:38.930 INFO [stderr]    = note: #[warn(non_snake_case)] on by default
Dec 19 21:24:38.930 INFO [stderr] 
Dec 19 21:24:38.956 INFO [stderr] warning: struct is never constructed: `CPU`
Dec 19 21:24:38.956 INFO [stderr]  --> src/cpu/mod.rs:6:1
Dec 19 21:24:38.956 INFO [stderr]   |
Dec 19 21:24:38.956 INFO [stderr] 6 | pub struct CPU {
Dec 19 21:24:38.956 INFO [stderr]   | ^^^^^^^^^^^^^^
Dec 19 21:24:38.956 INFO [stderr]   |
Dec 19 21:24:38.956 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 21:24:38.956 INFO [stderr] 
Dec 19 21:24:38.956 INFO [stderr] warning: method is never used: `load_program`
Dec 19 21:24:38.956 INFO [stderr]   --> src/cpu/mod.rs:14:5
Dec 19 21:24:38.956 INFO [stderr]    |
Dec 19 21:24:38.957 INFO [stderr] 14 |     pub fn load_program(&mut self, prog: &Vec<u8>) {
Dec 19 21:24:38.957 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:38.957 INFO [stderr] 
Dec 19 21:24:38.957 INFO [stderr] warning: method is never used: `start_emulation`
Dec 19 21:24:38.957 INFO [stderr]   --> src/cpu/mod.rs:20:5
Dec 19 21:24:38.957 INFO [stderr]    |
Dec 19 21:24:38.957 INFO [stderr] 20 |     pub fn start_emulation(&mut self) {
Dec 19 21:24:38.957 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:38.957 INFO [stderr] 
Dec 19 21:24:38.957 INFO [stderr] warning: method is never used: `get_from_mem`
Dec 19 21:24:38.957 INFO [stderr]   --> src/cpu/mod.rs:88:5
Dec 19 21:24:38.957 INFO [stderr]    |
Dec 19 21:24:38.957 INFO [stderr] 88 |     fn get_from_mem(&self, loc: usize, num: bool) -> u16 {
Dec 19 21:24:38.957 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:38.957 INFO [stderr] 
Dec 19 21:24:38.957 INFO [stderr] warning: method is never used: `set_location`
Dec 19 21:24:38.957 INFO [stderr]   --> src/cpu/mod.rs:98:5
Dec 19 21:24:38.957 INFO [stderr]    |
Dec 19 21:24:38.957 INFO [stderr] 98 |     fn set_location(&mut self, loc: usize, data: u16) {
Dec 19 21:24:38.957 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:38.957 INFO [stderr] 
Dec 19 21:24:38.957 INFO [stderr] warning: function is never used: `is_register`
Dec 19 21:24:38.957 INFO [stderr]    --> src/cpu/mod.rs:108:1
Dec 19 21:24:38.957 INFO [stderr]     |
Dec 19 21:24:38.957 INFO [stderr] 108 | fn is_register(loc: &usize) -> bool {
Dec 19 21:24:38.957 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:38.957 INFO [stderr] 
Dec 19 21:24:38.957 INFO [stderr] warning: function is never used: `make_cpu`
Dec 19 21:24:38.957 INFO [stderr]    --> src/cpu/mod.rs:112:1
Dec 19 21:24:38.957 INFO [stderr]     |
Dec 19 21:24:38.957 INFO [stderr] 112 | pub fn make_cpu() -> CPU {
Dec 19 21:24:38.957 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:38.957 INFO [stderr] 
Dec 19 21:24:38.984 INFO [stderr] warning: variable `Result` should have a snake case name such as `result`
Dec 19 21:24:38.984 INFO [stderr]   --> src/cpu/mod.rs:72:30
Dec 19 21:24:38.992 INFO [stderr]    |
Dec 19 21:24:38.992 INFO [stderr] 72 |                         Some(Result) => {self.memory_pointer = Result as usize}
Dec 19 21:24:38.992 INFO [stderr]    |                              ^^^^^^
Dec 19 21:24:38.992 INFO [stderr]    |
Dec 19 21:24:38.992 INFO [stderr]    = note: #[warn(non_snake_case)] on by default
Dec 19 21:24:38.992 INFO [stderr] 
Dec 19 21:24:39.032 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
Dec 19 21:24:39.900 INFO running `"docker" "inspect" "1a0cd1af348fd57aa7d6a954c524dc16f42785579a932d4d79032427587ae8ae"`
Dec 19 21:24:40.084 INFO running `"docker" "rm" "-f" "1a0cd1af348fd57aa7d6a954c524dc16f42785579a932d4d79032427587ae8ae"`
Dec 19 21:24:40.322 INFO [stdout] 1a0cd1af348fd57aa7d6a954c524dc16f42785579a932d4d79032427587ae8ae