[INFO] cloning repository https://github.com/sifton/gbers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sifton/gbers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsifton%2Fgbers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsifton%2Fgbers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a94b798299f625a7e94cb8cae3cb2f114735d7b
[INFO] testing sifton/gbers against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsifton%2Fgbers" "/workspace/builds/worker-17/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-17/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sifton/gbers on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sifton/gbers
[INFO] finished tweaking git repo https://github.com/sifton/gbers
[INFO] tweaked toml for git repo https://github.com/sifton/gbers written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] crate git repo https://github.com/sifton/gbers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded byte-slice-cast v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4110567d493c74fb401bf4ae46142901aba65ca7cb2451fdf5c3619067c6742
[INFO] running `Command { std: "docker" "start" "-a" "e4110567d493c74fb401bf4ae46142901aba65ca7cb2451fdf5c3619067c6742", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4110567d493c74fb401bf4ae46142901aba65ca7cb2451fdf5c3619067c6742", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4110567d493c74fb401bf4ae46142901aba65ca7cb2451fdf5c3619067c6742", kill_on_drop: false }`
[INFO] [stdout] e4110567d493c74fb401bf4ae46142901aba65ca7cb2451fdf5c3619067c6742
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f564f2bbfe657973ff317c1106e7501ddf06fa4dd551252e4702e311d3f2f446
[INFO] running `Command { std: "docker" "start" "-a" "f564f2bbfe657973ff317c1106e7501ddf06fa4dd551252e4702e311d3f2f446", kill_on_drop: false }`
[INFO] [stderr]    Compiling byte-slice-cast v0.1.0
[INFO] [stderr]    Compiling bitflags v1.0.1
[INFO] [stderr]    Compiling gbers v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::marker::PhantomData`
[INFO] [stdout]   --> src/hw/cart.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | use std::marker::PhantomData;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/hw/cart.rs:155:13
[INFO] [stdout]     |
[INFO] [stdout] 155 |     let x = try!(Cartridge::new_no_check(bytes));
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/hw/cart.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |     let _ = try!(check_header_sum(&x.rom));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/hw/cart.rs:163:15
[INFO] [stdout]     |
[INFO] [stdout] 163 |     let rom = try!(ROM::from_raw_bytes(bytes));
[INFO] [stdout]     |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/hw/cart.rs:165:17
[INFO] [stdout]     |
[INFO] [stdout] 165 |     let title = try!(read_title(&rom));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/hw/cart.rs:166:22
[INFO] [stdout]     |
[INFO] [stdout] 166 |     let components = try!(decode_components(&rom));
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/hw/cart.rs:167:18
[INFO] [stdout]     |
[INFO] [stdout] 167 |     let is_cgb = try!(decode_is_cgb(&rom));
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/hw/cart.rs:168:18
[INFO] [stdout]     |
[INFO] [stdout] 168 |     let is_sgb = try!(decode_is_sgb(&rom));
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/hw/cart.rs:365:17
[INFO] [stdout]     |
[INFO] [stdout] 365 |   let _romnum = try!(decode_rom_size(rom));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/hw/cart.rs:366:17
[INFO] [stdout]     |
[INFO] [stdout] 366 |   let _ramnum = try!(decode_ram_size(rom));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TryInto`
[INFO] [stdout]   --> src/hw/cpu/instr.rs:28:35
[INFO] [stdout]    |
[INFO] [stdout] 28 | use std::convert::{Into, TryFrom, TryInto};
[INFO] [stdout]    |                                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/hw/cpu/register.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     ((self.upper.get() << 8 + self.lower.get()) as u16)
[INFO] [stdout]    |     ^                                                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 46 -     ((self.upper.get() << 8 + self.lower.get()) as u16)
[INFO] [stdout] 46 +     (self.upper.get() << 8 + self.lower.get()) as u16
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::cart`
[INFO] [stdout]   --> src/hw/cpu/mod.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | use super::cart;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/hw/cart.rs:190:12
[INFO] [stdout]     |
[INFO] [stdout] 190 |         Ok(x) => bytes,
[INFO] [stdout]     |            ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raw`
[INFO] [stdout]   --> src/hw/cpu/instr.rs:75:17
[INFO] [stdout]    |
[INFO] [stdout] 75 |   pub fn decode(raw: &[u8]) -> Result<Instr> {
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_raw`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gbers` due to 2 previous errors; 64 warnings emitted
[INFO] [stdout] warning: unused variable: `dec`
[INFO] [stdout]    --> src/hw/cpu/instr.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |     fn from(dec: Decoder<Start>) -> Decoder<Prefix> {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_dec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rom`
[INFO] [stdout]   --> src/hw/cart.rs:62:3
[INFO] [stdout]    |
[INFO] [stdout] 62 |   rom: &'a ROM,
[INFO] [stdout]    |   ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `ROMSlice` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/hw/cart.rs:60:10
[INFO] [stdout]    |
[INFO] [stdout] 60 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `KILOBYTE_BYTES`
[INFO] [stdout]    --> src/hw/cart.rs:111:1
[INFO] [stdout]     |
[INFO] [stdout] 111 | const KILOBYTE_BYTES: usize = 1024;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `has_component`
[INFO] [stdout]    --> src/hw/cart.rs:206:10
[INFO] [stdout]     |
[INFO] [stdout] 206 |   pub fn has_component(&self, cmp: Component) -> bool {
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `bytes`
[INFO] [stdout]    --> src/hw/cart.rs:260:6
[INFO] [stdout]     |
[INFO] [stdout] 260 |   fn bytes(&self) -> &'a [u8] {
[INFO] [stdout]     |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size_bytes`
[INFO] [stdout]    --> src/hw/cart.rs:277:10
[INFO] [stdout]     |
[INFO] [stdout] 277 |   pub fn size_bytes(self) -> usize {
[INFO] [stdout]     |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size_bytes`
[INFO] [stdout]    --> src/hw/cart.rs:320:10
[INFO] [stdout]     |
[INFO] [stdout] 320 |   pub fn size_bytes(self) -> usize {
[INFO] [stdout]     |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Processor`
[INFO] [stdout]   --> src/hw/cpu/mod.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct Processor {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/hw/cpu/mod.rs:37:10
[INFO] [stdout]    |
[INFO] [stdout] 37 |   pub fn new() -> Processor {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `start`
[INFO] [stdout]   --> src/hw/cpu/mod.rs:48:10
[INFO] [stdout]    |
[INFO] [stdout] 48 |   pub fn start(&mut self) {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MMU`
[INFO] [stdout]   --> src/hw/mmu.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct MMU {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `META_ENTRY`
[INFO] [stdout]    --> src/hw/cart.rs:122:3
[INFO] [stdout]     |
[INFO] [stdout] 122 |   pub const META_ENTRY: Region<[u8; 0x4]>  = Region(0x100, 0x104, PhantomData);
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `META_LOGO`
[INFO] [stdout]    --> src/hw/cart.rs:123:3
[INFO] [stdout]     |
[INFO] [stdout] 123 |   pub const META_LOGO: Region<[u8; 0x30]>   = Region(0x104, 0x134, PhantomData);
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `META_MANUFACTURER`
[INFO] [stdout]    --> src/hw/cart.rs:125:3
[INFO] [stdout]     |
[INFO] [stdout] 125 |   pub const META_MANUFACTURER: Region<u32>  = Region(0x13F, 0x143, PhantomData);
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `META_LICENSEE`
[INFO] [stdout]    --> src/hw/cart.rs:127:3
[INFO] [stdout]     |
[INFO] [stdout] 127 |   pub const META_LICENSEE: Region<u16>      = Region(0x144, 0x146, PhantomData);
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `META_DEST`
[INFO] [stdout]    --> src/hw/cart.rs:132:3
[INFO] [stdout]     |
[INFO] [stdout] 132 |   pub const META_DEST: Region<u8>          = Region(0x14A, 0x14B, PhantomData);
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `META_LICENSEE_OLD`
[INFO] [stdout]    --> src/hw/cart.rs:133:3
[INFO] [stdout]     |
[INFO] [stdout] 133 |   pub const META_LICENSEE_OLD: Region<u8>  = Region(0x14B, 0x14C, PhantomData);
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `META_VERSION`
[INFO] [stdout]    --> src/hw/cart.rs:134:3
[INFO] [stdout]     |
[INFO] [stdout] 134 |   pub const META_VERSION: Region<u8>       = Region(0x14C, 0x14D, PhantomData);
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `META_CHECKSUM_ALL`
[INFO] [stdout]    --> src/hw/cart.rs:136:3
[INFO] [stdout]     |
[INFO] [stdout] 136 |   pub const META_CHECKSUM_ALL: Region<u16> = Region(0x14E, 0x150, PhantomData);
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EXEC_BOOT`
[INFO] [stdout]    --> src/hw/cart.rs:140:3
[INFO] [stdout]     |
[INFO] [stdout] 140 |   pub const EXEC_BOOT: Region<[u8; 256]>   = Region(0x0, 0x256, PhantomData);
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CYCLE_INCREMENT`
[INFO] [stdout]   --> src/hw/cpu/clock.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | const CYCLE_INCREMENT: usize = 4;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Clock`
[INFO] [stdout]   --> src/hw/cpu/clock.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Clock {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Frequency`
[INFO] [stdout]   --> src/hw/cpu/clock.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub enum Frequency {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/hw/cpu/clock.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn new(freq: Frequency) -> Clock {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_start_time`
[INFO] [stdout]   --> src/hw/cpu/clock.rs:37:10
[INFO] [stdout]    |
[INFO] [stdout] 37 |   pub fn new_start_time(time: usize, freq: Frequency) -> Clock {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `incr`
[INFO] [stdout]   --> src/hw/cpu/clock.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 |   pub fn incr(&mut self) {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `incr_n`
[INFO] [stdout]   --> src/hw/cpu/clock.rs:48:10
[INFO] [stdout]    |
[INFO] [stdout] 48 |   pub fn incr_n(&mut self, n: usize) {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `time`
[INFO] [stdout]   --> src/hw/cpu/clock.rs:52:10
[INFO] [stdout]    |
[INFO] [stdout] 52 |   pub fn time(&self) -> usize {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Immediate`
[INFO] [stdout]   --> src/hw/cpu/instr.rs:44:6
[INFO] [stdout]    |
[INFO] [stdout] 44 | enum Immediate {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Opcode`
[INFO] [stdout]   --> src/hw/cpu/instr.rs:50:6
[INFO] [stdout]    |
[INFO] [stdout] 50 | enum Opcode {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Instr`
[INFO] [stdout]   --> src/hw/cpu/instr.rs:54:6
[INFO] [stdout]    |
[INFO] [stdout] 54 | enum Instr {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Result`
[INFO] [stdout]   --> src/hw/cpu/instr.rs:71:1
[INFO] [stdout]    |
[INFO] [stdout] 71 | type Result<T> = result::Result<T, decode::DecodeErr>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `decode`
[INFO] [stdout]   --> src/hw/cpu/instr.rs:75:10
[INFO] [stdout]    |
[INFO] [stdout] 75 |   pub fn decode(raw: &[u8]) -> Result<Instr> {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Zero`
[INFO] [stdout]   --> src/hw/cpu/register.rs:38:3
[INFO] [stdout]    |
[INFO] [stdout] 38 |   Zero = 1 << 7,
[INFO] [stdout]    |   ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `AddSub`
[INFO] [stdout]   --> src/hw/cpu/register.rs:39:3
[INFO] [stdout]    |
[INFO] [stdout] 39 |   AddSub = 1 << 6,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `HalfCarry`
[INFO] [stdout]   --> src/hw/cpu/register.rs:40:3
[INFO] [stdout]    |
[INFO] [stdout] 40 |   HalfCarry = 1 << 5,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Carry`
[INFO] [stdout]   --> src/hw/cpu/register.rs:41:3
[INFO] [stdout]    |
[INFO] [stdout] 41 |   Carry = 1 << 4
[INFO] [stdout]    |   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `upper`
[INFO] [stdout]   --> src/hw/cpu/register.rs:57:10
[INFO] [stdout]    |
[INFO] [stdout] 57 |   pub fn upper(&self) -> &Reg {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `upper_mut`
[INFO] [stdout]   --> src/hw/cpu/register.rs:61:10
[INFO] [stdout]    |
[INFO] [stdout] 61 |   pub fn upper_mut(&mut self) -> &mut Reg {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lower`
[INFO] [stdout]   --> src/hw/cpu/register.rs:65:10
[INFO] [stdout]    |
[INFO] [stdout] 65 |   pub fn lower(&self) -> &Reg {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lower_mut`
[INFO] [stdout]   --> src/hw/cpu/register.rs:69:10
[INFO] [stdout]    |
[INFO] [stdout] 69 |   pub fn lower_mut(&mut self) -> &mut Reg {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/hw/cpu/register.rs:75:10
[INFO] [stdout]    |
[INFO] [stdout] 75 |   pub fn new(initial: u16) -> Self {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/hw/cpu/register.rs:86:10
[INFO] [stdout]    |
[INFO] [stdout] 86 |   pub fn new(initial: u8) -> Self {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Result`
[INFO] [stdout]    --> src/hw/cpu/instr.rs:109:3
[INFO] [stdout]     |
[INFO] [stdout] 109 |   pub type Result<T> = result::Result<T, DecodeErr>;
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bytes`
[INFO] [stdout]    --> src/hw/cpu/instr.rs:115:5
[INFO] [stdout]     |
[INFO] [stdout] 115 |     bytes: [u8; 4],
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `state`
[INFO] [stdout]    --> src/hw/cpu/instr.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 |     state: S,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/hw/cpu/instr.rs:148:12
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub fn new(bytes: [u8; 4]) -> Decoder<Start> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![feature(try_from)]
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `try_from` has been stable since 1.34.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/main.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![feature(try_from)]
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]    --> src/hw/cart.rs:431:19
[INFO] [stdout]     |
[INFO] [stdout] 431 |   for &b in bytes.into_iter() {
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 431 |   for &b in bytes.iter() {
[INFO] [stdout]     |                   ~~~~
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 431 -   for &b in bytes.into_iter() {
[INFO] [stdout] 431 +   for &b in bytes {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 64 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f564f2bbfe657973ff317c1106e7501ddf06fa4dd551252e4702e311d3f2f446", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f564f2bbfe657973ff317c1106e7501ddf06fa4dd551252e4702e311d3f2f446", kill_on_drop: false }`
[INFO] [stdout] f564f2bbfe657973ff317c1106e7501ddf06fa4dd551252e4702e311d3f2f446