[INFO] cloning repository https://github.com/ccarral/6502-emu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ccarral/6502-emu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fccarral%2F6502-emu", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fccarral%2F6502-emu'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ec941d03f11bd97b20afb83720bf00be4d31876
[INFO] testing ccarral/6502-emu against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fccarral%2F6502-emu" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ccarral/6502-emu 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/ccarral/6502-emu
[INFO] finished tweaking git repo https://github.com/ccarral/6502-emu
[INFO] tweaked toml for git repo https://github.com/ccarral/6502-emu written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate git repo https://github.com/ccarral/6502-emu 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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] eb1d53b6ea0ba23af211b5302d993f7f176136b69d57155891244be059f541b1
[INFO] running `Command { std: "docker" "start" "-a" "eb1d53b6ea0ba23af211b5302d993f7f176136b69d57155891244be059f541b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb1d53b6ea0ba23af211b5302d993f7f176136b69d57155891244be059f541b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb1d53b6ea0ba23af211b5302d993f7f176136b69d57155891244be059f541b1", kill_on_drop: false }`
[INFO] [stdout] eb1d53b6ea0ba23af211b5302d993f7f176136b69d57155891244be059f541b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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] 58ef04ea2f7293b0ed8958eec84ca8f5ab6543262f5a51b118fc99edfb8e2930
[INFO] running `Command { std: "docker" "start" "-a" "58ef04ea2f7293b0ed8958eec84ca8f5ab6543262f5a51b118fc99edfb8e2930", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling textwrap v0.15.0
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling os_str_bytes v6.0.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v3.1.5
[INFO] [stderr]    Compiling mini6502 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `MAX_INST_CYCLES`
[INFO] [stdout]   --> src/cpu.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | const MAX_INST_CYCLES: u8 = 6;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `cycle_count`
[INFO] [stdout]   --> src/cpu.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     cycle_count: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_pc`
[INFO] [stdout]    --> src/cpu.rs:188:19
[INFO] [stdout]     |
[INFO] [stdout] 188 |     pub(crate) fn set_pc(&mut self, val: u16) {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_to_pc`
[INFO] [stdout]    --> src/cpu.rs:200:19
[INFO] [stdout]     |
[INFO] [stdout] 200 |     pub(crate) fn add_to_pc(&mut self, val: u16) {
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ac`
[INFO] [stdout]    --> src/cpu.rs:204:19
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub(crate) fn ac(&self) -> u8 {
[INFO] [stdout]     |                   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `p`
[INFO] [stdout]    --> src/cpu.rs:208:19
[INFO] [stdout]     |
[INFO] [stdout] 208 |     pub(crate) fn p(&self) -> u8 {
[INFO] [stdout]     |                   ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sp`
[INFO] [stdout]    --> src/cpu.rs:212:19
[INFO] [stdout]     |
[INFO] [stdout] 212 |     pub(crate) fn sp(&self) -> u16 {
[INFO] [stdout]     |                   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `x`
[INFO] [stdout]    --> src/cpu.rs:216:19
[INFO] [stdout]     |
[INFO] [stdout] 216 |     pub(crate) fn x(&self) -> u8 {
[INFO] [stdout]     |                   ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `y`
[INFO] [stdout]    --> src/cpu.rs:220:19
[INFO] [stdout]     |
[INFO] [stdout] 220 |     pub(crate) fn y(&self) -> u8 {
[INFO] [stdout]     |                   ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pc`
[INFO] [stdout]    --> src/cpu.rs:224:19
[INFO] [stdout]     |
[INFO] [stdout] 224 |     pub(crate) fn pc(&self) -> u16 {
[INFO] [stdout]     |                   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_byte_from_mem`
[INFO] [stdout]    --> src/cpu.rs:935:19
[INFO] [stdout]     |
[INFO] [stdout] 935 |     pub(crate) fn read_byte_from_mem(&self, addr: u16) -> u8 {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `format_flag`
[INFO] [stdout]     --> src/cpu.rs:1063:12
[INFO] [stdout]      |
[INFO] [stdout] 1063 |         fn format_flag(flag: bool) -> u8 {
[INFO] [stdout]      |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(bigint_helper_methods)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mini6502` due to 2 previous errors; 12 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "58ef04ea2f7293b0ed8958eec84ca8f5ab6543262f5a51b118fc99edfb8e2930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58ef04ea2f7293b0ed8958eec84ca8f5ab6543262f5a51b118fc99edfb8e2930", kill_on_drop: false }`
[INFO] [stdout] 58ef04ea2f7293b0ed8958eec84ca8f5ab6543262f5a51b118fc99edfb8e2930