[INFO] cloning repository https://github.com/drewwalton19216801/rusty502
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/drewwalton19216801/rusty502" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrewwalton19216801%2Frusty502", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrewwalton19216801%2Frusty502'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ecce997589d3b389b8fc68492e991faf0bd40d6
[INFO] checking drewwalton19216801/rusty502 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrewwalton19216801%2Frusty502" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/drewwalton19216801/rusty502 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/drewwalton19216801/rusty502
[INFO] finished tweaking git repo https://github.com/drewwalton19216801/rusty502
[INFO] tweaked toml for git repo https://github.com/drewwalton19216801/rusty502 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/drewwalton19216801/rusty502 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7370cf6176566a9517165bc506a6ba6f3d3150e49f60d694bab711dd16bca1df
[INFO] running `Command { std: "docker" "start" "-a" "7370cf6176566a9517165bc506a6ba6f3d3150e49f60d694bab711dd16bca1df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7370cf6176566a9517165bc506a6ba6f3d3150e49f60d694bab711dd16bca1df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7370cf6176566a9517165bc506a6ba6f3d3150e49f60d694bab711dd16bca1df", kill_on_drop: false }`
[INFO] [stdout] 7370cf6176566a9517165bc506a6ba6f3d3150e49f60d694bab711dd16bca1df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0517ccfcf96b363aee85ebfda06f2a89b1eeec76f0ef5a42e688e4bba08c792e
[INFO] running `Command { std: "docker" "start" "-a" "0517ccfcf96b363aee85ebfda06f2a89b1eeec76f0ef5a42e688e4bba08c792e", kill_on_drop: false }`
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stderr]     Checking cpu v0.1.0 (/opt/rustwide/workdir/cpu)
[INFO] [stderr]     Checking emulator v0.1.0 (/opt/rustwide/workdir/emulator)
[INFO] [stdout] warning: unused import: `RwLock`
[INFO] [stdout]  --> emulator/src/emulator.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> emulator/src/emulator.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `cpu` is imported redundantly
[INFO] [stdout]  --> emulator/src/emulator.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | use cpu::{self, cpu::Cpu};
[INFO] [stdout]   |           ^^^^ the item `cpu` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RwLock`
[INFO] [stdout]  --> emulator/src/emulator.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> emulator/src/emulator.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `cpu` is imported redundantly
[INFO] [stdout]  --> emulator/src/emulator.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | use cpu::{self, cpu::Cpu};
[INFO] [stdout]   |           ^^^^ the item `cpu` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> emulator/src/emulator.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 |         if (benchmark_mode) {
[INFO] [stdout]    |            ^              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 83 -         if (benchmark_mode) {
[INFO] [stdout] 83 +         if benchmark_mode {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> emulator/src/emulator.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 |         if (benchmark_mode) {
[INFO] [stdout]    |            ^              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 83 -         if (benchmark_mode) {
[INFO] [stdout] 83 +         if benchmark_mode {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add_hook` and `add_hook_range` are never used
[INFO] [stdout]   --> emulator/src/emulator/bus.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Bus {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub fn add_hook(&mut self, address: u16, hook: Hook) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn add_hook_range(&mut self, start: u16, end: u16, hook: Hook) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add_hook` and `add_hook_range` are never used
[INFO] [stdout]   --> emulator/src/emulator/bus.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Bus {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub fn add_hook(&mut self, address: u16, hook: Hook) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn add_hook_range(&mut self, start: u16, end: u16, hook: Hook) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `LED_STRIP` is never used
[INFO] [stdout]  --> emulator/src/emulator/devices/blink_led.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | static mut LED_STRIP: [bool; 8] = [false; 8];
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `LED_STRIP` is never used
[INFO] [stdout]  --> emulator/src/emulator/devices/blink_led.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | static mut LED_STRIP: [bool; 8] = [false; 8];
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `blink_led` is never used
[INFO] [stdout]  --> emulator/src/emulator/devices/blink_led.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn blink_led(address: u16, data: u8) {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `blink_led` is never used
[INFO] [stdout]  --> emulator/src/emulator/devices/blink_led.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn blink_led(address: u16, data: u8) {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "0517ccfcf96b363aee85ebfda06f2a89b1eeec76f0ef5a42e688e4bba08c792e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0517ccfcf96b363aee85ebfda06f2a89b1eeec76f0ef5a42e688e4bba08c792e", kill_on_drop: false }`
[INFO] [stdout] 0517ccfcf96b363aee85ebfda06f2a89b1eeec76f0ef5a42e688e4bba08c792e
[INFO] checking drewwalton19216801/rusty502 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrewwalton19216801%2Frusty502" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/drewwalton19216801/rusty502 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/drewwalton19216801/rusty502
[INFO] finished tweaking git repo https://github.com/drewwalton19216801/rusty502
[INFO] tweaked toml for git repo https://github.com/drewwalton19216801/rusty502 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/drewwalton19216801/rusty502 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0249b6ca68112f3a62b1699369eedf8694a8e31a42b478bf25a1532de23163bc
[INFO] running `Command { std: "docker" "start" "-a" "0249b6ca68112f3a62b1699369eedf8694a8e31a42b478bf25a1532de23163bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0249b6ca68112f3a62b1699369eedf8694a8e31a42b478bf25a1532de23163bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0249b6ca68112f3a62b1699369eedf8694a8e31a42b478bf25a1532de23163bc", kill_on_drop: false }`
[INFO] [stdout] 0249b6ca68112f3a62b1699369eedf8694a8e31a42b478bf25a1532de23163bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7590ef8fc0409266962e427993d2f8449bbfcfd07f739ab83420280de6dc2f5f
[INFO] running `Command { std: "docker" "start" "-a" "7590ef8fc0409266962e427993d2f8449bbfcfd07f739ab83420280de6dc2f5f", kill_on_drop: false }`
[INFO] [stderr]     Checking cpu v0.1.0 (/opt/rustwide/workdir/cpu)
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/argparse-0.2.2/src/parser.rs:206:18
[INFO] [stdout]     |
[INFO] [stdout] 206 |             _ => panic!(),
[INFO] [stdout]     |                  ^^^^^^^^ cannot satisfy `_ -> _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/argparse-0.2.2/src/parser.rs:340:29
[INFO] [stdout]     |
[INFO] [stdout] 340 |                       None => match self.parser.catchall_argument {
[INFO] [stdout]     |  _____________________________^
[INFO] [stdout] 341 | |                         Some(ref option) => {
[INFO] [stdout] 342 | |                             opt = option;
[INFO] [stdout] 343 | |                             break;
[INFO] [stdout] ...   |
[INFO] [stdout] 346 | |                             "Unexpected argument {}", arg)),
[INFO] [stdout] 347 | |                     }
[INFO] [stdout]     | |_____________________^ cannot satisfy `_ -> _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/argparse-0.2.2/src/parser.rs:809:22
[INFO] [stdout]     |
[INFO] [stdout] 809 |             .map_err(|c| exit(c))
[INFO] [stdout]     |                      ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]     |
[INFO] [stdout] 809 |             .map_err(|c| -> /* Type */ { exit(c) })
[INFO] [stdout]     |                          +++++++++++++++         +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0284.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `argparse` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "7590ef8fc0409266962e427993d2f8449bbfcfd07f739ab83420280de6dc2f5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7590ef8fc0409266962e427993d2f8449bbfcfd07f739ab83420280de6dc2f5f", kill_on_drop: false }`
[INFO] [stdout] 7590ef8fc0409266962e427993d2f8449bbfcfd07f739ab83420280de6dc2f5f