[INFO] fetching crate chip_8 0.2.0...
[INFO] checking chip_8-0.2.0 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] extracting crate chip_8 0.2.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate chip_8 0.2.0 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chip_8 0.2.0
[INFO] finished tweaking crates.io crate chip_8 0.2.0
[INFO] tweaked toml for crates.io crate chip_8 0.2.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cargo_metadata v0.10.0
[INFO] [stderr]   Downloaded bufrng v1.0.2
[INFO] [stderr]   Downloaded skeptic v0.13.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 928b56becc3c9147533ce5d9309697617e9c52be7e48b6f37f6d97af248d3b61
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "928b56becc3c9147533ce5d9309697617e9c52be7e48b6f37f6d97af248d3b61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "928b56becc3c9147533ce5d9309697617e9c52be7e48b6f37f6d97af248d3b61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "928b56becc3c9147533ce5d9309697617e9c52be7e48b6f37f6d97af248d3b61", kill_on_drop: false }`
[INFO] [stdout] 928b56becc3c9147533ce5d9309697617e9c52be7e48b6f37f6d97af248d3b61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bb3901cef77478d5cc6d94e0106e50555bb60da3ed56a550013d7ee6faf1452
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2bb3901cef77478d5cc6d94e0106e50555bb60da3ed56a550013d7ee6faf1452", kill_on_drop: false }`
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling bytecount v0.6.0
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]     Checking bufrng v1.0.2
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]     Checking version-sync v0.9.1
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]     Checking cargo_metadata v0.10.0
[INFO] [stderr]     Checking skeptic v0.13.5
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling chip_8 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `registers`
[INFO] [stdout]   --> src/vm.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 66 |     registers: Registers,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rng`
[INFO] [stdout]   --> src/vm.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     rng: R,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sys_fn`
[INFO] [stdout]   --> src/vm.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     sys_fn: fn(&mut Self, crate::instructions::Addr) -> crate::errors::Result<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `keypad`
[INFO] [stdout]   --> src/vm.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     keypad: crate::keypad::Keypad,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `waiting_on_any_keypress`
[INFO] [stdout]   --> src/vm.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 70 |     waiting_on_any_keypress: Option<VRegister>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `execute_instruction`
[INFO] [stdout]    --> src/vm.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 |     fn execute_instruction(&mut self, instruction: &Instruction) -> crate::errors::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.96s
[INFO] running `Command { std: "docker" "inspect" "2bb3901cef77478d5cc6d94e0106e50555bb60da3ed56a550013d7ee6faf1452", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bb3901cef77478d5cc6d94e0106e50555bb60da3ed56a550013d7ee6faf1452", kill_on_drop: false }`
[INFO] [stdout] 2bb3901cef77478d5cc6d94e0106e50555bb60da3ed56a550013d7ee6faf1452