[INFO] cloning repository https://github.com/exfargo/AssemblyEmulator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/exfargo/AssemblyEmulator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexfargo%2FAssemblyEmulator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexfargo%2FAssemblyEmulator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cdd144d95ff207a20945592afbb25b33280bf770
[INFO] checking exfargo/AssemblyEmulator against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexfargo%2FAssemblyEmulator" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/exfargo/AssemblyEmulator
[INFO] finished tweaking git repo https://github.com/exfargo/AssemblyEmulator
[INFO] tweaked toml for git repo https://github.com/exfargo/AssemblyEmulator written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/exfargo/AssemblyEmulator on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/exfargo/AssemblyEmulator 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3556873a8d60856076ce58455673c2fbdc063056c637dc06962fbde11a56c39
[INFO] running `Command { std: "docker" "start" "-a" "a3556873a8d60856076ce58455673c2fbdc063056c637dc06962fbde11a56c39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3556873a8d60856076ce58455673c2fbdc063056c637dc06962fbde11a56c39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3556873a8d60856076ce58455673c2fbdc063056c637dc06962fbde11a56c39", kill_on_drop: false }`
[INFO] [stdout] a3556873a8d60856076ce58455673c2fbdc063056c637dc06962fbde11a56c39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8978a4517334fe82f963e63cd97c1fdcbef7c8caf3d6b419e1b8572d106c6e04
[INFO] running `Command { std: "docker" "start" "-a" "8978a4517334fe82f963e63cd97c1fdcbef7c8caf3d6b419e1b8572d106c6e04", kill_on_drop: false }`
[INFO] [stderr]     Checking cpu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:26:21
[INFO] [stdout]    |
[INFO] [stdout] 26 |         self.memory[usize::try_from(index).unwrap()]
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:30:34
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let x: u16 = self.memory[usize::try_from(index).unwrap()] as u16;
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:31:33
[INFO] [stdout]    |
[INFO] [stdout] 31 |         (x << 8) + (self.memory[usize::try_from(index + 1).unwrap()] as u16)
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 |         self.memory[usize::try_from(index).unwrap()] = byte
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:39:21
[INFO] [stdout]    |
[INFO] [stdout] 39 |         self.memory[usize::try_from(index).unwrap()] = (word >> 8) as u8;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:40:21
[INFO] [stdout]    |
[INFO] [stdout] 40 |         self.memory[usize::try_from(index + 1).unwrap()] = word as u8;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cpu` (bin "cpu") due to 6 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:26:21
[INFO] [stdout]    |
[INFO] [stdout] 26 |         self.memory[usize::try_from(index).unwrap()]
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:30:34
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let x: u16 = self.memory[usize::try_from(index).unwrap()] as u16;
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:31:33
[INFO] [stdout]    |
[INFO] [stdout] 31 |         (x << 8) + (self.memory[usize::try_from(index + 1).unwrap()] as u16)
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 |         self.memory[usize::try_from(index).unwrap()] = byte
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:39:21
[INFO] [stdout]    |
[INFO] [stdout] 39 |         self.memory[usize::try_from(index).unwrap()] = (word >> 8) as u8;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mem/ram.rs:40:21
[INFO] [stdout]    |
[INFO] [stdout] 40 |         self.memory[usize::try_from(index + 1).unwrap()] = word as u8;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cpu` (bin "cpu" test) due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "8978a4517334fe82f963e63cd97c1fdcbef7c8caf3d6b419e1b8572d106c6e04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8978a4517334fe82f963e63cd97c1fdcbef7c8caf3d6b419e1b8572d106c6e04", kill_on_drop: false }`
[INFO] [stdout] 8978a4517334fe82f963e63cd97c1fdcbef7c8caf3d6b419e1b8572d106c6e04