[INFO] cloning repository https://github.com/NikodemMarek/lc3-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NikodemMarek/lc3-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNikodemMarek%2Flc3-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNikodemMarek%2Flc3-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f8d8319ca872b772fc0ab644e507c30201f980da
[INFO] checking NikodemMarek/lc3-rust 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%2FNikodemMarek%2Flc3-rust" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/NikodemMarek/lc3-rust
[INFO] finished tweaking git repo https://github.com/NikodemMarek/lc3-rust
[INFO] tweaked toml for git repo https://github.com/NikodemMarek/lc3-rust written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/NikodemMarek/lc3-rust 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/NikodemMarek/lc3-rust 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] dc45390d31f58e5939cc4ff1d24bc18d43a065c07a22f1fd635302d7bc2cc98d
[INFO] running `Command { std: "docker" "start" "-a" "dc45390d31f58e5939cc4ff1d24bc18d43a065c07a22f1fd635302d7bc2cc98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc45390d31f58e5939cc4ff1d24bc18d43a065c07a22f1fd635302d7bc2cc98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc45390d31f58e5939cc4ff1d24bc18d43a065c07a22f1fd635302d7bc2cc98d", kill_on_drop: false }`
[INFO] [stdout] dc45390d31f58e5939cc4ff1d24bc18d43a065c07a22f1fd635302d7bc2cc98d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] cb092dd91f937c3e7e2b7a65991b99f6036f95090c4e0a84f046b64b4949a149
[INFO] running `Command { std: "docker" "start" "-a" "cb092dd91f937c3e7e2b7a65991b99f6036f95090c4e0a84f046b64b4949a149", kill_on_drop: false }`
[INFO] [stderr]     Checking termios v0.3.3
[INFO] [stderr]     Checking lc3-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<u16, Infallible>
[INFO] [stdout]   --> src/hardware.rs:43:34
[INFO] [stdout]    |
[INFO] [stdout] 43 |         self.program_counter.set(program[0].try_into().unwrap());
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lc3-rust` (bin "lc3-rust") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<u16, Infallible>
[INFO] [stdout]   --> src/hardware.rs:43:34
[INFO] [stdout]    |
[INFO] [stdout] 43 |         self.program_counter.set(program[0].try_into().unwrap());
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lc3-rust` (bin "lc3-rust" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "cb092dd91f937c3e7e2b7a65991b99f6036f95090c4e0a84f046b64b4949a149", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb092dd91f937c3e7e2b7a65991b99f6036f95090c4e0a84f046b64b4949a149", kill_on_drop: false }`
[INFO] [stdout] cb092dd91f937c3e7e2b7a65991b99f6036f95090c4e0a84f046b64b4949a149