[INFO] fetching crate riscv-codec 0.4.0...
[INFO] checking riscv-codec-0.4.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate riscv-codec 0.4.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate riscv-codec 0.4.0
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate riscv-codec 0.4.0
[INFO] tweaked toml for crates.io crate riscv-codec 0.4.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate riscv-codec 0.4.0 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 crates.io crate riscv-codec 0.4.0 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-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] abd05cf64315953794cc6c4c83914737ab68b37cf5a213f00ab5990a88c21f52
[INFO] running `Command { std: "docker" "start" "-a" "abd05cf64315953794cc6c4c83914737ab68b37cf5a213f00ab5990a88c21f52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abd05cf64315953794cc6c4c83914737ab68b37cf5a213f00ab5990a88c21f52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abd05cf64315953794cc6c4c83914737ab68b37cf5a213f00ab5990a88c21f52", kill_on_drop: false }`
[INFO] [stdout] abd05cf64315953794cc6c4c83914737ab68b37cf5a213f00ab5990a88c21f52
[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] cfdf353631479eb45946901ea2d1a4c7c5a337fbe41a601ea3f081605c19d22a
[INFO] running `Command { std: "docker" "start" "-a" "cfdf353631479eb45946901ea2d1a4c7c5a337fbe41a601ea3f081605c19d22a", kill_on_drop: false }`
[INFO] [stderr]    Compiling litrs v0.4.1
[INFO] [stderr]    Compiling riscv-codec-proc-macros v0.3.0
[INFO] [stderr]     Checking riscv-codec v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<CIRegister, Infallible>
[INFO] [stdout]    --> src/cinstruction.rs:221:20
[INFO] [stdout]     |
[INFO] [stdout] 221 |         let crs2 = CIRegister::try_from((instruction >> 2) & 0b111).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 `riscv-codec` (lib) 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<CIRegister, Infallible>
[INFO] [stdout]    --> src/cinstruction.rs:221:20
[INFO] [stdout]     |
[INFO] [stdout] 221 |         let crs2 = CIRegister::try_from((instruction >> 2) & 0b111).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 `riscv-codec` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "cfdf353631479eb45946901ea2d1a4c7c5a337fbe41a601ea3f081605c19d22a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfdf353631479eb45946901ea2d1a4c7c5a337fbe41a601ea3f081605c19d22a", kill_on_drop: false }`
[INFO] [stdout] cfdf353631479eb45946901ea2d1a4c7c5a337fbe41a601ea3f081605c19d22a