[INFO] fetching crate prandom 0.1.0...
[INFO] checking prandom-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate prandom 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate prandom 0.1.0
[INFO] finished tweaking crates.io crate prandom 0.1.0
[INFO] tweaked toml for crates.io crate prandom 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate prandom 0.1.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 2454c21376553b5c55b8828e4ac15109fa3d4ec2d2bb8b0251961d243145d0ff
[INFO] running `Command { std: "docker" "start" "-a" "2454c21376553b5c55b8828e4ac15109fa3d4ec2d2bb8b0251961d243145d0ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2454c21376553b5c55b8828e4ac15109fa3d4ec2d2bb8b0251961d243145d0ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2454c21376553b5c55b8828e4ac15109fa3d4ec2d2bb8b0251961d243145d0ff", kill_on_drop: false }`
[INFO] [stdout] 2454c21376553b5c55b8828e4ac15109fa3d4ec2d2bb8b0251961d243145d0ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 81d46c37a362150aa64bac087e461cf2a5b716f2549727dd337761944f4f80f8
[INFO] running `Command { std: "docker" "start" "-a" "81d46c37a362150aa64bac087e461cf2a5b716f2549727dd337761944f4f80f8", kill_on_drop: false }`
[INFO] [stderr]     Checking prandom v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mersenne_twister.rs:75:30
[INFO] [stdout]    |
[INFO] [stdout] 75 |               self._state[i] = 1812433253usize
[INFO] [stdout]    |  ______________________________^
[INFO] [stdout] 76 | |                                 .wrapping_mul(self._state[i - 1] ^ (self._state[i - 1] >> 30))
[INFO] [stdout] 77 | |                                 .try_into()
[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/multiply_with_carry.rs:37:23
[INFO] [stdout]    |
[INFO] [stdout] 37 |         self._seed = (<usize as TryInto<usize>>::try_into(C.wrapping_mul(self._seed)).unwrap()) + 1usize;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prandom` (lib) due to 2 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/mersenne_twister.rs:75:30
[INFO] [stdout]    |
[INFO] [stdout] 75 |               self._state[i] = 1812433253usize
[INFO] [stdout]    |  ______________________________^
[INFO] [stdout] 76 | |                                 .wrapping_mul(self._state[i - 1] ^ (self._state[i - 1] >> 30))
[INFO] [stdout] 77 | |                                 .try_into()
[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/multiply_with_carry.rs:37:23
[INFO] [stdout]    |
[INFO] [stdout] 37 |         self._seed = (<usize as TryInto<usize>>::try_into(C.wrapping_mul(self._seed)).unwrap()) + 1usize;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prandom` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "81d46c37a362150aa64bac087e461cf2a5b716f2549727dd337761944f4f80f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81d46c37a362150aa64bac087e461cf2a5b716f2549727dd337761944f4f80f8", kill_on_drop: false }`
[INFO] [stdout] 81d46c37a362150aa64bac087e461cf2a5b716f2549727dd337761944f4f80f8