[INFO] fetching crate minnow 0.1.0...
[INFO] checking minnow-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate minnow 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate minnow 0.1.0
[INFO] finished tweaking crates.io crate minnow 0.1.0
[INFO] tweaked toml for crates.io crate minnow 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate minnow 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] crate crates.io crate minnow 0.1.0 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 587d9ce2f2ac0534730be6c8a8b7e2c0767bf81e6c6a6cc9cd9e7b89877a4cd6
[INFO] running `Command { std: "docker" "start" "-a" "587d9ce2f2ac0534730be6c8a8b7e2c0767bf81e6c6a6cc9cd9e7b89877a4cd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "587d9ce2f2ac0534730be6c8a8b7e2c0767bf81e6c6a6cc9cd9e7b89877a4cd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "587d9ce2f2ac0534730be6c8a8b7e2c0767bf81e6c6a6cc9cd9e7b89877a4cd6", kill_on_drop: false }`
[INFO] [stdout] 587d9ce2f2ac0534730be6c8a8b7e2c0767bf81e6c6a6cc9cd9e7b89877a4cd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 97f215d62fb2d0fc0a6ca4988097951cdcb1fdc9fb7581cc22072bacf5832174
[INFO] running `Command { std: "docker" "start" "-a" "97f215d62fb2d0fc0a6ca4988097951cdcb1fdc9fb7581cc22072bacf5832174", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling bitstream-io v1.2.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling darling_core v0.13.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling test-case v2.0.2
[INFO] [stderr]    Compiling darling_macro v0.13.4
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]     Checking arithmetic-coding-core v0.3.0
[INFO] [stderr]    Compiling darling v0.13.4
[INFO] [stderr]    Compiling arithmetic-coding v0.3.0
[INFO] [stderr]    Compiling minnow-derive v0.1.0
[INFO] [stderr]     Checking minnow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `minnow` (lib) due to 4 previous errors; 2 warnings emitted
[INFO] [stdout] warning: trait `BoundedModel` is never used
[INFO] [stdout]  --> src/bounded_model.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait BoundedModel {
[INFO] [stdout]   |           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: trait `Codec` is never used
[INFO] [stdout]   --> src/bounded_model.rs:14:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub trait Codec<M>
[INFO] [stdout]    |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u128>, !>
[INFO] [stdout]   --> src/float.rs:69:94
[INFO] [stdout]    |
[INFO] [stdout] 69 |       fn probability(&self, symbol: &Self::Symbol) -> Result<Range<Self::B>, Self::ValueError> {
[INFO] [stdout]    |  ______________________________________________________________________________________________^
[INFO] [stdout] 70 | |         Ok(self.scale(*symbol)..self.scale(*symbol) + 1)
[INFO] [stdout] 71 | |     }
[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<std::ops::Range<u128>, !>
[INFO] [stdout]   --> src/float.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |         Ok(self.scale(*symbol)..self.scale(*symbol) + 1)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u128>, !>
[INFO] [stdout]   --> src/impls/one_shot.rs:13:94
[INFO] [stdout]    |
[INFO] [stdout] 13 |       fn probability(&self, symbol: &Self::Symbol) -> Result<Range<Self::B>, Self::ValueError> {
[INFO] [stdout]    |  ______________________________________________________________________________________________^
[INFO] [stdout] 14 | |         Ok((*symbol).into()..(symbol + 1).into())
[INFO] [stdout] 15 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `BoundedModel` is never used
[INFO] [stdout]  --> src/bounded_model.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait BoundedModel {
[INFO] [stdout]   |           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Codec` is never used
[INFO] [stdout]   --> src/bounded_model.rs:14:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub trait Codec<M>
[INFO] [stdout]    |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u128>, !>
[INFO] [stdout]   --> src/impls/one_shot.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Ok((*symbol).into()..(symbol + 1).into())
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u128>, !>
[INFO] [stdout]   --> src/float.rs:69:94
[INFO] [stdout]    |
[INFO] [stdout] 69 |       fn probability(&self, symbol: &Self::Symbol) -> Result<Range<Self::B>, Self::ValueError> {
[INFO] [stdout]    |  ______________________________________________________________________________________________^
[INFO] [stdout] 70 | |         Ok(self.scale(*symbol)..self.scale(*symbol) + 1)
[INFO] [stdout] 71 | |     }
[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<std::ops::Range<u128>, !>
[INFO] [stdout]   --> src/float.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |         Ok(self.scale(*symbol)..self.scale(*symbol) + 1)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u128>, !>
[INFO] [stdout]    --> src/float.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |         model.probability(&input).unwrap()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u128>, !>
[INFO] [stdout]    --> src/float.rs:147:20
[INFO] [stdout]     |
[INFO] [stdout] 147 |         assert_eq!(model.probability(&2.0).unwrap(), 100_020..100_021);
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u128>, !>
[INFO] [stdout]   --> src/impls/one_shot.rs:13:94
[INFO] [stdout]    |
[INFO] [stdout] 13 |       fn probability(&self, symbol: &Self::Symbol) -> Result<Range<Self::B>, Self::ValueError> {
[INFO] [stdout]    |  ______________________________________________________________________________________________^
[INFO] [stdout] 14 | |         Ok((*symbol).into()..(symbol + 1).into())
[INFO] [stdout] 15 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u128>, !>
[INFO] [stdout]   --> src/impls/one_shot.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Ok((*symbol).into()..(symbol + 1).into())
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `minnow` (lib test) due to 6 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "97f215d62fb2d0fc0a6ca4988097951cdcb1fdc9fb7581cc22072bacf5832174", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97f215d62fb2d0fc0a6ca4988097951cdcb1fdc9fb7581cc22072bacf5832174", kill_on_drop: false }`
[INFO] [stdout] 97f215d62fb2d0fc0a6ca4988097951cdcb1fdc9fb7581cc22072bacf5832174
