[INFO] fetching crate arithmetic-coding 0.4.0...
[INFO] checking arithmetic-coding-0.4.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate arithmetic-coding 0.4.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate arithmetic-coding 0.4.0
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate arithmetic-coding 0.4.0
[INFO] tweaked toml for crates.io crate arithmetic-coding 0.4.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate arithmetic-coding 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 arithmetic-coding 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-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] dbea12482cc9ae913db1675bd7ab41447ea229e392fd340ace13c311c1f5e86a
[INFO] running `Command { std: "docker" "start" "-a" "dbea12482cc9ae913db1675bd7ab41447ea229e392fd340ace13c311c1f5e86a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbea12482cc9ae913db1675bd7ab41447ea229e392fd340ace13c311c1f5e86a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbea12482cc9ae913db1675bd7ab41447ea229e392fd340ace13c311c1f5e86a", kill_on_drop: false }`
[INFO] [stdout] dbea12482cc9ae913db1675bd7ab41447ea229e392fd340ace13c311c1f5e86a
[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] 54caec9a0572f353a775eebd2dfd3eae69eaf9450dd1c0c120e4338caa0f3003
[INFO] running `Command { std: "docker" "start" "-a" "54caec9a0572f353a775eebd2dfd3eae69eaf9450dd1c0c120e4338caa0f3003", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.214
[INFO] [stderr]    Compiling thiserror v1.0.65
[INFO] [stderr]    Compiling libc v0.2.161
[INFO] [stderr]    Compiling serde_json v1.0.132
[INFO] [stderr]     Checking clap_lex v0.7.2
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking half v2.4.1
[INFO] [stderr]     Checking anstyle v1.0.9
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking regex-automata v0.4.8
[INFO] [stderr]    Compiling syn v2.0.85
[INFO] [stderr]     Checking fenwick v2.0.1
[INFO] [stderr]     Checking oorandom v11.1.4
[INFO] [stderr]     Checking bitstream-io v2.5.3
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking ciborium-ll v0.2.2
[INFO] [stderr]     Checking clap_builder v4.5.20
[INFO] [stderr]     Checking is-terminal v0.4.13
[INFO] [stderr]     Checking plotters v0.3.7
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]     Checking clap v4.5.20
[INFO] [stderr]    Compiling test-case-core v3.3.1
[INFO] [stderr]    Compiling serde_derive v1.0.214
[INFO] [stderr]    Compiling thiserror-impl v1.0.65
[INFO] [stderr]    Compiling test-case-macros v3.3.1
[INFO] [stderr]     Checking test-case v3.3.1
[INFO] [stderr]     Checking arithmetic-coding-core v0.4.0
[INFO] [stderr]     Checking fenwick-model v0.1.0
[INFO] [stderr]     Checking arithmetic-coding v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/decoder.rs:105:23
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn decode_all(&mut self) -> DecodeIter<M, R> {
[INFO] [stdout]     |                       ^^^^^^^^^     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn decode_all(&mut self) -> DecodeIter<'_, M, R> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> examples/fixed_length.rs:22:90
[INFO] [stdout]    |
[INFO] [stdout] 22 |       fn probability(&self, symbol: &Self::Symbol) -> Result<Range<u32>, Self::ValueError> {
[INFO] [stdout]    |  __________________________________________________________________________________________^
[INFO] [stdout] 23 | |         match symbol {
[INFO] [stdout] 24 | |             Symbol::A => Ok(0..1),
[INFO] [stdout] 25 | |             Symbol::B => Ok(1..2),
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |     }
[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<u32>, Infallible>
[INFO] [stdout]   --> examples/fixed_length.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | /         match symbol {
[INFO] [stdout] 24 | |             Symbol::A => Ok(0..1),
[INFO] [stdout] 25 | |             Symbol::B => Ok(1..2),
[INFO] [stdout] 26 | |             Symbol::C => Ok(2..3),
[INFO] [stdout] 27 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> examples/fixed_length.rs:24:26
[INFO] [stdout]    |
[INFO] [stdout] 24 |             Symbol::A => Ok(0..1),
[INFO] [stdout]    |                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> examples/fixed_length.rs:25:26
[INFO] [stdout]    |
[INFO] [stdout] 25 |             Symbol::B => Ok(1..2),
[INFO] [stdout]    |                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> examples/fixed_length.rs:26:26
[INFO] [stdout]    |
[INFO] [stdout] 26 |             Symbol::C => Ok(2..3),
[INFO] [stdout]    |                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arithmetic-coding` (example "fixed_length") due to 5 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<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> examples/symbolic.rs:22:92
[INFO] [stdout]    |
[INFO] [stdout] 22 |       fn probability(&self, symbol: Option<&Self::Symbol>) -> Result<Range<u32>, Infallible> {
[INFO] [stdout]    |  ____________________________________________________________________________________________^
[INFO] [stdout] 23 | |         Ok(match symbol {
[INFO] [stdout] 24 | |             None => 0..1,
[INFO] [stdout] 25 | |             Some(&Symbol::A) => 1..2,
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |         })
[INFO] [stdout] 29 | |     }
[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<u32>, Infallible>
[INFO] [stdout]   --> examples/symbolic.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | /         Ok(match symbol {
[INFO] [stdout] 24 | |             None => 0..1,
[INFO] [stdout] 25 | |             Some(&Symbol::A) => 1..2,
[INFO] [stdout] 26 | |             Some(&Symbol::B) => 2..3,
[INFO] [stdout] 27 | |             Some(&Symbol::C) => 3..4,
[INFO] [stdout] 28 | |         })
[INFO] [stdout]    | |__________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arithmetic-coding` (example "symbolic") due to 2 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> examples/max_length.rs:22:98
[INFO] [stdout]    |
[INFO] [stdout] 22 |       fn probability(&self, symbol: Option<&Self::Symbol>) -> Result<Range<u32>, Self::ValueError> {
[INFO] [stdout]    |  __________________________________________________________________________________________________^
[INFO] [stdout] 23 | |         match symbol {
[INFO] [stdout] 24 | |             Some(Symbol::A) => Ok(0..1),
[INFO] [stdout] 25 | |             Some(Symbol::B) => Ok(1..2),
[INFO] [stdout] ...  |
[INFO] [stdout] 29 | |     }
[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<u32>, Infallible>
[INFO] [stdout]   --> examples/max_length.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | /         match symbol {
[INFO] [stdout] 24 | |             Some(Symbol::A) => Ok(0..1),
[INFO] [stdout] 25 | |             Some(Symbol::B) => Ok(1..2),
[INFO] [stdout] 26 | |             Some(Symbol::C) => Ok(2..3),
[INFO] [stdout] 27 | |             None => Ok(3..4),
[INFO] [stdout] 28 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> examples/max_length.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 |             Some(Symbol::A) => Ok(0..1),
[INFO] [stdout]    |                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> examples/max_length.rs:25:32
[INFO] [stdout]    |
[INFO] [stdout] 25 |             Some(Symbol::B) => Ok(1..2),
[INFO] [stdout]    |                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> examples/max_length.rs:26:32
[INFO] [stdout]    |
[INFO] [stdout] 26 |             Some(Symbol::C) => Ok(2..3),
[INFO] [stdout]    |                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> examples/max_length.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout] 27 |             None => Ok(3..4),
[INFO] [stdout]    |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/decoder.rs:105:23
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn decode_all(&mut self) -> DecodeIter<M, R> {
[INFO] [stdout]     |                       ^^^^^^^^^     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn decode_all(&mut self) -> DecodeIter<'_, M, R> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> examples/concatenated.rs:64:96
[INFO] [stdout]    |
[INFO] [stdout] 64 |           fn probability(&self, symbol: Option<&Self::Symbol>) -> Result<Range<u32>, Infallible> {
[INFO] [stdout]    |  ________________________________________________________________________________________________^
[INFO] [stdout] 65 | |             Ok(match symbol {
[INFO] [stdout] 66 | |                 None => 0..1,
[INFO] [stdout] 67 | |                 Some(&Symbol::A) => 1..2,
[INFO] [stdout] ...  |
[INFO] [stdout] 70 | |             })
[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<u32>, Infallible>
[INFO] [stdout]   --> examples/concatenated.rs:65:13
[INFO] [stdout]    |
[INFO] [stdout] 65 | /             Ok(match symbol {
[INFO] [stdout] 66 | |                 None => 0..1,
[INFO] [stdout] 67 | |                 Some(&Symbol::A) => 1..2,
[INFO] [stdout] 68 | |                 Some(&Symbol::B) => 2..3,
[INFO] [stdout] 69 | |                 Some(&Symbol::C) => 3..4,
[INFO] [stdout] 70 | |             })
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arithmetic-coding` (example "max_length") due to 6 previous errors
[INFO] [stderr] error: could not compile `arithmetic-coding` (example "concatenated") due to 2 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> tests/fixed_length.rs:22:90
[INFO] [stdout]    |
[INFO] [stdout] 22 |       fn probability(&self, symbol: &Self::Symbol) -> Result<Range<u32>, Self::ValueError> {
[INFO] [stdout]    |  __________________________________________________________________________________________^
[INFO] [stdout] 23 | |         match symbol {
[INFO] [stdout] 24 | |             Symbol::A => Ok(0..1),
[INFO] [stdout] 25 | |             Symbol::B => Ok(1..2),
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |     }
[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<u32>, Infallible>
[INFO] [stdout]   --> tests/fixed_length.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | /         match symbol {
[INFO] [stdout] 24 | |             Symbol::A => Ok(0..1),
[INFO] [stdout] 25 | |             Symbol::B => Ok(1..2),
[INFO] [stdout] 26 | |             Symbol::C => Ok(2..3),
[INFO] [stdout] 27 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> tests/fixed_length.rs:24:26
[INFO] [stdout]    |
[INFO] [stdout] 24 |             Symbol::A => Ok(0..1),
[INFO] [stdout]    |                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> tests/fixed_length.rs:25:26
[INFO] [stdout]    |
[INFO] [stdout] 25 |             Symbol::B => Ok(1..2),
[INFO] [stdout]    |                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> tests/fixed_length.rs:26:26
[INFO] [stdout]    |
[INFO] [stdout] 26 |             Symbol::C => Ok(2..3),
[INFO] [stdout]    |                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> tests/max_length.rs:23:98
[INFO] [stdout]    |
[INFO] [stdout] 23 |       fn probability(&self, symbol: Option<&Self::Symbol>) -> Result<Range<u32>, Self::ValueError> {
[INFO] [stdout]    |  __________________________________________________________________________________________________^
[INFO] [stdout] 24 | |         match symbol {
[INFO] [stdout] 25 | |             Some(Symbol::A) => Ok(0..1),
[INFO] [stdout] 26 | |             Some(Symbol::B) => Ok(1..2),
[INFO] [stdout] ...  |
[INFO] [stdout] 30 | |     }
[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<u32>, Infallible>
[INFO] [stdout]   --> tests/max_length.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | /         match symbol {
[INFO] [stdout] 25 | |             Some(Symbol::A) => Ok(0..1),
[INFO] [stdout] 26 | |             Some(Symbol::B) => Ok(1..2),
[INFO] [stdout] 27 | |             Some(Symbol::C) => Ok(2..3),
[INFO] [stdout] 28 | |             None => Ok(3..4),
[INFO] [stdout] 29 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> tests/max_length.rs:25:32
[INFO] [stdout]    |
[INFO] [stdout] 25 |             Some(Symbol::A) => Ok(0..1),
[INFO] [stdout]    |                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> tests/max_length.rs:26:32
[INFO] [stdout]    |
[INFO] [stdout] 26 |             Some(Symbol::B) => Ok(1..2),
[INFO] [stdout]    |                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> tests/max_length.rs:27:32
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Some(Symbol::C) => Ok(2..3),
[INFO] [stdout]    |                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> tests/max_length.rs:28:21
[INFO] [stdout]    |
[INFO] [stdout] 28 |             None => Ok(3..4),
[INFO] [stdout]    |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::ops::Range<u32>, Infallible>
[INFO] [stdout]   --> tests/concatenated.rs:65:96
[INFO] [stdout]    |
[INFO] [stdout] 65 |           fn probability(&self, symbol: Option<&Self::Symbol>) -> Result<Range<u32>, Infallible> {
[INFO] [stdout]    |  ________________________________________________________________________________________________^
[INFO] [stdout] 66 | |             Ok(match symbol {
[INFO] [stdout] 67 | |                 None => 0..1,
[INFO] [stdout] 68 | |                 Some(&Symbol::A) => 1..2,
[INFO] [stdout] ...  |
[INFO] [stdout] 71 | |             })
[INFO] [stdout] 72 | |         }
[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<u32>, Infallible>
[INFO] [stdout]   --> tests/concatenated.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 | /             Ok(match symbol {
[INFO] [stdout] 67 | |                 None => 0..1,
[INFO] [stdout] 68 | |                 Some(&Symbol::A) => 1..2,
[INFO] [stdout] 69 | |                 Some(&Symbol::B) => 2..3,
[INFO] [stdout] 70 | |                 Some(&Symbol::C) => 3..4,
[INFO] [stdout] 71 | |             })
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arithmetic-coding` (test "max_length") due to 6 previous errors
[INFO] [stderr] error: could not compile `arithmetic-coding` (test "fixed_length") due to 5 previous errors
[INFO] [stderr] error: could not compile `arithmetic-coding` (test "concatenated") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "54caec9a0572f353a775eebd2dfd3eae69eaf9450dd1c0c120e4338caa0f3003", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54caec9a0572f353a775eebd2dfd3eae69eaf9450dd1c0c120e4338caa0f3003", kill_on_drop: false }`
[INFO] [stdout] 54caec9a0572f353a775eebd2dfd3eae69eaf9450dd1c0c120e4338caa0f3003
