[INFO] cloning repository https://github.com/1inguini/huffman
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/1inguini/huffman" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1inguini%2Fhuffman", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1inguini%2Fhuffman'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6f9311c16910cedb1bafb045e242b1689a62e000
[INFO] testing 1inguini/huffman against master#1ef7943ee607160a564655b6596f83670ef95df5 for pr-146098-6
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1inguini%2Fhuffman" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/1inguini/huffman
[INFO] finished tweaking git repo https://github.com/1inguini/huffman
[INFO] tweaked toml for git repo https://github.com/1inguini/huffman written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/1inguini/huffman on toolchain 1ef7943ee607160a564655b6596f83670ef95df5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/1inguini/huffman 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" "+1ef7943ee607160a564655b6596f83670ef95df5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap_derive v3.1.2
[INFO] [stderr]   Downloaded textwrap v0.14.2
[INFO] [stderr]   Downloaded bitvec v1.0.0
[INFO] [stderr]   Downloaded clap v3.1.2
[INFO] [stderr]   Downloaded libc v0.2.119
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 994526fada17b79bb1c08b1aa30bdf662266aa9eea4a22e6b9742b23759169a6
[INFO] running `Command { std: "docker" "start" "-a" "994526fada17b79bb1c08b1aa30bdf662266aa9eea4a22e6b9742b23759169a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "994526fada17b79bb1c08b1aa30bdf662266aa9eea4a22e6b9742b23759169a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "994526fada17b79bb1c08b1aa30bdf662266aa9eea4a22e6b9742b23759169a6", kill_on_drop: false }`
[INFO] [stdout] 994526fada17b79bb1c08b1aa30bdf662266aa9eea4a22e6b9742b23759169a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "-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" "+1ef7943ee607160a564655b6596f83670ef95df5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9bcb0d8fdd2108399c5896c4546b39e2d230fbb9ff67fc9d8c85f1d0c8533a9
[INFO] running `Command { std: "docker" "start" "-a" "f9bcb0d8fdd2108399c5896c4546b39e2d230fbb9ff67fc9d8c85f1d0c8533a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling textwrap v0.14.2
[INFO] [stderr]    Compiling funty v2.0.0
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling wyz v0.5.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling bitvec v1.0.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.1.2
[INFO] [stderr]    Compiling clap v3.1.2
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::util`
[INFO] [stdout]    --> src/main.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 136 |     use crate::util;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ptr::BitRef`
[INFO] [stdout]    --> src/main.rs:137:18
[INFO] [stdout]     |
[INFO] [stdout] 137 |     use bitvec::{ptr::BitRef, slice::BitSlice, vec::BitVec};
[INFO] [stdout]     |                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter`
[INFO] [stdout]    --> src/main.rs:138:27
[INFO] [stdout]     |
[INFO] [stdout] 138 |     use std::{fmt::Debug, iter, mem, ops::Index};
[INFO] [stdout]     |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `collections::HashMap`, `fmt::Display`, and `marker::PhantomData`
[INFO] [stdout]    --> src/main.rs:635:5
[INFO] [stdout]     |
[INFO] [stdout] 635 |     collections::HashMap,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 636 |     fmt::Display,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 639 |     marker::PhantomData,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:94:17
[INFO] [stdout]    |
[INFO] [stdout] 94 |     Unreachable(&'static str),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 94 -     Unreachable(&'static str),
[INFO] [stdout] 94 +     Unreachable(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:97:8
[INFO] [stdout]    |
[INFO] [stdout] 97 |     Io(io::Error),
[INFO] [stdout]    |     -- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 97 -     Io(io::Error),
[INFO] [stdout] 97 +     Io(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:103:27
[INFO] [stdout]     |
[INFO] [stdout] 103 |     InvalidCodeDefinition(Vec<IsAt<CodeDefinitionError>>),
[INFO] [stdout]     |     --------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 103 -     InvalidCodeDefinition(Vec<IsAt<CodeDefinitionError>>),
[INFO] [stdout] 103 +     InvalidCodeDefinition(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:106:23
[INFO] [stdout]     |
[INFO] [stdout] 106 |     InvalidCodeString(IsAt<CodeStringError>),
[INFO] [stdout]     |     ----------------- ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 106 -     InvalidCodeString(IsAt<CodeStringError>),
[INFO] [stdout] 106 +     InvalidCodeString(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:121:29
[INFO] [stdout]     |
[INFO] [stdout] 121 |     InsufficientDefinitions(Vec<BitVec>),
[INFO] [stdout]     |     ----------------------- ^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CodeDefinitionError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 121 -     InsufficientDefinitions(Vec<BitVec>),
[INFO] [stdout] 121 +     InsufficientDefinitions(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:123:17
[INFO] [stdout]     |
[INFO] [stdout] 123 |     InvalidCode(CodeStringError),
[INFO] [stdout]     |     ----------- ^^^^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CodeDefinitionError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 123 -     InvalidCode(CodeStringError),
[INFO] [stdout] 123 +     InvalidCode(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `DuplicateCodes` is never constructed
[INFO] [stdout]    --> src/main.rs:118:5
[INFO] [stdout]     |
[INFO] [stdout] 110 | enum CodeDefinitionError {
[INFO] [stdout]     |      ------------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 118 |     DuplicateCodes,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CodeDefinitionError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/main.rs:34:16
[INFO] [stdout]    |
[INFO] [stdout] 33 |     impl<T> Wrap<T> {
[INFO] [stdout]    |     --------------- associated function in this implementation
[INFO] [stdout] 34 |         pub fn new(inner: T) -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `line` and `character` are never read
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub struct IsAt<T> {
[INFO] [stdout]    |                ---- fields in this struct
[INFO] [stdout] 58 |         /// number of lines from the top
[INFO] [stdout] 59 |         pub line: usize,
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 60 |         /// number of character from the left
[INFO] [stdout] 61 |         pub character: usize,
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IsAt` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `extend`, `encode`, and `encode_sequence` are never used
[INFO] [stdout]    --> src/main.rs:148:16
[INFO] [stdout]     |
[INFO] [stdout] 144 | /     impl<Symbol> Tree<Symbol>
[INFO] [stdout] 145 | |     where
[INFO] [stdout] 146 | |         Symbol: Ord,
[INFO] [stdout]     | |____________________- associated items in this implementation
[INFO] [stdout] 147 |       {
[INFO] [stdout] 148 |           pub fn new(symbol: Symbol) -> Self {
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 154 |           pub fn extend(zero: Self, one: Self) -> Self {
[INFO] [stdout]     |                  ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 163 |           pub fn encode(&self, symbol: &Symbol) -> Option<BitVec> {
[INFO] [stdout]     |                  ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 168 |           pub fn encode_sequence(
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.60s
[INFO] running `Command { std: "docker" "inspect" "f9bcb0d8fdd2108399c5896c4546b39e2d230fbb9ff67fc9d8c85f1d0c8533a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9bcb0d8fdd2108399c5896c4546b39e2d230fbb9ff67fc9d8c85f1d0c8533a9", kill_on_drop: false }`
[INFO] [stdout] f9bcb0d8fdd2108399c5896c4546b39e2d230fbb9ff67fc9d8c85f1d0c8533a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "-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" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a010c94fc8f33012e2c7062e6216a8a2d394e9ecd607cabc3b9584dad9163a45
[INFO] running `Command { std: "docker" "start" "-a" "a010c94fc8f33012e2c7062e6216a8a2d394e9ecd607cabc3b9584dad9163a45", kill_on_drop: false }`
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::util`
[INFO] [stdout]    --> src/main.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 136 |     use crate::util;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ptr::BitRef`
[INFO] [stdout]    --> src/main.rs:137:18
[INFO] [stdout]     |
[INFO] [stdout] 137 |     use bitvec::{ptr::BitRef, slice::BitSlice, vec::BitVec};
[INFO] [stdout]     |                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter`
[INFO] [stdout]    --> src/main.rs:138:27
[INFO] [stdout]     |
[INFO] [stdout] 138 |     use std::{fmt::Debug, iter, mem, ops::Index};
[INFO] [stdout]     |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `collections::HashMap`, `fmt::Display`, and `marker::PhantomData`
[INFO] [stdout]    --> src/main.rs:635:5
[INFO] [stdout]     |
[INFO] [stdout] 635 |     collections::HashMap,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 636 |     fmt::Display,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 639 |     marker::PhantomData,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:94:17
[INFO] [stdout]    |
[INFO] [stdout] 94 |     Unreachable(&'static str),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 94 -     Unreachable(&'static str),
[INFO] [stdout] 94 +     Unreachable(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:97:8
[INFO] [stdout]    |
[INFO] [stdout] 97 |     Io(io::Error),
[INFO] [stdout]    |     -- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 97 -     Io(io::Error),
[INFO] [stdout] 97 +     Io(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:103:27
[INFO] [stdout]     |
[INFO] [stdout] 103 |     InvalidCodeDefinition(Vec<IsAt<CodeDefinitionError>>),
[INFO] [stdout]     |     --------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 103 -     InvalidCodeDefinition(Vec<IsAt<CodeDefinitionError>>),
[INFO] [stdout] 103 +     InvalidCodeDefinition(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:106:23
[INFO] [stdout]     |
[INFO] [stdout] 106 |     InvalidCodeString(IsAt<CodeStringError>),
[INFO] [stdout]     |     ----------------- ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 106 -     InvalidCodeString(IsAt<CodeStringError>),
[INFO] [stdout] 106 +     InvalidCodeString(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:121:29
[INFO] [stdout]     |
[INFO] [stdout] 121 |     InsufficientDefinitions(Vec<BitVec>),
[INFO] [stdout]     |     ----------------------- ^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CodeDefinitionError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 121 -     InsufficientDefinitions(Vec<BitVec>),
[INFO] [stdout] 121 +     InsufficientDefinitions(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:123:17
[INFO] [stdout]     |
[INFO] [stdout] 123 |     InvalidCode(CodeStringError),
[INFO] [stdout]     |     ----------- ^^^^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CodeDefinitionError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 123 -     InvalidCode(CodeStringError),
[INFO] [stdout] 123 +     InvalidCode(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `DuplicateCodes` is never constructed
[INFO] [stdout]    --> src/main.rs:118:5
[INFO] [stdout]     |
[INFO] [stdout] 110 | enum CodeDefinitionError {
[INFO] [stdout]     |      ------------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 118 |     DuplicateCodes,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CodeDefinitionError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/main.rs:34:16
[INFO] [stdout]    |
[INFO] [stdout] 33 |     impl<T> Wrap<T> {
[INFO] [stdout]    |     --------------- associated function in this implementation
[INFO] [stdout] 34 |         pub fn new(inner: T) -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `line` and `character` are never read
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub struct IsAt<T> {
[INFO] [stdout]    |                ---- fields in this struct
[INFO] [stdout] 58 |         /// number of lines from the top
[INFO] [stdout] 59 |         pub line: usize,
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 60 |         /// number of character from the left
[INFO] [stdout] 61 |         pub character: usize,
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IsAt` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `extend`, `encode`, and `encode_sequence` are never used
[INFO] [stdout]    --> src/main.rs:148:16
[INFO] [stdout]     |
[INFO] [stdout] 144 | /     impl<Symbol> Tree<Symbol>
[INFO] [stdout] 145 | |     where
[INFO] [stdout] 146 | |         Symbol: Ord,
[INFO] [stdout]     | |____________________- associated items in this implementation
[INFO] [stdout] 147 |       {
[INFO] [stdout] 148 |           pub fn new(symbol: Symbol) -> Self {
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 154 |           pub fn extend(zero: Self, one: Self) -> Self {
[INFO] [stdout]     |                  ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 163 |           pub fn encode(&self, symbol: &Symbol) -> Option<BitVec> {
[INFO] [stdout]     |                  ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 168 |           pub fn encode_sequence(
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "a010c94fc8f33012e2c7062e6216a8a2d394e9ecd607cabc3b9584dad9163a45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a010c94fc8f33012e2c7062e6216a8a2d394e9ecd607cabc3b9584dad9163a45", kill_on_drop: false }`
[INFO] [stdout] a010c94fc8f33012e2c7062e6216a8a2d394e9ecd607cabc3b9584dad9163a45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "-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" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a6b82caf7c0b21cf72c0935ad021627c51a5081de2151f165ff380bc66b86bf7
[INFO] running `Command { std: "docker" "start" "-a" "a6b82caf7c0b21cf72c0935ad021627c51a5081de2151f165ff380bc66b86bf7", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `crate::util`
[INFO] [stderr]    --> src/main.rs:136:9
[INFO] [stderr]     |
[INFO] [stderr] 136 |     use crate::util;
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ptr::BitRef`
[INFO] [stderr]    --> src/main.rs:137:18
[INFO] [stderr]     |
[INFO] [stderr] 137 |     use bitvec::{ptr::BitRef, slice::BitSlice, vec::BitVec};
[INFO] [stderr]     |                  ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `iter`
[INFO] [stderr]    --> src/main.rs:138:27
[INFO] [stderr]     |
[INFO] [stderr] 138 |     use std::{fmt::Debug, iter, mem, ops::Index};
[INFO] [stderr]     |                           ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `collections::HashMap`, `fmt::Display`, and `marker::PhantomData`
[INFO] [stderr]    --> src/main.rs:635:5
[INFO] [stderr]     |
[INFO] [stderr] 635 |     collections::HashMap,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 636 |     fmt::Display,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 639 |     marker::PhantomData,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/main.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 |     Unreachable(&'static str),
[INFO] [stderr]    |     ----------- ^^^^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 94 -     Unreachable(&'static str),
[INFO] [stderr] 94 +     Unreachable(()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/main.rs:97:8
[INFO] [stderr]    |
[INFO] [stderr] 97 |     Io(io::Error),
[INFO] [stderr]    |     -- ^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 97 -     Io(io::Error),
[INFO] [stderr] 97 +     Io(()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]    --> src/main.rs:103:27
[INFO] [stderr]     |
[INFO] [stderr] 103 |     InvalidCodeDefinition(Vec<IsAt<CodeDefinitionError>>),
[INFO] [stderr]     |     --------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |     |
[INFO] [stderr]     |     field in this variant
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]     |
[INFO] [stderr] 103 -     InvalidCodeDefinition(Vec<IsAt<CodeDefinitionError>>),
[INFO] [stderr] 103 +     InvalidCodeDefinition(()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]    --> src/main.rs:106:23
[INFO] [stderr]     |
[INFO] [stderr] 106 |     InvalidCodeString(IsAt<CodeStringError>),
[INFO] [stderr]     |     ----------------- ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |     |
[INFO] [stderr]     |     field in this variant
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]     |
[INFO] [stderr] 106 -     InvalidCodeString(IsAt<CodeStringError>),
[INFO] [stderr] 106 +     InvalidCodeString(()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]    --> src/main.rs:121:29
[INFO] [stderr]     |
[INFO] [stderr] 121 |     InsufficientDefinitions(Vec<BitVec>),
[INFO] [stderr]     |     ----------------------- ^^^^^^^^^^^
[INFO] [stderr]     |     |
[INFO] [stderr]     |     field in this variant
[INFO] [stderr]     |
[INFO] [stderr]     = note: `CodeDefinitionError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]     |
[INFO] [stderr] 121 -     InsufficientDefinitions(Vec<BitVec>),
[INFO] [stderr] 121 +     InsufficientDefinitions(()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]    --> src/main.rs:123:17
[INFO] [stderr]     |
[INFO] [stderr] 123 |     InvalidCode(CodeStringError),
[INFO] [stderr]     |     ----------- ^^^^^^^^^^^^^^^
[INFO] [stderr]     |     |
[INFO] [stderr]     |     field in this variant
[INFO] [stderr]     |
[INFO] [stderr]     = note: `CodeDefinitionError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]     |
[INFO] [stderr] 123 -     InvalidCode(CodeStringError),
[INFO] [stderr] 123 +     InvalidCode(()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: variant `DuplicateCodes` is never constructed
[INFO] [stderr]    --> src/main.rs:118:5
[INFO] [stderr]     |
[INFO] [stderr] 110 | enum CodeDefinitionError {
[INFO] [stderr]     |      ------------------- variant in this enum
[INFO] [stderr] ...
[INFO] [stderr] 118 |     DuplicateCodes,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `CodeDefinitionError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/main.rs:34:16
[INFO] [stderr]    |
[INFO] [stderr] 33 |     impl<T> Wrap<T> {
[INFO] [stderr]    |     --------------- associated function in this implementation
[INFO] [stderr] 34 |         pub fn new(inner: T) -> Self {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `line` and `character` are never read
[INFO] [stderr]   --> src/main.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub struct IsAt<T> {
[INFO] [stderr]    |                ---- fields in this struct
[INFO] [stderr] 58 |         /// number of lines from the top
[INFO] [stderr] 59 |         pub line: usize,
[INFO] [stderr]    |             ^^^^
[INFO] [stderr] 60 |         /// number of character from the left
[INFO] [stderr] 61 |         pub character: usize,
[INFO] [stderr]    |             ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `IsAt` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `extend`, `encode`, and `encode_sequence` are never used
[INFO] [stderr]    --> src/main.rs:148:16
[INFO] [stderr]     |
[INFO] [stderr] 144 | /     impl<Symbol> Tree<Symbol>
[INFO] [stderr] 145 | |     where
[INFO] [stderr] 146 | |         Symbol: Ord,
[INFO] [stderr]     | |____________________- associated items in this implementation
[INFO] [stderr] 147 |       {
[INFO] [stderr] 148 |           pub fn new(symbol: Symbol) -> Self {
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] ...
[INFO] [stderr] 154 |           pub fn extend(zero: Self, one: Self) -> Self {
[INFO] [stderr]     |                  ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 163 |           pub fn encode(&self, symbol: &Symbol) -> Option<BitVec> {
[INFO] [stderr]     |                  ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 168 |           pub fn encode_sequence(
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `huffman` (bin "huffman" test) generated 14 warnings (run `cargo fix --bin "huffman" -p huffman --tests` to apply 4 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/huffman-5da96d04e8cdc1a6)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a6b82caf7c0b21cf72c0935ad021627c51a5081de2151f165ff380bc66b86bf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6b82caf7c0b21cf72c0935ad021627c51a5081de2151f165ff380bc66b86bf7", kill_on_drop: false }`
[INFO] [stdout] a6b82caf7c0b21cf72c0935ad021627c51a5081de2151f165ff380bc66b86bf7
