[INFO] cloning repository https://github.com/SomeoneWeird/lingua-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SomeoneWeird/lingua-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSomeoneWeird%2Flingua-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSomeoneWeird%2Flingua-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0b4c664e86e3e75d3a0725ed9e37e4b508b07cab
[INFO] checking SomeoneWeird/lingua-rs against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSomeoneWeird%2Flingua-rs" "/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/SomeoneWeird/lingua-rs
[INFO] finished tweaking git repo https://github.com/SomeoneWeird/lingua-rs
[INFO] tweaked toml for git repo https://github.com/SomeoneWeird/lingua-rs written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/SomeoneWeird/lingua-rs on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/SomeoneWeird/lingua-rs 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1084be40055e701b89ec2d0d5ebb3835f78fb798496c2d867c009d9c8e4b5b40
[INFO] running `Command { std: "docker" "start" "-a" "1084be40055e701b89ec2d0d5ebb3835f78fb798496c2d867c009d9c8e4b5b40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1084be40055e701b89ec2d0d5ebb3835f78fb798496c2d867c009d9c8e4b5b40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1084be40055e701b89ec2d0d5ebb3835f78fb798496c2d867c009d9c8e4b5b40", kill_on_drop: false }`
[INFO] [stdout] 1084be40055e701b89ec2d0d5ebb3835f78fb798496c2d867c009d9c8e4b5b40
[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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f675a16eaf82515b8c0af1492d7f9392131bde5e89ba4f6b38f66a8b87218e31
[INFO] running `Command { std: "docker" "start" "-a" "f675a16eaf82515b8c0af1492d7f9392131bde5e89ba4f6b38f66a8b87218e31", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking lingua-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `body` is never read
[INFO] [stdout]  --> src/ast/mod.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct ProgramOpts {
[INFO] [stdout]   |            ----------- field in this struct
[INFO] [stdout] 5 |   body: Vec<Node>
[INFO] [stdout]   |   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ProgramOpts` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/ast/mod.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct ValueOpts {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 10 |   value: String
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ValueOpts` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `type` and `name` are never read
[INFO] [stdout]   --> src/ast/mod.rs:15:3
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct DefinitionOpts {
[INFO] [stdout]    |            -------------- fields in this struct
[INFO] [stdout] 15 |   r#type: String,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout] 16 |   name: String
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `DefinitionOpts` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/ast/mod.rs:21:3
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct ReturnOpts {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 21 |   value: Box<Option<Node>>
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ReturnOpts` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `value` are never read
[INFO] [stdout]   --> src/ast/mod.rs:26:3
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct AssignmentOpts {
[INFO] [stdout]    |            -------------- fields in this struct
[INFO] [stdout] 26 |   name: String,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] 27 |   value: Box<Node>
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AssignmentOpts` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `body` is never read
[INFO] [stdout]  --> src/ast/mod.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct ProgramOpts {
[INFO] [stdout]   |            ----------- field in this struct
[INFO] [stdout] 5 |   body: Vec<Node>
[INFO] [stdout]   |   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ProgramOpts` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/ast/mod.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct ValueOpts {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 10 |   value: String
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ValueOpts` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `type` and `name` are never read
[INFO] [stdout]   --> src/ast/mod.rs:15:3
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct DefinitionOpts {
[INFO] [stdout]    |            -------------- fields in this struct
[INFO] [stdout] 15 |   r#type: String,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout] 16 |   name: String
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `DefinitionOpts` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/ast/mod.rs:21:3
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct ReturnOpts {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 21 |   value: Box<Option<Node>>
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ReturnOpts` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `value` are never read
[INFO] [stdout]   --> src/ast/mod.rs:26:3
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct AssignmentOpts {
[INFO] [stdout]    |            -------------- fields in this struct
[INFO] [stdout] 26 |   name: String,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] 27 |   value: Box<Node>
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AssignmentOpts` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:32:11
[INFO] [stdout]    |
[INFO] [stdout] 32 |   Program(ProgramOpts),
[INFO] [stdout]    |   ------- ^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 32 -   Program(ProgramOpts),
[INFO] [stdout] 32 +   Program(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 |   Definition(DefinitionOpts),
[INFO] [stdout]    |   ---------- ^^^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 33 -   Definition(DefinitionOpts),
[INFO] [stdout] 33 +   Definition(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:34:11
[INFO] [stdout]    |
[INFO] [stdout] 34 |   Literal(ValueOpts),
[INFO] [stdout]    |   ------- ^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 34 -   Literal(ValueOpts),
[INFO] [stdout] 34 +   Literal(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |   StringLiteral(ValueOpts),
[INFO] [stdout]    |   ------------- ^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 35 -   StringLiteral(ValueOpts),
[INFO] [stdout] 35 +   StringLiteral(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:36:10
[INFO] [stdout]    |
[INFO] [stdout] 36 |   Return(ReturnOpts),
[INFO] [stdout]    |   ------ ^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 36 -   Return(ReturnOpts),
[INFO] [stdout] 36 +   Return(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:37:14
[INFO] [stdout]    |
[INFO] [stdout] 37 |   Assignment(AssignmentOpts)
[INFO] [stdout]    |   ---------- ^^^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 37 -   Assignment(AssignmentOpts)
[INFO] [stdout] 37 +   Assignment(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/ast/mod.rs:153:24
[INFO] [stdout]     |
[INFO] [stdout] 153 |       Err(e) => panic!(e)
[INFO] [stdout]     |                        ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 153 |       Err(e) => panic!("{}", e)
[INFO] [stdout]     |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:32:11
[INFO] [stdout]    |
[INFO] [stdout] 32 |   Program(ProgramOpts),
[INFO] [stdout]    |   ------- ^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 32 -   Program(ProgramOpts),
[INFO] [stdout] 32 +   Program(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 |   Definition(DefinitionOpts),
[INFO] [stdout]    |   ---------- ^^^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 33 -   Definition(DefinitionOpts),
[INFO] [stdout] 33 +   Definition(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:34:11
[INFO] [stdout]    |
[INFO] [stdout] 34 |   Literal(ValueOpts),
[INFO] [stdout]    |   ------- ^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 34 -   Literal(ValueOpts),
[INFO] [stdout] 34 +   Literal(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |   StringLiteral(ValueOpts),
[INFO] [stdout]    |   ------------- ^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 35 -   StringLiteral(ValueOpts),
[INFO] [stdout] 35 +   StringLiteral(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:36:10
[INFO] [stdout]    |
[INFO] [stdout] 36 |   Return(ReturnOpts),
[INFO] [stdout]    |   ------ ^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 36 -   Return(ReturnOpts),
[INFO] [stdout] 36 +   Return(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:37:14
[INFO] [stdout]    |
[INFO] [stdout] 37 |   Assignment(AssignmentOpts)
[INFO] [stdout]    |   ---------- ^^^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 37 -   Assignment(AssignmentOpts)
[INFO] [stdout] 37 +   Assignment(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/ast/mod.rs:153:24
[INFO] [stdout]     |
[INFO] [stdout] 153 |       Err(e) => panic!(e)
[INFO] [stdout]     |                        ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 153 |       Err(e) => panic!("{}", e)
[INFO] [stdout]     |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.59s
[INFO] running `Command { std: "docker" "inspect" "f675a16eaf82515b8c0af1492d7f9392131bde5e89ba4f6b38f66a8b87218e31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f675a16eaf82515b8c0af1492d7f9392131bde5e89ba4f6b38f66a8b87218e31", kill_on_drop: false }`
[INFO] [stdout] f675a16eaf82515b8c0af1492d7f9392131bde5e89ba4f6b38f66a8b87218e31
