[INFO] cloning repository https://github.com/yupferris/butterball
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yupferris/butterball" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyupferris%2Fbutterball", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyupferris%2Fbutterball'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a3d5876a03fe4a9a8db1f732060646ba9db9c281
[INFO] checking yupferris/butterball against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyupferris%2Fbutterball" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yupferris/butterball
[INFO] finished tweaking git repo https://github.com/yupferris/butterball
[INFO] tweaked toml for git repo https://github.com/yupferris/butterball written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yupferris/butterball 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 git repo https://github.com/yupferris/butterball 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] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 0e6d494ce1fccb3d00463979718970528ba2e9b491d93087db3bb105eb82903d
[INFO] running `Command { std: "docker" "start" "-a" "0e6d494ce1fccb3d00463979718970528ba2e9b491d93087db3bb105eb82903d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e6d494ce1fccb3d00463979718970528ba2e9b491d93087db3bb105eb82903d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e6d494ce1fccb3d00463979718970528ba2e9b491d93087db3bb105eb82903d", kill_on_drop: false }`
[INFO] [stdout] 0e6d494ce1fccb3d00463979718970528ba2e9b491d93087db3bb105eb82903d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 78970c976ce72de78a1f5dfde5b408ef6bb95d98ea86b51231a4669b568a7cb1
[INFO] running `Command { std: "docker" "start" "-a" "78970c976ce72de78a1f5dfde5b408ef6bb95d98ea86b51231a4669b568a7cb1", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking libc v0.2.5
[INFO] [stderr]     Checking winapi v0.2.5
[INFO] [stderr]    Compiling gcc v0.3.21
[INFO] [stderr]     Checking libc v0.1.12
[INFO] [stderr]     Checking nom v1.1.0
[INFO] [stderr]     Checking dylib v0.0.1
[INFO] [stderr]    Compiling kernel32-sys v0.2.1
[INFO] [stderr]     Checking x11-dl v2.2.1
[INFO] [stderr]     Checking time v0.1.34
[INFO] [stderr]    Compiling minifb v0.3.1
[INFO] [stderr]     Checking butterball v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:29:21
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let file_name = try!(get_file_name());
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let file = try!(read_file(&file_name));
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:35:15
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let ast = try!(parser::parse(&file));
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 66 |     try!(file.read_to_string(&mut ret));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:64:20
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let mut file = try!(File::open(file_name));
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:29:21
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let file_name = try!(get_file_name());
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let file = try!(read_file(&file_name));
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:35:15
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let ast = try!(parser::parse(&file));
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 66 |     try!(file.read_to_string(&mut ret));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:64:20
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let mut file = try!(File::open(file_name));
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/impls.rs:17:23
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub function: Box<Fn(&mut Context, &[Value]) -> Value>,
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub function: Box<dyn Fn(&mut Context, &[Value]) -> Value>,
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/impls.rs:17:23
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub function: Box<Fn(&mut Context, &[Value]) -> Value>,
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub function: Box<dyn Fn(&mut Context, &[Value]) -> Value>,
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/impls.rs:24:23
[INFO] [stdout]    |
[INFO] [stdout] 24 |         function: Box<Fn(&mut Context, &[Value]) -> Value>,
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 24 |         function: Box<dyn Fn(&mut Context, &[Value]) -> Value>,
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/impls.rs:24:23
[INFO] [stdout]    |
[INFO] [stdout] 24 |         function: Box<Fn(&mut Context, &[Value]) -> Value>,
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 24 |         function: Box<dyn Fn(&mut Context, &[Value]) -> Value>,
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:60:45
[INFO] [stdout]    |
[INFO] [stdout] 60 |     read_file_impl(file_name).map_err(|x| x.description().to_string())
[INFO] [stdout]    |                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:60:45
[INFO] [stdout]    |
[INFO] [stdout] 60 |     read_file_impl(file_name).map_err(|x| x.description().to_string())
[INFO] [stdout]    |                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/ast.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Include(String),
[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]   = 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] 9 -     Include(String),
[INFO] [stdout] 9 +     Include(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast.rs:10:14
[INFO] [stdout]    |
[INFO] [stdout] 10 |     TypeDecl(TypeDecl),
[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] 10 -     TypeDecl(TypeDecl),
[INFO] [stdout] 10 +     TypeDecl(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `fields` are never read
[INFO] [stdout]   --> src/ast.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct TypeDecl {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 22 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 23 |     pub fields: Vec<Field>
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TypeDecl` 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`, `type_specifier`, and `array_size` are never read
[INFO] [stdout]   --> src/ast.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Field {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 28 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 29 |     pub type_specifier: Option<TypeSpecifier>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 30 |     pub array_size: Option<i32>
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Field` 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.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     Custom(String)
[INFO] [stdout]    |     ------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TypeSpecifier` has derived impls for the traits `Clone` and `Debug`, but these are 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] 38 -     Custom(String)
[INFO] [stdout] 38 +     Custom(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `type_specifier` is never read
[INFO] [stdout]   --> src/ast.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub struct FunctionDecl {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] 64 |     pub name: String,
[INFO] [stdout] 65 |     pub type_specifier: Option<TypeSpecifier>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FunctionDecl` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `type_specifier` is never read
[INFO] [stdout]   --> src/ast.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub struct FunctionCallOrArrayElemRef {
[INFO] [stdout]    |            -------------------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 86 |     pub type_specifier: Option<TypeSpecifier>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FunctionCallOrArrayElemRef` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:146:12
[INFO] [stdout]     |
[INFO] [stdout] 146 |     Repeat(Repeat),
[INFO] [stdout]     |     ------ ^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Statement` has derived impls for the traits `Clone` and `Debug`, but these are 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] 146 -     Repeat(Repeat),
[INFO] [stdout] 146 +     Repeat(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:148:12
[INFO] [stdout]     |
[INFO] [stdout] 148 |     Select(Select),
[INFO] [stdout]     |     ------ ^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Statement` has derived impls for the traits `Clone` and `Debug`, but these are 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] 148 -     Select(Select),
[INFO] [stdout] 148 +     Select(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `body` is never read
[INFO] [stdout]    --> src/ast.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 177 | pub struct Repeat {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] 178 |     pub body: StatementList
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Repeat` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `expr` and `arms` are never read
[INFO] [stdout]    --> src/ast.rs:210:9
[INFO] [stdout]     |
[INFO] [stdout] 209 | pub struct Select {
[INFO] [stdout]     |            ------ fields in this struct
[INFO] [stdout] 210 |     pub expr: Box<Expr>,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 211 |     pub arms: Vec<CaseArm>
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Select` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `body` are never read
[INFO] [stdout]    --> src/ast.rs:216:9
[INFO] [stdout]     |
[INFO] [stdout] 215 | pub struct CaseArm {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] 216 |     pub value: Box<Expr>,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 217 |     pub body: StatementList
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaseArm` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `is_const` is never read
[INFO] [stdout]   --> src/il.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct SingleVariable {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 38 |     pub name: String,
[INFO] [stdout] 39 |     pub is_const: bool,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SingleVariable` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `locals` is never read
[INFO] [stdout]   --> src/il.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub struct Function {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 57 |     pub signature: FunctionSignature,
[INFO] [stdout] 58 |     pub locals: Vec<Variable>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Function` 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 `name` is never read
[INFO] [stdout]   --> src/il.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub struct FunctionSignature {
[INFO] [stdout]    |            ----------------- field in this struct
[INFO] [stdout] 65 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FunctionSignature` 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_type` is never read
[INFO] [stdout]   --> src/interpreter.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 96 | struct SingleVariable {
[INFO] [stdout]    |        -------------- field in this struct
[INFO] [stdout] 97 |     value: Value,
[INFO] [stdout] 98 |     value_type: ValueType
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SingleVariable` 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_type` is never read
[INFO] [stdout]    --> src/interpreter.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 102 | struct Array {
[INFO] [stdout]     |        ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 105 |     value_type: ValueType
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Array` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/parser.rs:100:19
[INFO] [stdout]     |
[INFO] [stdout] 100 |   named!(whitespace<&[u8]>,
[INFO] [stdout]     |   -                 ^^^^^ the same lifetime is elided here
[INFO] [stdout]     |  _|
[INFO] [stdout]     | |
[INFO] [stdout] 101 | |        recognize!(many1!(alt!(multispace | comment))));
[INFO] [stdout]     | |                                                      -
[INFO] [stdout]     | |                                                      |
[INFO] [stdout]     | |______________________________________________________the lifetime is named here
[INFO] [stdout]     |                                                        the same lifetime is named 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: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 100 | named!(whitespace<&'a [u8]>,
[INFO] [stdout]     |                    ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/parser.rs:103:16
[INFO] [stdout]     |
[INFO] [stdout] 103 |   named!(comment<&[u8]>,
[INFO] [stdout]     |   -              ^^^^^ the same lifetime is elided here
[INFO] [stdout]     |  _|
[INFO] [stdout]     | |
[INFO] [stdout] 104 | |        recognize!(
[INFO] [stdout] 105 | |            delimited!(
[INFO] [stdout] 106 | |                char!(';'),
[INFO] [stdout] 107 | |                opt!(is_not!("\r\n")),
[INFO] [stdout] 108 | |                alt!(tag!("\n") | tag!("\r\n")))));
[INFO] [stdout]     | |                                                 -
[INFO] [stdout]     | |                                                 |
[INFO] [stdout]     | |_________________________________________________the lifetime is named here
[INFO] [stdout]     |                                                   the same lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 103 | named!(comment<&'a [u8]>,
[INFO] [stdout]     |                 ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/parser.rs:117:1
[INFO] [stdout]     |
[INFO] [stdout] 117 | / named!(string_literal<String>,
[INFO] [stdout] 118 | |        map_res!(
[INFO] [stdout] 119 | |            map_res!(
[INFO] [stdout] 120 | |                delimited!(
[INFO] [stdout] ...   |
[INFO] [stdout] 124 | |                str::from_utf8),
[INFO] [stdout] 125 | |            FromStr::from_str));
[INFO] [stdout]     | |______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]     = note: this error originates in the macro `call` which comes from the expansion of the macro `named` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/parser.rs:147:1
[INFO] [stdout]     |
[INFO] [stdout] 147 | / named!(identifier<String>,
[INFO] [stdout] 148 | |        map_res!(
[INFO] [stdout] 149 | |            chain!(
[INFO] [stdout] 150 | |                identifier_str: map_res!(
[INFO] [stdout] ...   |
[INFO] [stdout] 160 | |                || identifier_str),
[INFO] [stdout] 161 | |            FromStr::from_str));
[INFO] [stdout]     | |______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `call` which comes from the expansion of the macro `named` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/ast.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Include(String),
[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]   = 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] 9 -     Include(String),
[INFO] [stdout] 9 +     Include(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast.rs:10:14
[INFO] [stdout]    |
[INFO] [stdout] 10 |     TypeDecl(TypeDecl),
[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] 10 -     TypeDecl(TypeDecl),
[INFO] [stdout] 10 +     TypeDecl(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `fields` are never read
[INFO] [stdout]   --> src/ast.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct TypeDecl {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 22 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 23 |     pub fields: Vec<Field>
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TypeDecl` 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`, `type_specifier`, and `array_size` are never read
[INFO] [stdout]   --> src/ast.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Field {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 28 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 29 |     pub type_specifier: Option<TypeSpecifier>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 30 |     pub array_size: Option<i32>
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Field` 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.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     Custom(String)
[INFO] [stdout]    |     ------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TypeSpecifier` has derived impls for the traits `Clone` and `Debug`, but these are 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] 38 -     Custom(String)
[INFO] [stdout] 38 +     Custom(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `type_specifier` is never read
[INFO] [stdout]   --> src/ast.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub struct FunctionDecl {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] 64 |     pub name: String,
[INFO] [stdout] 65 |     pub type_specifier: Option<TypeSpecifier>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FunctionDecl` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `type_specifier` is never read
[INFO] [stdout]   --> src/ast.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub struct FunctionCallOrArrayElemRef {
[INFO] [stdout]    |            -------------------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 86 |     pub type_specifier: Option<TypeSpecifier>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FunctionCallOrArrayElemRef` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:146:12
[INFO] [stdout]     |
[INFO] [stdout] 146 |     Repeat(Repeat),
[INFO] [stdout]     |     ------ ^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Statement` has derived impls for the traits `Clone` and `Debug`, but these are 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] 146 -     Repeat(Repeat),
[INFO] [stdout] 146 +     Repeat(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:148:12
[INFO] [stdout]     |
[INFO] [stdout] 148 |     Select(Select),
[INFO] [stdout]     |     ------ ^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Statement` has derived impls for the traits `Clone` and `Debug`, but these are 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] 148 -     Select(Select),
[INFO] [stdout] 148 +     Select(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `body` is never read
[INFO] [stdout]    --> src/ast.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 177 | pub struct Repeat {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] 178 |     pub body: StatementList
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Repeat` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `expr` and `arms` are never read
[INFO] [stdout]    --> src/ast.rs:210:9
[INFO] [stdout]     |
[INFO] [stdout] 209 | pub struct Select {
[INFO] [stdout]     |            ------ fields in this struct
[INFO] [stdout] 210 |     pub expr: Box<Expr>,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 211 |     pub arms: Vec<CaseArm>
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Select` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `body` are never read
[INFO] [stdout]    --> src/ast.rs:216:9
[INFO] [stdout]     |
[INFO] [stdout] 215 | pub struct CaseArm {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] 216 |     pub value: Box<Expr>,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 217 |     pub body: StatementList
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaseArm` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `is_const` is never read
[INFO] [stdout]   --> src/il.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct SingleVariable {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 38 |     pub name: String,
[INFO] [stdout] 39 |     pub is_const: bool,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SingleVariable` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `locals` is never read
[INFO] [stdout]   --> src/il.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub struct Function {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 57 |     pub signature: FunctionSignature,
[INFO] [stdout] 58 |     pub locals: Vec<Variable>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Function` 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 `name` is never read
[INFO] [stdout]   --> src/il.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub struct FunctionSignature {
[INFO] [stdout]    |            ----------------- field in this struct
[INFO] [stdout] 65 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FunctionSignature` 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_type` is never read
[INFO] [stdout]   --> src/interpreter.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 96 | struct SingleVariable {
[INFO] [stdout]    |        -------------- field in this struct
[INFO] [stdout] 97 |     value: Value,
[INFO] [stdout] 98 |     value_type: ValueType
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SingleVariable` 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_type` is never read
[INFO] [stdout]    --> src/interpreter.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 102 | struct Array {
[INFO] [stdout]     |        ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 105 |     value_type: ValueType
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Array` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/parser.rs:100:19
[INFO] [stdout]     |
[INFO] [stdout] 100 |   named!(whitespace<&[u8]>,
[INFO] [stdout]     |   -                 ^^^^^ the same lifetime is elided here
[INFO] [stdout]     |  _|
[INFO] [stdout]     | |
[INFO] [stdout] 101 | |        recognize!(many1!(alt!(multispace | comment))));
[INFO] [stdout]     | |                                                      -
[INFO] [stdout]     | |                                                      |
[INFO] [stdout]     | |______________________________________________________the lifetime is named here
[INFO] [stdout]     |                                                        the same lifetime is named 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: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 100 | named!(whitespace<&'a [u8]>,
[INFO] [stdout]     |                    ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/parser.rs:103:16
[INFO] [stdout]     |
[INFO] [stdout] 103 |   named!(comment<&[u8]>,
[INFO] [stdout]     |   -              ^^^^^ the same lifetime is elided here
[INFO] [stdout]     |  _|
[INFO] [stdout]     | |
[INFO] [stdout] 104 | |        recognize!(
[INFO] [stdout] 105 | |            delimited!(
[INFO] [stdout] 106 | |                char!(';'),
[INFO] [stdout] 107 | |                opt!(is_not!("\r\n")),
[INFO] [stdout] 108 | |                alt!(tag!("\n") | tag!("\r\n")))));
[INFO] [stdout]     | |                                                 -
[INFO] [stdout]     | |                                                 |
[INFO] [stdout]     | |_________________________________________________the lifetime is named here
[INFO] [stdout]     |                                                   the same lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 103 | named!(comment<&'a [u8]>,
[INFO] [stdout]     |                 ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/parser.rs:117:1
[INFO] [stdout]     |
[INFO] [stdout] 117 | / named!(string_literal<String>,
[INFO] [stdout] 118 | |        map_res!(
[INFO] [stdout] 119 | |            map_res!(
[INFO] [stdout] 120 | |                delimited!(
[INFO] [stdout] ...   |
[INFO] [stdout] 124 | |                str::from_utf8),
[INFO] [stdout] 125 | |            FromStr::from_str));
[INFO] [stdout]     | |______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]     = note: this error originates in the macro `call` which comes from the expansion of the macro `named` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/parser.rs:147:1
[INFO] [stdout]     |
[INFO] [stdout] 147 | / named!(identifier<String>,
[INFO] [stdout] 148 | |        map_res!(
[INFO] [stdout] 149 | |            chain!(
[INFO] [stdout] 150 | |                identifier_str: map_res!(
[INFO] [stdout] ...   |
[INFO] [stdout] 160 | |                || identifier_str),
[INFO] [stdout] 161 | |            FromStr::from_str));
[INFO] [stdout]     | |______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `call` which comes from the expansion of the macro `named` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `butterball` (bin "butterball") due to 2 previous errors; 27 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `butterball` (bin "butterball" test) due to 2 previous errors; 27 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "78970c976ce72de78a1f5dfde5b408ef6bb95d98ea86b51231a4669b568a7cb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78970c976ce72de78a1f5dfde5b408ef6bb95d98ea86b51231a4669b568a7cb1", kill_on_drop: false }`
[INFO] [stdout] 78970c976ce72de78a1f5dfde5b408ef6bb95d98ea86b51231a4669b568a7cb1
