[INFO] cloning repository https://github.com/ThePerkinrex/TestLang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ThePerkinrex/TestLang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThePerkinrex%2FTestLang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThePerkinrex%2FTestLang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 738e07cfec8e821ce0546e0ad68b0c1a1e1ba4b7
[INFO] checking ThePerkinrex/TestLang against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThePerkinrex%2FTestLang" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ThePerkinrex/TestLang
[INFO] finished tweaking git repo https://github.com/ThePerkinrex/TestLang
[INFO] tweaked toml for git repo https://github.com/ThePerkinrex/TestLang written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ThePerkinrex/TestLang on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ThePerkinrex/TestLang 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded structopt-derive v0.4.14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "9f48277c7336c9be7c3cc47ee62aa0bede497b5ac2c3a611674283bc75d6190c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f48277c7336c9be7c3cc47ee62aa0bede497b5ac2c3a611674283bc75d6190c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f48277c7336c9be7c3cc47ee62aa0bede497b5ac2c3a611674283bc75d6190c", kill_on_drop: false }`
[INFO] [stdout] 9f48277c7336c9be7c3cc47ee62aa0bede497b5ac2c3a611674283bc75d6190c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3febe772ea22ad24c7a3b9e961ebc42881ad1e68327bde6a18948cbbe214141b
[INFO] running `Command { std: "docker" "start" "-a" "3febe772ea22ad24c7a3b9e961ebc42881ad1e68327bde6a18948cbbe214141b", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::types::Trait`
[INFO] [stdout]   --> src/ast/traits.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub use super::types::Trait;
[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: `traits::*`
[INFO] [stdout]  --> src/ast/mod.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use traits::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/backend/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/backend/js.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::types::Trait`
[INFO] [stdout]   --> src/ast/traits.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub use super::types::Trait;
[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: `traits::*`
[INFO] [stdout]  --> src/ast/mod.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use traits::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/backend/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/backend/js.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]  --> src/backend/js.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `type_db`
[INFO] [stdout]  --> src/backend/js.rs:8:46
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_type_db`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `options`
[INFO] [stdout]  --> src/backend/js.rs:8:68
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                                                                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_options`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]  --> src/backend/js.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `type_db`
[INFO] [stdout]  --> src/backend/js.rs:8:46
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_type_db`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `options`
[INFO] [stdout]  --> src/backend/js.rs:8:68
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                                                                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_options`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `imp` is never read
[INFO] [stdout]   --> src/ast/types.rs:70:2
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub struct Type {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 69 |     data: TypeData,
[INFO] [stdout] 70 |     imp: Impl,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Type` has a derived impl for the trait `Clone`, 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: variant `Err` is never constructed
[INFO] [stdout]    --> src/ast/types.rs:123:2
[INFO] [stdout]     |
[INFO] [stdout] 115 | pub enum TypeData {
[INFO] [stdout]     |          -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 123 |     Err,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `TypeData` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `imp` is never read
[INFO] [stdout]   --> src/ast/types.rs:70:2
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub struct Type {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 69 |     data: TypeData,
[INFO] [stdout] 70 |     imp: Impl,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Type` has a derived impl for the trait `Clone`, 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: variant `Err` is never constructed
[INFO] [stdout]    --> src/ast/types.rs:123:2
[INFO] [stdout]     |
[INFO] [stdout] 115 | pub enum TypeData {
[INFO] [stdout]     |          -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 123 |     Err,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `TypeData` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `methods` is never read
[INFO] [stdout]    --> src/ast/types.rs:212:2
[INFO] [stdout]     |
[INFO] [stdout] 211 | pub struct Impl {
[INFO] [stdout]     |            ---- field in this struct
[INFO] [stdout] 212 |     methods: HashMap<Ident, (Type, Span<Block>)>,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Impl` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Define`, `DefineMut`, and `None` are never constructed
[INFO] [stdout]   --> src/ast/expr.rs:31:2
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub enum Expr {
[INFO] [stdout]    |          ---- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 31 |     Define(Ident, Box<Span<Expr>>),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 32 |     DefineMut(Ident, Box<Span<Expr>>),
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 33 |     CompilerIntrinsic(Intrinsic),
[INFO] [stdout] 34 |     None,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expr` 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: variant `Never` is never constructed
[INFO] [stdout]   --> src/ast/value.rs:15:2
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub enum Value {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 15 |     Never,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Value` 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: variants `Warning` and `Info` are never constructed
[INFO] [stdout]   --> src/error.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub enum ErrorKind {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] 44 |     Error(i32),
[INFO] [stdout] 45 |     Warning,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 46 |     Info,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrorKind` 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: method `name` is never used
[INFO] [stdout]  --> src/file_provider.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait FileReader {
[INFO] [stdout]   |           ---------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 8 |     fn name(&self) -> Option<&Path>;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/file_provider.rs:21:3
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub struct File {
[INFO] [stdout]    |                ---- field in this struct
[INFO] [stdout] 21 |         name: PathBuf,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `methods` is never read
[INFO] [stdout]    --> src/ast/types.rs:212:2
[INFO] [stdout]     |
[INFO] [stdout] 211 | pub struct Impl {
[INFO] [stdout]     |            ---- field in this struct
[INFO] [stdout] 212 |     methods: HashMap<Ident, (Type, Span<Block>)>,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Impl` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Define`, `DefineMut`, and `None` are never constructed
[INFO] [stdout]   --> src/ast/expr.rs:31:2
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub enum Expr {
[INFO] [stdout]    |          ---- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 31 |     Define(Ident, Box<Span<Expr>>),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 32 |     DefineMut(Ident, Box<Span<Expr>>),
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 33 |     CompilerIntrinsic(Intrinsic),
[INFO] [stdout] 34 |     None,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expr` 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: variant `Never` is never constructed
[INFO] [stdout]   --> src/ast/value.rs:15:2
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub enum Value {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 15 |     Never,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Value` 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: variants `Warning` and `Info` are never constructed
[INFO] [stdout]   --> src/error.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub enum ErrorKind {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] 44 |     Error(i32),
[INFO] [stdout] 45 |     Warning,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 46 |     Info,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrorKind` 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: method `name` is never used
[INFO] [stdout]  --> src/file_provider.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait FileReader {
[INFO] [stdout]   |           ---------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 8 |     fn name(&self) -> Option<&Path>;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/file_provider.rs:21:3
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub struct File {
[INFO] [stdout]    |                ---- field in this struct
[INFO] [stdout] 21 |         name: PathBuf,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `map` is never used
[INFO] [stdout]    --> src/scope.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout]  50 | impl<T: Clone> Scope<T> {
[INFO] [stdout]     | ----------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 138 |     pub fn map<U: Clone, F: Fn(T) -> U>(mut self, f: &F) -> Scope<U> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `warn` and `info` are never used
[INFO] [stdout]    --> src/span/mod.rs:186:5
[INFO] [stdout]     |
[INFO] [stdout] 184 | pub trait SpanError {
[INFO] [stdout]     |           --------- methods in this trait
[INFO] [stdout] 185 |     fn error<T: ToString, R: Into<i32>>(&self, info: T, r: R) -> Error;
[INFO] [stdout] 186 |     fn warn<T: ToString>(&self, info: T) -> Error;
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 187 |     fn info<T: ToString>(&self, info: T) -> Error;
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `out` is never read
[INFO] [stdout]   --> src/options.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct CodegenOptions {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 33 |     pub lib: bool,
[INFO] [stdout] 34 |     pub out: Option<PathBuf>,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `map` is never used
[INFO] [stdout]    --> src/scope.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout]  50 | impl<T: Clone> Scope<T> {
[INFO] [stdout]     | ----------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 138 |     pub fn map<U: Clone, F: Fn(T) -> U>(mut self, f: &F) -> Scope<U> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `warn` and `info` are never used
[INFO] [stdout]    --> src/span/mod.rs:186:5
[INFO] [stdout]     |
[INFO] [stdout] 184 | pub trait SpanError {
[INFO] [stdout]     |           --------- methods in this trait
[INFO] [stdout] 185 |     fn error<T: ToString, R: Into<i32>>(&self, info: T, r: R) -> Error;
[INFO] [stdout] 186 |     fn warn<T: ToString>(&self, info: T) -> Error;
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 187 |     fn info<T: ToString>(&self, info: T) -> Error;
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `out` is never read
[INFO] [stdout]   --> src/options.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct CodegenOptions {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 33 |     pub lib: bool,
[INFO] [stdout] 34 |     pub out: Option<PathBuf>,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/span/location.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | /             format!(
[INFO] [stdout] 56 | |                 "[{}] Location start ({}) isn't smaller than location end ({})",
[INFO] [stdout] 57 | |                 file.into().display(),
[INFO] [stdout] 58 | |                 s,
[INFO] [stdout] 59 | |                 e
[INFO] [stdout] 60 | |             )
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `assert!()` 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: the `assert!()` macro supports formatting, so there's no need for the `format!()` macro here
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 55 ~             
[INFO] [stdout] 56 |                 "[{}] Location start ({}) isn't smaller than location end ({})",
[INFO] [stdout] ...
[INFO] [stdout] 59 |                 e
[INFO] [stdout] 60 ~             
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/span/location.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | /             format!(
[INFO] [stdout] 56 | |                 "[{}] Location start ({}) isn't smaller than location end ({})",
[INFO] [stdout] 57 | |                 file.into().display(),
[INFO] [stdout] 58 | |                 s,
[INFO] [stdout] 59 | |                 e
[INFO] [stdout] 60 | |             )
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `assert!()` 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: the `assert!()` macro supports formatting, so there's no need for the `format!()` macro here
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 55 ~             
[INFO] [stdout] 56 |                 "[{}] Location start ({}) isn't smaller than location end ({})",
[INFO] [stdout] ...
[INFO] [stdout] 59 |                 e
[INFO] [stdout] 60 ~             
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.22s
[INFO] running `Command { std: "docker" "inspect" "3febe772ea22ad24c7a3b9e961ebc42881ad1e68327bde6a18948cbbe214141b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3febe772ea22ad24c7a3b9e961ebc42881ad1e68327bde6a18948cbbe214141b", kill_on_drop: false }`
[INFO] [stdout] 3febe772ea22ad24c7a3b9e961ebc42881ad1e68327bde6a18948cbbe214141b
