[INFO] cloning repository https://github.com/AaronC81/babble
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AaronC81/babble" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAaronC81%2Fbabble", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAaronC81%2Fbabble'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fc377006385115547f9912a66ede9c96a1790b10
[INFO] checking AaronC81/babble against try#863511eff87e66198b396935f3b5c8a543022f53 for pr-139493-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAaronC81%2Fbabble" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AaronC81/babble
[INFO] finished tweaking git repo https://github.com/AaronC81/babble
[INFO] tweaked toml for git repo https://github.com/AaronC81/babble written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AaronC81/babble on toolchain 863511eff87e66198b396935f3b5c8a543022f53
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+863511eff87e66198b396935f3b5c8a543022f53" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AaronC81/babble 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" "+863511eff87e66198b396935f3b5c8a543022f53" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+863511eff87e66198b396935f3b5c8a543022f53" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd26b1856ed219366523276a7ebb81f12487af6b56e29f0b89a4dbd78c72a6df
[INFO] running `Command { std: "docker" "start" "-a" "bd26b1856ed219366523276a7ebb81f12487af6b56e29f0b89a4dbd78c72a6df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd26b1856ed219366523276a7ebb81f12487af6b56e29f0b89a4dbd78c72a6df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd26b1856ed219366523276a7ebb81f12487af6b56e29f0b89a4dbd78c72a6df", kill_on_drop: false }`
[INFO] [stdout] bd26b1856ed219366523276a7ebb81f12487af6b56e29f0b89a4dbd78c72a6df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+863511eff87e66198b396935f3b5c8a543022f53" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bbf260185997a093e58ffe170f70f4245dd1f30905e2ade9473c3396fcf9e9d5
[INFO] running `Command { std: "docker" "start" "-a" "bbf260185997a093e58ffe170f70f4245dd1f30905e2ade9473c3396fcf9e9d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.64
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]    Compiling serde v1.0.171
[INFO] [stderr]    Compiling thiserror v1.0.43
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
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[INFO] [stderr]    Compiling rustix v0.38.3
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[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling pkg-config v0.3.27
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[INFO] [stderr]    Compiling pest_meta v2.7.0
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[INFO] [stderr]    Compiling pest_derive v2.7.0
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[INFO] [stderr]     Checking toml v0.5.11
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[INFO] [stderr]     Checking askama_shared v0.12.2
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[INFO] [stderr]    Compiling askama_derive v0.11.2
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[INFO] [stderr]     Checking babble v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/interpreter/mod.rs:662:12
[INFO] [stdout]     |
[INFO] [stdout] 662 |         if let Err(error) = &result && error.kind.is_fatal() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/interpreter/mod.rs:712:20
[INFO] [stdout]     |
[INFO] [stdout] 712 |                 if let Err(error) = &result && error.kind.is_fatal() {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/interpreter/mod.rs:662:12
[INFO] [stdout]     |
[INFO] [stdout] 662 |         if let Err(error) = &result && error.kind.is_fatal() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/interpreter/mod.rs:712:20
[INFO] [stdout]     |
[INFO] [stdout] 712 |                 if let Err(error) = &result && error.kind.is_fatal() {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/parser/pattern.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::collections::HashMap;
[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: `Literal`
[INFO] [stdout]  --> src/parser/traits.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::{Node, NodeKind, Literal, SugarNodeKind};
[INFO] [stdout]   |                             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BlockParameters`
[INFO] [stdout]  --> src/interpreter/value.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::parser::{BlockParameters, Literal};
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashMap`
[INFO] [stdout]  --> src/interpreter/block.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{sync::atomic::AtomicUsize, collections::HashMap, hash::{Hasher, Hash}};
[INFO] [stdout]   |                                      ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `InterpreterErrorKind`, `InterpreterResult`, `Interpreter`, `LocalVariable`, `StackFrameContext`, `StackFrame`, and `Value`
[INFO] [stdout]   --> src/interpreter/block.rs:10:23
[INFO] [stdout]    |
[INFO] [stdout] 10 | ...Ref, InterpreterResult, Interpreter, InterpreterErrorKind, StackFrame, StackFrameContext, LocalVariableRef, LocalVariable, Value, inst...
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^^^^^^                    ^^^^^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `InterpreterErrorKind`, `LocalVariable`, `StackFrameContext`, and `StackFrame`
[INFO] [stdout]  --> src/interpreter/method.rs:7:55
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::{Interpreter, ValueRef, InterpreterResult, InterpreterErrorKind, StackFrame, StackFrameContext, LocalVariable, instruction::In...
[INFO] [stdout]   |                                                       ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `any::Any` and `sync::RwLock`
[INFO] [stdout]  --> src/interpreter/stdlib.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::{process::exit, sync::RwLock, fs::File, io::{Read, Write}, any::Any, hash::{Hash, Hasher}, collections::hash_map::DefaultHasher};
[INFO] [stdout]   |                          ^^^^^^^^^^^^                               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SendMessageComponents` and `SendMessageParameter`
[INFO] [stdout]  --> src/interpreter/stdlib.rs:9:58
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::{interpreter::{Type, Method, Value}, parser::{SendMessageComponents, SendMessageParameter}, source::SourceFile};
[INFO] [stdout]   |                                                          ^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ValueRef`
[INFO] [stdout]   --> src/interpreter/stdlib.rs:11:161
[INFO] [stdout]    |
[INFO] [stdout] 11 | ...eCoreMixinDeriveBuilder, InterpreterError, DocumentationState, ValueRef, PrimitiveValue, Variant};
[INFO] [stdout]    |                                                                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Method`
[INFO] [stdout]  --> src/interpreter/mixin_derive.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 | use super::{Type, Method, Value, Interpreter};
[INFO] [stdout]   |                   ^^^^^^
[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:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![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 `trait_upcasting` has been stable since 1.86.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(trait_upcasting)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `result_flattening` has been stable since 1.89.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(result_flattening)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `type_name_of_val` has been stable since 1.76.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(type_name_of_val)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/parser/pattern.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::collections::HashMap;
[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: `Literal`
[INFO] [stdout]  --> src/parser/traits.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::{Node, NodeKind, Literal, SugarNodeKind};
[INFO] [stdout]   |                             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BlockParameters`
[INFO] [stdout]  --> src/interpreter/value.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::parser::{BlockParameters, Literal};
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashMap`
[INFO] [stdout]  --> src/interpreter/block.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{sync::atomic::AtomicUsize, collections::HashMap, hash::{Hasher, Hash}};
[INFO] [stdout]   |                                      ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `InterpreterErrorKind`, `InterpreterResult`, `Interpreter`, `LocalVariable`, `StackFrameContext`, `StackFrame`, and `Value`
[INFO] [stdout]   --> src/interpreter/block.rs:10:23
[INFO] [stdout]    |
[INFO] [stdout] 10 | ...Ref, InterpreterResult, Interpreter, InterpreterErrorKind, StackFrame, StackFrameContext, LocalVariableRef, LocalVariable, Value, inst...
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^^^^^^                    ^^^^^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `InterpreterErrorKind`, `LocalVariable`, `StackFrameContext`, and `StackFrame`
[INFO] [stdout]  --> src/interpreter/method.rs:7:55
[INFO] [stdout]   |
[INFO] [stdout] 7 | use super::{Interpreter, ValueRef, InterpreterResult, InterpreterErrorKind, StackFrame, StackFrameContext, LocalVariable, instruction::In...
[INFO] [stdout]   |                                                       ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `any::Any` and `sync::RwLock`
[INFO] [stdout]  --> src/interpreter/stdlib.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::{process::exit, sync::RwLock, fs::File, io::{Read, Write}, any::Any, hash::{Hash, Hasher}, collections::hash_map::DefaultHasher};
[INFO] [stdout]   |                          ^^^^^^^^^^^^                               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SendMessageComponents` and `SendMessageParameter`
[INFO] [stdout]  --> src/interpreter/stdlib.rs:9:58
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::{interpreter::{Type, Method, Value}, parser::{SendMessageComponents, SendMessageParameter}, source::SourceFile};
[INFO] [stdout]   |                                                          ^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ValueRef`
[INFO] [stdout]   --> src/interpreter/stdlib.rs:11:161
[INFO] [stdout]    |
[INFO] [stdout] 11 | ...eCoreMixinDeriveBuilder, InterpreterError, DocumentationState, ValueRef, PrimitiveValue, Variant};
[INFO] [stdout]    |                                                                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::source::SourceFile`
[INFO] [stdout]  --> src/interpreter/mixin_derive.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::source::SourceFile;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Method` and `Value`
[INFO] [stdout]  --> src/interpreter/mixin_derive.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 | use super::{Type, Method, Value, Interpreter};
[INFO] [stdout]   |                   ^^^^^^  ^^^^^
[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:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![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 `trait_upcasting` has been stable since 1.86.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(trait_upcasting)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `result_flattening` has been stable since 1.89.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(result_flattening)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `type_name_of_val` has been stable since 1.76.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(type_name_of_val)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `location`
[INFO] [stdout]    --> src/parser/mod.rs:289:17
[INFO] [stdout]     |
[INFO] [stdout] 289 |             let location = self.here().location.clone();
[INFO] [stdout]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_location`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]    --> src/parser/mod.rs:514:56
[INFO] [stdout]     |
[INFO] [stdout] 514 |             if let Token { kind: TokenKind::Identifier(id), .. } = self.here() {
[INFO] [stdout]     |                                                        ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `location`
[INFO] [stdout]    --> src/parser/mod.rs:289:17
[INFO] [stdout]     |
[INFO] [stdout] 289 |             let location = self.here().location.clone();
[INFO] [stdout]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_location`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]    --> src/parser/mod.rs:514:56
[INFO] [stdout]     |
[INFO] [stdout] 514 |             if let Token { kind: TokenKind::Identifier(id), .. } = self.here() {
[INFO] [stdout]     |                                                        ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/interpreter/value.rs:258:33
[INFO] [stdout]     |
[INFO] [stdout] 258 |             TypeInstance::Block(b) => "[ block ]".into(),
[INFO] [stdout]     |                                 ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/interpreter/value.rs:258:33
[INFO] [stdout]     |
[INFO] [stdout] 258 |             TypeInstance::Block(b) => "[ block ]".into(),
[INFO] [stdout]     |                                 ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/interpreter/stdlib.rs:362:59
[INFO] [stdout]     |
[INFO] [stdout] 362 |             Method::new_internal("toAsciiCode", |_, recv, a| {
[INFO] [stdout]     |                                                           ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/interpreter/stdlib.rs:354:57
[INFO] [stdout]     |
[INFO] [stdout] 354 |             Method::new_internal("lowercase", |_, recv, a| {
[INFO] [stdout]     |                                                         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/interpreter/stdlib.rs:346:57
[INFO] [stdout]     |
[INFO] [stdout] 346 |             Method::new_internal("uppercase", |_, recv, a| {
[INFO] [stdout]     |                                                         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/interpreter/stdlib.rs:362:59
[INFO] [stdout]     |
[INFO] [stdout] 362 |             Method::new_internal("toAsciiCode", |_, recv, a| {
[INFO] [stdout]     |                                                           ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/interpreter/stdlib.rs:354:57
[INFO] [stdout]     |
[INFO] [stdout] 354 |             Method::new_internal("lowercase", |_, recv, a| {
[INFO] [stdout]     |                                                         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/interpreter/stdlib.rs:346:57
[INFO] [stdout]     |
[INFO] [stdout] 346 |             Method::new_internal("uppercase", |_, recv, a| {
[INFO] [stdout]     |                                                         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]    --> src/interpreter/stdlib.rs:685:48
[INFO] [stdout]     |
[INFO] [stdout] 685 |             Method::new_internal("defer:", |i, r, a| {
[INFO] [stdout]     |                                                ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/interpreter/stdlib.rs:676:51
[INFO] [stdout]     |
[INFO] [stdout] 676 |             Method::new_internal("case:assert:", |i, _, a| {
[INFO] [stdout]     |                                                   ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]    --> src/interpreter/stdlib.rs:685:48
[INFO] [stdout]     |
[INFO] [stdout] 685 |             Method::new_internal("defer:", |i, r, a| {
[INFO] [stdout]     |                                                ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/interpreter/stdlib.rs:676:51
[INFO] [stdout]     |
[INFO] [stdout] 676 |             Method::new_internal("case:assert:", |i, _, a| {
[INFO] [stdout]     |                                                   ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/interpreter/mod.rs:536:75
[INFO] [stdout]     |
[INFO] [stdout] 536 |     pub fn handle_magic(&mut self, receiver: ValueRef, method_name: &str, args: &[ValueRef]) -> InterpreterResult {
[INFO] [stdout]     |                                                                           ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/interpreter/mod.rs:661:13
[INFO] [stdout]     |
[INFO] [stdout] 661 |         let mut result = self.evaluate(&block.body);
[INFO] [stdout]     |             ----^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/interpreter/mod.rs:536:75
[INFO] [stdout]     |
[INFO] [stdout] 536 |     pub fn handle_magic(&mut self, receiver: ValueRef, method_name: &str, args: &[ValueRef]) -> InterpreterResult {
[INFO] [stdout]     |                                                                           ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/interpreter/mod.rs:661:13
[INFO] [stdout]     |
[INFO] [stdout] 661 |         let mut result = self.evaluate(&block.body);
[INFO] [stdout]     |             ----^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `babble` (bin "babble") due to 2 previous errors; 25 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `babble` (bin "babble" test) due to 2 previous errors; 24 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "bbf260185997a093e58ffe170f70f4245dd1f30905e2ade9473c3396fcf9e9d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbf260185997a093e58ffe170f70f4245dd1f30905e2ade9473c3396fcf9e9d5", kill_on_drop: false }`
[INFO] [stdout] bbf260185997a093e58ffe170f70f4245dd1f30905e2ade9473c3396fcf9e9d5
