[INFO] cloning repository https://github.com/zesterer/bread
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zesterer/bread" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzesterer%2Fbread", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzesterer%2Fbread'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b17b058afcf74bc104d3c8475fc26d36f77e06b9
[INFO] checking zesterer/bread against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzesterer%2Fbread" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zesterer/bread on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zesterer/bread
[INFO] finished tweaking git repo https://github.com/zesterer/bread
[INFO] tweaked toml for git repo https://github.com/zesterer/bread written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/zesterer/bread already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df6ebe58fc076affee750d724e065d5fa48baf8eee130444633a14bf301303b9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "df6ebe58fc076affee750d724e065d5fa48baf8eee130444633a14bf301303b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df6ebe58fc076affee750d724e065d5fa48baf8eee130444633a14bf301303b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df6ebe58fc076affee750d724e065d5fa48baf8eee130444633a14bf301303b9", kill_on_drop: false }`
[INFO] [stdout] df6ebe58fc076affee750d724e065d5fa48baf8eee130444633a14bf301303b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af8109bcc7ee0c016003c9b0562584092326af721ea016fa43dd57978aee1e27
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "af8109bcc7ee0c016003c9b0562584092326af721ea016fa43dd57978aee1e27", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking yansi v0.5.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking ranges v0.4.0 (https://gitlab.com/bit-refined/ranges.git#91f6400c)
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]     Checking nibble_vec v0.1.0
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking lock_api v0.4.5
[INFO] [stderr]     Checking ariadne v0.1.3
[INFO] [stderr]     Checking radix_trie v0.2.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking parking_lot_core v0.8.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking fd-lock v3.0.0
[INFO] [stderr]     Checking nix v0.22.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]    Compiling const-random-macro v0.1.13
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking internment v0.5.4
[INFO] [stderr]     Checking const-random v0.1.13
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking chumsky v0.5.0 (https://github.com/zesterer/chumsky.git#549341fa)
[INFO] [stderr]     Checking tao_syntax v0.1.0 (/opt/rustwide/workdir/syntax)
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking rustyline v9.0.0
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]    --> syntax/src/parse.rs:508:36
[INFO] [stdout]     |
[INFO] [stdout] 508 |                 Chain::Apply(None, span) => SrcNode::new(ast::Expr::Error, expr.span()),
[INFO] [stdout]     |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tao_analysis v0.1.0 (/opt/rustwide/workdir/analysis)
[INFO] [stdout] warning: unused imports: `cmp::Ord`, `ops::Range`
[INFO] [stdout]  --> analysis/src/exhaustivity.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     ops::Range,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 4 |     cmp::Ord,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]   --> analysis/src/lib.rs:35:26
[INFO] [stdout]    |
[INFO] [stdout] 35 | use hashbrown::{HashMap, HashSet};
[INFO] [stdout]    |                          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cmp::Ord`, `ops::Range`
[INFO] [stdout]  --> analysis/src/exhaustivity.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     ops::Range,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 4 |     cmp::Ord,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]   --> analysis/src/lib.rs:35:26
[INFO] [stdout]    |
[INFO] [stdout] 35 | use hashbrown::{HashMap, HashSet};
[INFO] [stdout]    |                          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> analysis/src/exhaustivity.rs:262:13
[INFO] [stdout]     |
[INFO] [stdout] 262 |             ty => todo!("{:?}", ty),
[INFO] [stdout]     |             ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `attr`
[INFO] [stdout]    --> analysis/src/context.rs:123:14
[INFO] [stdout]     |
[INFO] [stdout] 123 |         for (attr, def) in defs {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_attr`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> analysis/src/context.rs:166:32
[INFO] [stdout]     |
[INFO] [stdout] 166 |                 Ty::Data(data, args) => if already_seen.contains(&data) {
[INFO] [stdout]     |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]   --> analysis/src/data.rs:92:47
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn define_data(&mut self, id: DataId, span: Span, data: Data) -> Result<(), Vec<Error>> {
[INFO] [stdout]    |                                               ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]    --> analysis/src/exhaustivity.rs:221:21
[INFO] [stdout]     |
[INFO] [stdout] 221 |             Ty::Gen(idx, _) => {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pat`
[INFO] [stdout]    --> analysis/src/exhaustivity.rs:225:25
[INFO] [stdout]     |
[INFO] [stdout] 225 |                         pat => {},
[INFO] [stdout]     |                         ^^^ help: if this is intentional, prefix it with an underscore: `_pat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item_ty`
[INFO] [stdout]    --> analysis/src/exhaustivity.rs:230:22
[INFO] [stdout]     |
[INFO] [stdout] 230 |             Ty::List(item_ty) => {
[INFO] [stdout]     |                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_item_ty`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> analysis/src/infer.rs:271:25
[INFO] [stdout]     |
[INFO] [stdout] 271 |             TyInfo::Gen(x, _, origin) => ty,//self.insert(span, TyInfo::Unknown(Some(origin))),
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]    --> analysis/src/infer.rs:271:31
[INFO] [stdout]     |
[INFO] [stdout] 271 |             TyInfo::Gen(x, _, origin) => ty,//self.insert(span, TyInfo::Unknown(Some(origin))),
[INFO] [stdout]     |                               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> analysis/src/lower.rs:242:46
[INFO] [stdout]     |
[INFO] [stdout] 242 |                     let get_gen = |index, _, ctx: &Context| generic_tys[index];
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data_gen_scope`
[INFO] [stdout]    --> analysis/src/lower.rs:241:25
[INFO] [stdout]     |
[INFO] [stdout] 241 |                     let data_gen_scope = data.gen_scope;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_data_gen_scope`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> analysis/src/lower.rs:299:53
[INFO] [stdout]     |
[INFO] [stdout] 299 |                     let get_gen = |index: usize, _, ctx: &Context| generic_tys[index].1;
[INFO] [stdout]     |                                                     ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> analysis/src/lower.rs:535:46
[INFO] [stdout]     |
[INFO] [stdout] 535 |                     let get_gen = |index, _, ctx: &Context| generic_tys[index];
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `def_gen_scope`
[INFO] [stdout]    --> analysis/src/lower.rs:297:25
[INFO] [stdout]     |
[INFO] [stdout] 297 |                     let def_gen_scope = def.gen_scope;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_def_gen_scope`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data_gen_scope`
[INFO] [stdout]    --> analysis/src/lower.rs:534:25
[INFO] [stdout]     |
[INFO] [stdout] 534 |                     let data_gen_scope = data.gen_scope;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_data_gen_scope`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stdout] warning: field is never read: `alias_lut`
[INFO] [stdout]   --> analysis/src/data.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     alias_lut: HashMap<Ident, Alias>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `follow`
[INFO] [stdout]   --> analysis/src/infer.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn follow(&self, ty: TyVar) -> TyVar {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `with`
[INFO] [stdout]   --> analysis/src/lower.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn with(&self, name: SrcNode<Ident>, ty: TyVar) -> Scope<'_> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> analysis/src/exhaustivity.rs:262:13
[INFO] [stdout]     |
[INFO] [stdout] 262 |             ty => todo!("{:?}", ty),
[INFO] [stdout]     |             ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `attr`
[INFO] [stdout]    --> analysis/src/context.rs:123:14
[INFO] [stdout]     |
[INFO] [stdout] 123 |         for (attr, def) in defs {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_attr`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> analysis/src/context.rs:166:32
[INFO] [stdout]     |
[INFO] [stdout] 166 |                 Ty::Data(data, args) => if already_seen.contains(&data) {
[INFO] [stdout]     |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]   --> analysis/src/data.rs:92:47
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn define_data(&mut self, id: DataId, span: Span, data: Data) -> Result<(), Vec<Error>> {
[INFO] [stdout]    |                                               ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]    --> analysis/src/exhaustivity.rs:221:21
[INFO] [stdout]     |
[INFO] [stdout] 221 |             Ty::Gen(idx, _) => {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pat`
[INFO] [stdout]    --> analysis/src/exhaustivity.rs:225:25
[INFO] [stdout]     |
[INFO] [stdout] 225 |                         pat => {},
[INFO] [stdout]     |                         ^^^ help: if this is intentional, prefix it with an underscore: `_pat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item_ty`
[INFO] [stdout]    --> analysis/src/exhaustivity.rs:230:22
[INFO] [stdout]     |
[INFO] [stdout] 230 |             Ty::List(item_ty) => {
[INFO] [stdout]     |                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_item_ty`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> analysis/src/infer.rs:271:25
[INFO] [stdout]     |
[INFO] [stdout] 271 |             TyInfo::Gen(x, _, origin) => ty,//self.insert(span, TyInfo::Unknown(Some(origin))),
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]    --> analysis/src/infer.rs:271:31
[INFO] [stdout]     |
[INFO] [stdout] 271 |             TyInfo::Gen(x, _, origin) => ty,//self.insert(span, TyInfo::Unknown(Some(origin))),
[INFO] [stdout]     |                               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> analysis/src/lower.rs:242:46
[INFO] [stdout]     |
[INFO] [stdout] 242 |                     let get_gen = |index, _, ctx: &Context| generic_tys[index];
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data_gen_scope`
[INFO] [stdout]    --> analysis/src/lower.rs:241:25
[INFO] [stdout]     |
[INFO] [stdout] 241 |                     let data_gen_scope = data.gen_scope;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_data_gen_scope`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> analysis/src/lower.rs:299:53
[INFO] [stdout]     |
[INFO] [stdout] 299 |                     let get_gen = |index: usize, _, ctx: &Context| generic_tys[index].1;
[INFO] [stdout]     |                                                     ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> analysis/src/lower.rs:535:46
[INFO] [stdout]     |
[INFO] [stdout] 535 |                     let get_gen = |index, _, ctx: &Context| generic_tys[index];
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `def_gen_scope`
[INFO] [stdout]    --> analysis/src/lower.rs:297:25
[INFO] [stdout]     |
[INFO] [stdout] 297 |                     let def_gen_scope = def.gen_scope;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_def_gen_scope`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data_gen_scope`
[INFO] [stdout]    --> analysis/src/lower.rs:534:25
[INFO] [stdout]     |
[INFO] [stdout] 534 |                     let data_gen_scope = data.gen_scope;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_data_gen_scope`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tao_middle v0.1.0 (/opt/rustwide/workdir/middle)
[INFO] [stdout] warning: unused import: `type_name`
[INFO] [stdout]  --> middle/src/opt/mod.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::any::{Any, type_name};
[INFO] [stdout]   |                     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ast::BinaryOp::*`
[INFO] [stdout]    --> middle/src/lower.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |                 use ast::BinaryOp::*;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TyNode`
[INFO] [stdout]   --> middle/src/lib.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     TyNode,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `type_name`
[INFO] [stdout]  --> middle/src/opt/mod.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::any::{Any, type_name};
[INFO] [stdout]   |                     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ast::BinaryOp::*`
[INFO] [stdout]    --> middle/src/lower.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |                 use ast::BinaryOp::*;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TyNode`
[INFO] [stdout]   --> middle/src/lib.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     TyNode,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `alias_lut`
[INFO] [stdout]   --> analysis/src/data.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     alias_lut: HashMap<Ident, Alias>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `follow`
[INFO] [stdout]   --> analysis/src/infer.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn follow(&self, ty: TyVar) -> TyVar {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `with`
[INFO] [stdout]   --> analysis/src/lower.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn with(&self, name: SrcNode<Ident>, ty: TyVar) -> Scope<'_> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0170]: pattern binding `Not` is named the same as one of the variants of the type `UnaryOp`
[INFO] [stdout]    --> middle/src/lower.rs:146:22
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     (Not, Prim(Bool)) => mir::Intrinsic::NotBool,
[INFO] [stdout]     |                      ^^^ help: to match on the variant, qualify the path: `UnaryOp::Not`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bindings_with_variant_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]   --> middle/src/error.rs:12:50
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn write<C: ariadne::Cache<SrcId>>(self, ctx: &Context, cache: C, writer: impl Write) {
[INFO] [stdout]    |                                                  ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> middle/src/opt/mod.rs:299:14
[INFO] [stdout]     |
[INFO] [stdout] 299 | pub fn check(ctx: &Context) {
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> middle/src/opt/mod.rs:300:22
[INFO] [stdout]     |
[INFO] [stdout] 300 |     fn check_binding(ctx: &Context, binding: &Binding, repr: &Repr, stack: &mut Vec<(Ident, Repr)>) {
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> middle/src/opt/mod.rs:300:69
[INFO] [stdout]     |
[INFO] [stdout] 300 |     fn check_binding(ctx: &Context, binding: &Binding, repr: &Repr, stack: &mut Vec<(Ident, Repr)>) {
[INFO] [stdout]     |                                                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `repr`
[INFO] [stdout]    --> middle/src/opt/mod.rs:317:39
[INFO] [stdout]     |
[INFO] [stdout] 317 |             (Expr::Match(pred, arms), repr) => {
[INFO] [stdout]     |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_repr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `body`
[INFO] [stdout]    --> middle/src/opt/mod.rs:318:27
[INFO] [stdout]     |
[INFO] [stdout] 318 |                 for (arm, body) in arms {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_body`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `captures`
[INFO] [stdout]    --> middle/src/opt/mod.rs:215:24
[INFO] [stdout]     |
[INFO] [stdout] 215 |             Expr::Func(captures, arg, body) => {
[INFO] [stdout]     |                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_captures`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> middle/src/repr.rs:44:29
[INFO] [stdout]    |
[INFO] [stdout] 44 |             Entry::Occupied(data) => false,
[INFO] [stdout]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]   --> middle/src/lower.rs:68:22
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn to_mir(&self, ctx: &mut Context, hir: &HirContext, gen_tys: &[Repr]) -> Self::Output {
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hir`
[INFO] [stdout]   --> middle/src/lower.rs:68:41
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn to_mir(&self, ctx: &mut Context, hir: &HirContext, gen_tys: &[Repr]) -> Self::Output {
[INFO] [stdout]    |                                         ^^^ help: if this is intentional, prefix it with an underscore: `_hir`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `gen_tys`
[INFO] [stdout]   --> middle/src/lower.rs:68:59
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn to_mir(&self, ctx: &mut Context, hir: &HirContext, gen_tys: &[Repr]) -> Self::Output {
[INFO] [stdout]    |                                                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_gen_tys`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Not`
[INFO] [stdout]    --> middle/src/lower.rs:146:22
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     (Not, Prim(Bool)) => mir::Intrinsic::NotBool,
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_Not`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> middle/src/lower.rs:175:42
[INFO] [stdout]     |
[INFO] [stdout] 175 |                     (Join, List(x), List(y)) => mir::Intrinsic::Join(x.to_mir(ctx, hir, gen_tys)), // Assume x = y
[INFO] [stdout]     |                                          ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `captures`
[INFO] [stdout]    --> middle/src/opt/const_fold.rs:181:28
[INFO] [stdout]     |
[INFO] [stdout] 181 |                 Expr::Func(captures, arg, body) => {
[INFO] [stdout]     |                            ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_captures`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> middle/src/opt/const_fold.rs:190:31
[INFO] [stdout]     |
[INFO] [stdout] 190 |                 Expr::Variant(variant, inner) => {
[INFO] [stdout]     |                               ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variant`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> middle/src/opt/const_fold.rs:197:44
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 Expr::AccessVariant(inner, variant) => {
[INFO] [stdout]     |                                            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variant`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `field`
[INFO] [stdout]   --> middle/src/opt/flatten_single_field.rs:28:41
[INFO] [stdout]    |
[INFO] [stdout] 28 |                     Expr::Access(tuple, field) => if let Repr::Tuple(fields) = &tuple.meta().1 {
[INFO] [stdout]    |                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_field`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op`
[INFO] [stdout]   --> middle/src/opt/remove_unused_bindings.rs:25:33
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 Expr::Intrinsic(op, args) => {
[INFO] [stdout]    |                                 ^^ help: if this is intentional, prefix it with an underscore: `_op`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `check_binding`
[INFO] [stdout]    --> middle/src/opt/mod.rs:300:8
[INFO] [stdout]     |
[INFO] [stdout] 300 |     fn check_binding(ctx: &Context, binding: &Binding, repr: &Repr, stack: &mut Vec<(Ident, Repr)>) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `check_expr`
[INFO] [stdout]    --> middle/src/opt/mod.rs:308:8
[INFO] [stdout]     |
[INFO] [stdout] 308 |     fn check_expr(ctx: &Context, expr: &Expr, repr: &Repr, stack: &mut Vec<(Ident, Repr)>) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `visit_expr`
[INFO] [stdout]    --> middle/src/opt/mod.rs:328:8
[INFO] [stdout]     |
[INFO] [stdout] 328 |     fn visit_expr(ctx: &Context, expr: &MirNode<Expr>, stack: &mut Vec<(Ident, Repr)>) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Not` should have a snake case name
[INFO] [stdout]    --> middle/src/lower.rs:146:22
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     (Not, Prim(Bool)) => mir::Intrinsic::NotBool,
[INFO] [stdout]     |                      ^^^ help: convert the identifier to snake case: `not`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0170]: pattern binding `Not` is named the same as one of the variants of the type `UnaryOp`
[INFO] [stdout]    --> middle/src/lower.rs:146:22
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     (Not, Prim(Bool)) => mir::Intrinsic::NotBool,
[INFO] [stdout]     |                      ^^^ help: to match on the variant, qualify the path: `UnaryOp::Not`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bindings_with_variant_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]   --> middle/src/error.rs:12:50
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn write<C: ariadne::Cache<SrcId>>(self, ctx: &Context, cache: C, writer: impl Write) {
[INFO] [stdout]    |                                                  ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> middle/src/opt/mod.rs:299:14
[INFO] [stdout]     |
[INFO] [stdout] 299 | pub fn check(ctx: &Context) {
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]    --> middle/src/opt/mod.rs:300:22
[INFO] [stdout]     |
[INFO] [stdout] 300 |     fn check_binding(ctx: &Context, binding: &Binding, repr: &Repr, stack: &mut Vec<(Ident, Repr)>) {
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> middle/src/opt/mod.rs:300:69
[INFO] [stdout]     |
[INFO] [stdout] 300 |     fn check_binding(ctx: &Context, binding: &Binding, repr: &Repr, stack: &mut Vec<(Ident, Repr)>) {
[INFO] [stdout]     |                                                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `repr`
[INFO] [stdout]    --> middle/src/opt/mod.rs:317:39
[INFO] [stdout]     |
[INFO] [stdout] 317 |             (Expr::Match(pred, arms), repr) => {
[INFO] [stdout]     |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_repr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `body`
[INFO] [stdout]    --> middle/src/opt/mod.rs:318:27
[INFO] [stdout]     |
[INFO] [stdout] 318 |                 for (arm, body) in arms {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_body`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `captures`
[INFO] [stdout]    --> middle/src/opt/mod.rs:215:24
[INFO] [stdout]     |
[INFO] [stdout] 215 |             Expr::Func(captures, arg, body) => {
[INFO] [stdout]     |                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_captures`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> middle/src/repr.rs:44:29
[INFO] [stdout]    |
[INFO] [stdout] 44 |             Entry::Occupied(data) => false,
[INFO] [stdout]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ctx`
[INFO] [stdout]   --> middle/src/lower.rs:68:22
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn to_mir(&self, ctx: &mut Context, hir: &HirContext, gen_tys: &[Repr]) -> Self::Output {
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hir`
[INFO] [stdout]   --> middle/src/lower.rs:68:41
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn to_mir(&self, ctx: &mut Context, hir: &HirContext, gen_tys: &[Repr]) -> Self::Output {
[INFO] [stdout]    |                                         ^^^ help: if this is intentional, prefix it with an underscore: `_hir`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `gen_tys`
[INFO] [stdout]   --> middle/src/lower.rs:68:59
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn to_mir(&self, ctx: &mut Context, hir: &HirContext, gen_tys: &[Repr]) -> Self::Output {
[INFO] [stdout]    |                                                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_gen_tys`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Not`
[INFO] [stdout]    --> middle/src/lower.rs:146:22
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     (Not, Prim(Bool)) => mir::Intrinsic::NotBool,
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_Not`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> middle/src/lower.rs:175:42
[INFO] [stdout]     |
[INFO] [stdout] 175 |                     (Join, List(x), List(y)) => mir::Intrinsic::Join(x.to_mir(ctx, hir, gen_tys)), // Assume x = y
[INFO] [stdout]     |                                          ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `captures`
[INFO] [stdout]    --> middle/src/opt/const_fold.rs:181:28
[INFO] [stdout]     |
[INFO] [stdout] 181 |                 Expr::Func(captures, arg, body) => {
[INFO] [stdout]     |                            ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_captures`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> middle/src/opt/const_fold.rs:190:31
[INFO] [stdout]     |
[INFO] [stdout] 190 |                 Expr::Variant(variant, inner) => {
[INFO] [stdout]     |                               ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variant`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> middle/src/opt/const_fold.rs:197:44
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 Expr::AccessVariant(inner, variant) => {
[INFO] [stdout]     |                                            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variant`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `field`
[INFO] [stdout]   --> middle/src/opt/flatten_single_field.rs:28:41
[INFO] [stdout]    |
[INFO] [stdout] 28 |                     Expr::Access(tuple, field) => if let Repr::Tuple(fields) = &tuple.meta().1 {
[INFO] [stdout]    |                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_field`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op`
[INFO] [stdout]   --> middle/src/opt/remove_unused_bindings.rs:25:33
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 Expr::Intrinsic(op, args) => {
[INFO] [stdout]    |                                 ^^ help: if this is intentional, prefix it with an underscore: `_op`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0170`.
[INFO] [stdout] 
[INFO] [stderr]     Checking tao_vm v0.1.0 (/opt/rustwide/workdir/vm)
[INFO] [stdout] warning: function is never used: `check_binding`
[INFO] [stdout]    --> middle/src/opt/mod.rs:300:8
[INFO] [stdout]     |
[INFO] [stdout] 300 |     fn check_binding(ctx: &Context, binding: &Binding, repr: &Repr, stack: &mut Vec<(Ident, Repr)>) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `check_expr`
[INFO] [stdout]    --> middle/src/opt/mod.rs:308:8
[INFO] [stdout]     |
[INFO] [stdout] 308 |     fn check_expr(ctx: &Context, expr: &Expr, repr: &Repr, stack: &mut Vec<(Ident, Repr)>) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `visit_expr`
[INFO] [stdout]    --> middle/src/opt/mod.rs:328:8
[INFO] [stdout]     |
[INFO] [stdout] 328 |     fn visit_expr(ctx: &Context, expr: &MirNode<Expr>, stack: &mut Vec<(Ident, Repr)>) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Not` should have a snake case name
[INFO] [stdout]    --> middle/src/lower.rs:146:22
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     (Not, Prim(Bool)) => mir::Intrinsic::NotBool,
[INFO] [stdout]     |                      ^^^ help: convert the identifier to snake case: `not`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0170`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tail`
[INFO] [stdout]   --> vm/src/lower.rs:57:29
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 if let Some(tail) = tail.as_ref() {
[INFO] [stdout]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_tail`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tail`
[INFO] [stdout]   --> vm/src/lower.rs:57:29
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 if let Some(tail) = tail.as_ref() {
[INFO] [stdout]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_tail`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tao v0.1.0 (/opt/rustwide/workdir/compiler)
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]    --> syntax/src/parse.rs:508:36
[INFO] [stdout]     |
[INFO] [stdout] 508 |                 Chain::Apply(None, span) => SrcNode::new(ast::Expr::Error, expr.span()),
[INFO] [stdout]     |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 51.25s
[INFO] running `Command { std: "docker" "inspect" "af8109bcc7ee0c016003c9b0562584092326af721ea016fa43dd57978aee1e27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af8109bcc7ee0c016003c9b0562584092326af721ea016fa43dd57978aee1e27", kill_on_drop: false }`
[INFO] [stdout] af8109bcc7ee0c016003c9b0562584092326af721ea016fa43dd57978aee1e27