[INFO] cloning repository https://github.com/brson/piddle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brson/piddle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrson%2Fpiddle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrson%2Fpiddle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 740fc3718248a4cfc59df356c26209eb5f321494
[INFO] checking brson/piddle against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrson%2Fpiddle" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/brson/piddle
[INFO] finished tweaking git repo https://github.com/brson/piddle
[INFO] tweaked toml for git repo https://github.com/brson/piddle written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/brson/piddle on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/brson/piddle already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7f2050021315b8b6f4e77abcc88d5ce71969f65482238d3480f948325113a81
[INFO] running `Command { std: "docker" "start" "-a" "a7f2050021315b8b6f4e77abcc88d5ce71969f65482238d3480f948325113a81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7f2050021315b8b6f4e77abcc88d5ce71969f65482238d3480f948325113a81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7f2050021315b8b6f4e77abcc88d5ce71969f65482238d3480f948325113a81", kill_on_drop: false }`
[INFO] [stdout] a7f2050021315b8b6f4e77abcc88d5ce71969f65482238d3480f948325113a81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01cc19e1918c2b87416e69cc16cd83ffe33928a94bd5782cac791b021a61f9f0
[INFO] running `Command { std: "docker" "start" "-a" "01cc19e1918c2b87416e69cc16cd83ffe33928a94bd5782cac791b021a61f9f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling minimal-lexical v0.1.2
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking endian-type v0.1.2
[INFO] [stderr]    Compiling anyhow v1.0.43
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]     Checking nibble_vec v0.1.0
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling nom v7.0.0
[INFO] [stderr]     Checking radix_trie v0.2.1
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking getrandom v0.2.3
[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 v0.22.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking hecs v0.6.4
[INFO] [stderr]     Checking string-interner v0.13.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking structopt v0.3.22
[INFO] [stderr]     Checking rustyline v9.0.0
[INFO] [stderr]     Checking piddle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, RunError>, Evaluation>
[INFO] [stdout]    --> src/main.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 196 |     Ok(interpreter::run_expression(env, &tables, expr)?)
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/main.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 196 |     Ok(interpreter::run_expression(env, &tables, expr)?)
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |                 drop(from_module_ctxt);
[INFO] [stdout]     |                 ^^^^^----------------^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 140 -                 drop(from_module_ctxt);
[INFO] [stdout] 140 +                 let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:166:5
[INFO] [stdout]     |
[INFO] [stdout] 166 |     drop(from_module_ctxt);
[INFO] [stdout]     |     ^^^^^----------------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 166 -     drop(from_module_ctxt);
[INFO] [stdout] 166 +     let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |                 drop(from_module_ctxt);
[INFO] [stdout]     |                 ^^^^^----------------^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 173 -                 drop(from_module_ctxt);
[INFO] [stdout] 173 +                 let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:202:9
[INFO] [stdout]     |
[INFO] [stdout] 202 |         drop(module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 202 -         drop(module_ctxt);
[INFO] [stdout] 202 +         let _ = module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:224:9
[INFO] [stdout]     |
[INFO] [stdout] 224 |         drop(module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 224 -         drop(module_ctxt);
[INFO] [stdout] 224 +         let _ = module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:231:13
[INFO] [stdout]     |
[INFO] [stdout] 231 |             drop(other_module_ctxt);
[INFO] [stdout]     |             ^^^^^-----------------^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 231 -             drop(other_module_ctxt);
[INFO] [stdout] 231 +             let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         drop(other_module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 246 -         drop(other_module_ctxt);
[INFO] [stdout] 246 +         let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:261:9
[INFO] [stdout]     |
[INFO] [stdout] 261 |         drop(other_module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 261 -         drop(other_module_ctxt);
[INFO] [stdout] 261 +         let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:35:129
[INFO] [stdout]     |
[INFO] [stdout]  35 |   pub fn run_expression<Context>(env: &mut Environment, tables: &Tables<'_, Context>, expr: Code) -> Result<Evaluation, RunError> {
[INFO] [stdout]     |  _________________________________________________________________________________________________________________________________^
[INFO] [stdout]  36 | |     match expr {
[INFO] [stdout]  37 | |         Code::Nop => Ok(Evaluation::Nil),
[INFO] [stdout]  38 | |         Code::Clear => Ok(Evaluation::Nil),
[INFO] [stdout] ...   |
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:36:5
[INFO] [stdout]     |
[INFO] [stdout]  36 | /     match expr {
[INFO] [stdout]  37 | |         Code::Nop => Ok(Evaluation::Nil),
[INFO] [stdout]  38 | |         Code::Clear => Ok(Evaluation::Nil),
[INFO] [stdout]  39 | |         Code::Dump => {
[INFO] [stdout] ...   |
[INFO] [stdout] 112 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:37:22
[INFO] [stdout]    |
[INFO] [stdout] 37 |         Code::Nop => Ok(Evaluation::Nil),
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:38:24
[INFO] [stdout]    |
[INFO] [stdout] 38 |         Code::Clear => Ok(Evaluation::Nil),
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:39:23
[INFO] [stdout]    |
[INFO] [stdout] 39 |           Code::Dump => {
[INFO] [stdout]    |  _______________________^
[INFO] [stdout] 40 | |             (tables.dump)();
[INFO] [stdout] 41 | |             println!("# runtime");
[INFO] [stdout] 42 | |             println!("## values");
[INFO] [stdout] ...  |
[INFO] [stdout] 46 | |             Ok(Evaluation::Nil)
[INFO] [stdout] 47 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             Ok(Evaluation::Nil)
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:48:43
[INFO] [stdout]    |
[INFO] [stdout] 48 |         Code::IntrinsicLiteralInt32(i) => Ok(Evaluation::IntrinsicInt32(i)),
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:49:54
[INFO] [stdout]    |
[INFO] [stdout] 49 |           Code::IntrinsicCallInt32WrappingAdd(a, b) => {
[INFO] [stdout]    |  ______________________________________________________^
[INFO] [stdout] 50 | |             let eval_a = env.values.remove(&a).expect("eval");
[INFO] [stdout] 51 | |             let eval_b = env.values.remove(&b).expect("eval");
[INFO] [stdout] 52 | |             let val_a = match eval_a {
[INFO] [stdout] ...  |
[INFO] [stdout] 61 | |             Ok(Evaluation::IntrinsicInt32(res))
[INFO] [stdout] 62 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |             Ok(Evaluation::IntrinsicInt32(res))
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:63:34
[INFO] [stdout]    |
[INFO] [stdout] 63 |           Code::Set(name, code) => {
[INFO] [stdout]    |  __________________________________^
[INFO] [stdout] 64 | |             let eval = run_expression(env, tables, *code)?;
[INFO] [stdout] 65 | |             env.values.insert(name, eval);
[INFO] [stdout] 66 | |             Ok(Evaluation::Nil)
[INFO] [stdout] 67 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, RunError>, Evaluation>
[INFO] [stdout]   --> src/interpreter.rs:64:24
[INFO] [stdout]    |
[INFO] [stdout] 64 |             let eval = run_expression(env, tables, *code)?;
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:64:24
[INFO] [stdout]    |
[INFO] [stdout] 64 |             let eval = run_expression(env, tables, *code)?;
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:64:24
[INFO] [stdout]    |
[INFO] [stdout] 64 |             let eval = run_expression(env, tables, *code)?;
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 |             Ok(Evaluation::Nil)
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:68:34
[INFO] [stdout]    |
[INFO] [stdout] 68 |           Code::PopArg { name } => {
[INFO] [stdout]    |  __________________________________^
[INFO] [stdout] 69 | |             let eval = env.args.pop().expect("pop arg");
[INFO] [stdout] 70 | |             env.values.insert(name, eval);
[INFO] [stdout] 71 | |             Ok(Evaluation::Nil)
[INFO] [stdout] 72 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             Ok(Evaluation::Nil)
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:73:29
[INFO] [stdout]    |
[INFO] [stdout] 73 |           Code::Read(name) => {
[INFO] [stdout]    |  _____________________________^
[INFO] [stdout] 74 | |             let eval = if let Some(eval) = env.values.get(&name) {
[INFO] [stdout] 75 | |                 eval
[INFO] [stdout] 76 | |             } else {
[INFO] [stdout] ...  |
[INFO] [stdout] 80 | |             Ok(eval)
[INFO] [stdout] 81 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |             Ok(eval)
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:82:38
[INFO] [stdout]     |
[INFO] [stdout]  82 |           Code::Call { name, args } => {
[INFO] [stdout]     |  ______________________________________^
[INFO] [stdout]  83 | |             let mut eval_args = vec![];
[INFO] [stdout]  84 | |             for arg in args {
[INFO] [stdout]  85 | |                 let eval = run_expression(env, tables, arg)?;
[INFO] [stdout] ...   |
[INFO] [stdout] 100 | |             Ok(final_eval)
[INFO] [stdout] 101 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, RunError>, Evaluation>
[INFO] [stdout]   --> src/interpreter.rs:85:28
[INFO] [stdout]    |
[INFO] [stdout] 85 |                 let eval = run_expression(env, tables, arg)?;
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:85:28
[INFO] [stdout]    |
[INFO] [stdout] 85 |                 let eval = run_expression(env, tables, arg)?;
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:85:28
[INFO] [stdout]    |
[INFO] [stdout] 85 |                 let eval = run_expression(env, tables, arg)?;
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, RunError>, Evaluation>
[INFO] [stdout]   --> src/interpreter.rs:98:30
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 final_eval = run_expression(&mut env, &tables, code)?;
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:98:30
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 final_eval = run_expression(&mut env, &tables, code)?;
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:98:30
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 final_eval = run_expression(&mut env, &tables, code)?;
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:100:13
[INFO] [stdout]     |
[INFO] [stdout] 100 |             Ok(final_eval)
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:102:39
[INFO] [stdout]     |
[INFO] [stdout] 102 |           Code::Composite { fields } => {
[INFO] [stdout]     |  _______________________________________^
[INFO] [stdout] 103 | |             let mut evals = vec![];
[INFO] [stdout] 104 | |             for field in fields {
[INFO] [stdout] 105 | |                 let eval = run_expression(env, &tables, *field.1)?;
[INFO] [stdout] ...   |
[INFO] [stdout] 110 | |             })
[INFO] [stdout] 111 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, RunError>, Evaluation>
[INFO] [stdout]    --> src/interpreter.rs:105:28
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 let eval = run_expression(env, &tables, *field.1)?;
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:105:28
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 let eval = run_expression(env, &tables, *field.1)?;
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:105:28
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 let eval = run_expression(env, &tables, *field.1)?;
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 | /             Ok(Evaluation::Composite {
[INFO] [stdout] 109 | |                 fields: evals
[INFO] [stdout] 110 | |             })
[INFO] [stdout]     | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `piddle` (bin "piddle") due to 33 previous errors; 8 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, RunError>, Evaluation>
[INFO] [stdout]    --> src/main.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 196 |     Ok(interpreter::run_expression(env, &tables, expr)?)
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/main.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 196 |     Ok(interpreter::run_expression(env, &tables, expr)?)
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |                 drop(from_module_ctxt);
[INFO] [stdout]     |                 ^^^^^----------------^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 140 -                 drop(from_module_ctxt);
[INFO] [stdout] 140 +                 let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:166:5
[INFO] [stdout]     |
[INFO] [stdout] 166 |     drop(from_module_ctxt);
[INFO] [stdout]     |     ^^^^^----------------^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 166 -     drop(from_module_ctxt);
[INFO] [stdout] 166 +     let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |                 drop(from_module_ctxt);
[INFO] [stdout]     |                 ^^^^^----------------^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 173 -                 drop(from_module_ctxt);
[INFO] [stdout] 173 +                 let _ = from_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:202:9
[INFO] [stdout]     |
[INFO] [stdout] 202 |         drop(module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 202 -         drop(module_ctxt);
[INFO] [stdout] 202 +         let _ = module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:224:9
[INFO] [stdout]     |
[INFO] [stdout] 224 |         drop(module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 224 -         drop(module_ctxt);
[INFO] [stdout] 224 +         let _ = module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:231:13
[INFO] [stdout]     |
[INFO] [stdout] 231 |             drop(other_module_ctxt);
[INFO] [stdout]     |             ^^^^^-----------------^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 231 -             drop(other_module_ctxt);
[INFO] [stdout] 231 +             let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         drop(other_module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 246 -         drop(other_module_ctxt);
[INFO] [stdout] 246 +         let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/compiler.rs:261:9
[INFO] [stdout]     |
[INFO] [stdout] 261 |         drop(other_module_ctxt);
[INFO] [stdout]     |         ^^^^^-----------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut ModuleContext`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 261 -         drop(other_module_ctxt);
[INFO] [stdout] 261 +         let _ = other_module_ctxt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:35:129
[INFO] [stdout]     |
[INFO] [stdout]  35 |   pub fn run_expression<Context>(env: &mut Environment, tables: &Tables<'_, Context>, expr: Code) -> Result<Evaluation, RunError> {
[INFO] [stdout]     |  _________________________________________________________________________________________________________________________________^
[INFO] [stdout]  36 | |     match expr {
[INFO] [stdout]  37 | |         Code::Nop => Ok(Evaluation::Nil),
[INFO] [stdout]  38 | |         Code::Clear => Ok(Evaluation::Nil),
[INFO] [stdout] ...   |
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:36:5
[INFO] [stdout]     |
[INFO] [stdout]  36 | /     match expr {
[INFO] [stdout]  37 | |         Code::Nop => Ok(Evaluation::Nil),
[INFO] [stdout]  38 | |         Code::Clear => Ok(Evaluation::Nil),
[INFO] [stdout]  39 | |         Code::Dump => {
[INFO] [stdout] ...   |
[INFO] [stdout] 112 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:37:22
[INFO] [stdout]    |
[INFO] [stdout] 37 |         Code::Nop => Ok(Evaluation::Nil),
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:38:24
[INFO] [stdout]    |
[INFO] [stdout] 38 |         Code::Clear => Ok(Evaluation::Nil),
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:39:23
[INFO] [stdout]    |
[INFO] [stdout] 39 |           Code::Dump => {
[INFO] [stdout]    |  _______________________^
[INFO] [stdout] 40 | |             (tables.dump)();
[INFO] [stdout] 41 | |             println!("# runtime");
[INFO] [stdout] 42 | |             println!("## values");
[INFO] [stdout] ...  |
[INFO] [stdout] 46 | |             Ok(Evaluation::Nil)
[INFO] [stdout] 47 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             Ok(Evaluation::Nil)
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:48:43
[INFO] [stdout]    |
[INFO] [stdout] 48 |         Code::IntrinsicLiteralInt32(i) => Ok(Evaluation::IntrinsicInt32(i)),
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:49:54
[INFO] [stdout]    |
[INFO] [stdout] 49 |           Code::IntrinsicCallInt32WrappingAdd(a, b) => {
[INFO] [stdout]    |  ______________________________________________________^
[INFO] [stdout] 50 | |             let eval_a = env.values.remove(&a).expect("eval");
[INFO] [stdout] 51 | |             let eval_b = env.values.remove(&b).expect("eval");
[INFO] [stdout] 52 | |             let val_a = match eval_a {
[INFO] [stdout] ...  |
[INFO] [stdout] 61 | |             Ok(Evaluation::IntrinsicInt32(res))
[INFO] [stdout] 62 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |             Ok(Evaluation::IntrinsicInt32(res))
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:63:34
[INFO] [stdout]    |
[INFO] [stdout] 63 |           Code::Set(name, code) => {
[INFO] [stdout]    |  __________________________________^
[INFO] [stdout] 64 | |             let eval = run_expression(env, tables, *code)?;
[INFO] [stdout] 65 | |             env.values.insert(name, eval);
[INFO] [stdout] 66 | |             Ok(Evaluation::Nil)
[INFO] [stdout] 67 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, RunError>, Evaluation>
[INFO] [stdout]   --> src/interpreter.rs:64:24
[INFO] [stdout]    |
[INFO] [stdout] 64 |             let eval = run_expression(env, tables, *code)?;
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:64:24
[INFO] [stdout]    |
[INFO] [stdout] 64 |             let eval = run_expression(env, tables, *code)?;
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:64:24
[INFO] [stdout]    |
[INFO] [stdout] 64 |             let eval = run_expression(env, tables, *code)?;
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 |             Ok(Evaluation::Nil)
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:68:34
[INFO] [stdout]    |
[INFO] [stdout] 68 |           Code::PopArg { name } => {
[INFO] [stdout]    |  __________________________________^
[INFO] [stdout] 69 | |             let eval = env.args.pop().expect("pop arg");
[INFO] [stdout] 70 | |             env.values.insert(name, eval);
[INFO] [stdout] 71 | |             Ok(Evaluation::Nil)
[INFO] [stdout] 72 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             Ok(Evaluation::Nil)
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:73:29
[INFO] [stdout]    |
[INFO] [stdout] 73 |           Code::Read(name) => {
[INFO] [stdout]    |  _____________________________^
[INFO] [stdout] 74 | |             let eval = if let Some(eval) = env.values.get(&name) {
[INFO] [stdout] 75 | |                 eval
[INFO] [stdout] 76 | |             } else {
[INFO] [stdout] ...  |
[INFO] [stdout] 80 | |             Ok(eval)
[INFO] [stdout] 81 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |             Ok(eval)
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:82:38
[INFO] [stdout]     |
[INFO] [stdout]  82 |           Code::Call { name, args } => {
[INFO] [stdout]     |  ______________________________________^
[INFO] [stdout]  83 | |             let mut eval_args = vec![];
[INFO] [stdout]  84 | |             for arg in args {
[INFO] [stdout]  85 | |                 let eval = run_expression(env, tables, arg)?;
[INFO] [stdout] ...   |
[INFO] [stdout] 100 | |             Ok(final_eval)
[INFO] [stdout] 101 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, RunError>, Evaluation>
[INFO] [stdout]   --> src/interpreter.rs:85:28
[INFO] [stdout]    |
[INFO] [stdout] 85 |                 let eval = run_expression(env, tables, arg)?;
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:85:28
[INFO] [stdout]    |
[INFO] [stdout] 85 |                 let eval = run_expression(env, tables, arg)?;
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:85:28
[INFO] [stdout]    |
[INFO] [stdout] 85 |                 let eval = run_expression(env, tables, arg)?;
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, RunError>, Evaluation>
[INFO] [stdout]   --> src/interpreter.rs:98:30
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 final_eval = run_expression(&mut env, &tables, code)?;
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:98:30
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 final_eval = run_expression(&mut env, &tables, code)?;
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]   --> src/interpreter.rs:98:30
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 final_eval = run_expression(&mut env, &tables, code)?;
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:100:13
[INFO] [stdout]     |
[INFO] [stdout] 100 |             Ok(final_eval)
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:102:39
[INFO] [stdout]     |
[INFO] [stdout] 102 |           Code::Composite { fields } => {
[INFO] [stdout]     |  _______________________________________^
[INFO] [stdout] 103 | |             let mut evals = vec![];
[INFO] [stdout] 104 | |             for field in fields {
[INFO] [stdout] 105 | |                 let eval = run_expression(env, &tables, *field.1)?;
[INFO] [stdout] ...   |
[INFO] [stdout] 110 | |             })
[INFO] [stdout] 111 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, RunError>, Evaluation>
[INFO] [stdout]    --> src/interpreter.rs:105:28
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 let eval = run_expression(env, &tables, *field.1)?;
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:105:28
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 let eval = run_expression(env, &tables, *field.1)?;
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:105:28
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 let eval = run_expression(env, &tables, *field.1)?;
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Evaluation, RunError>
[INFO] [stdout]    --> src/interpreter.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 | /             Ok(Evaluation::Composite {
[INFO] [stdout] 109 | |                 fields: evals
[INFO] [stdout] 110 | |             })
[INFO] [stdout]     | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `piddle` (bin "piddle" test) due to 33 previous errors; 8 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "01cc19e1918c2b87416e69cc16cd83ffe33928a94bd5782cac791b021a61f9f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01cc19e1918c2b87416e69cc16cd83ffe33928a94bd5782cac791b021a61f9f0", kill_on_drop: false }`
[INFO] [stdout] 01cc19e1918c2b87416e69cc16cd83ffe33928a94bd5782cac791b021a61f9f0