[INFO] cloning repository https://github.com/eyelash/superscript
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eyelash/superscript" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feyelash%2Fsuperscript", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feyelash%2Fsuperscript'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 136dc3bdf197af4fde218546c12b1ff16c9ad1ad
[INFO] building eyelash/superscript against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feyelash%2Fsuperscript" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/eyelash/superscript on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/eyelash/superscript
[INFO] finished tweaking git repo https://github.com/eyelash/superscript
[INFO] tweaked toml for git repo https://github.com/eyelash/superscript written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/eyelash/superscript 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0afde03e853a1ff89377f4ded84354af15152338bf968d3f59e1de9deb88fda3
[INFO] running `Command { std: "docker" "start" "-a" "0afde03e853a1ff89377f4ded84354af15152338bf968d3f59e1de9deb88fda3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0afde03e853a1ff89377f4ded84354af15152338bf968d3f59e1de9deb88fda3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0afde03e853a1ff89377f4ded84354af15152338bf968d3f59e1de9deb88fda3", kill_on_drop: false }`
[INFO] [stdout] 0afde03e853a1ff89377f4ded84354af15152338bf968d3f59e1de9deb88fda3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3cee5f159b337c7a9b932f2992df6314df2ca36b9429920648ad5f7949ac57ea
[INFO] running `Command { std: "docker" "start" "-a" "3cee5f159b337c7a9b932f2992df6314df2ca36b9429920648ad5f7949ac57ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling superscript v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition: `choice`
[INFO] [stdout]    --> src/parser.rs:163:14
[INFO] [stdout]     |
[INFO] [stdout] 163 | macro_rules! choice {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/type_checker.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Location`
[INFO] [stdout]  --> src/type_checker.rs:3:27
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::error::{Error, Location};
[INFO] [stdout]   |                           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ParseResult`, `choice`, and `optional`
[INFO] [stdout]   --> src/main.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 | use parser::{Parse, optional, repeat, not, peek, sequence, choice, ParseResult};
[INFO] [stdout]    |                     ^^^^^^^^                               ^^^^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/printer.rs:86:51
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn indented<F: FnOnce(&mut Self)>(&mut self, mut f: F) {
[INFO] [stdout]    |                                                      ----^
[INFO] [stdout]    |                                                      |
[INFO] [stdout]    |                                                      help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/type_checker.rs:88:10
[INFO] [stdout]    |
[INFO] [stdout] 88 |         Number(s) => Ok(Type::Number),
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/codegen/js.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |         for (name, ty) in &class.fields {
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ty`
[INFO] [stdout]   --> src/codegen/js.rs:27:14
[INFO] [stdout]    |
[INFO] [stdout] 27 |         for (name, ty) in &class.fields {
[INFO] [stdout]    |                    ^^ help: if this is intentional, prefix it with an underscore: `_ty`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:77:32
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn parse<P: Parse>(&mut self, mut p: P) -> Result<(&'a str, Location), Error> {
[INFO] [stdout]    |                                   ----^
[INFO] [stdout]    |                                   |
[INFO] [stdout]    |                                   help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: relative drop order changing in Rust 2024
[INFO] [stdout]   --> src/printer.rs:49:24
[INFO] [stdout]    |
[INFO] [stdout] 49 |             while let Some(d) = i.next() {
[INFO] [stdout]    |                            -    ^^^^^^^^
[INFO] [stdout]    |                            |    |
[INFO] [stdout]    |                            |    this value will be stored in a temporary; let us call it `#1`
[INFO] [stdout]    |                            |    up until Edition 2021 `#1` is dropped last but will be dropped earlier in Edition 2024
[INFO] [stdout]    |                            `d` calls a custom destructor
[INFO] [stdout]    |                            `d` will be dropped later as of Edition 2024
[INFO] [stdout] 50 |                 write!(f, ", {}", d)?;
[INFO] [stdout] 51 |             }
[INFO] [stdout]    |             - now the temporary value is dropped here, before the local variables in the block or statement
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/temporary-tail-expr-scope.html>
[INFO] [stdout]    = note: most of the time, changing drop order is harmless; inspect the `impl Drop`s for side effects like releasing locks or sending messages
[INFO] [stdout]    = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `UnaryPostfix` is never constructed
[INFO] [stdout]   --> src/main.rs:18:2
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum OperatorLevel {
[INFO] [stdout]    |      ------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 18 |     UnaryPostfix(&'static [UnaryOperator]),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Optional` is never constructed
[INFO] [stdout]   --> src/parser.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct Optional<P>(P);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `optional` is never used
[INFO] [stdout]   --> src/parser.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn optional<P: Parse>(p: P) -> impl Parse {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FunctionParser` is never constructed
[INFO] [stdout]    --> src/parser.rs:106:8
[INFO] [stdout]     |
[INFO] [stdout] 106 | struct FunctionParser<F>(F);
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `from_function` is never used
[INFO] [stdout]    --> src/parser.rs:118:8
[INFO] [stdout]     |
[INFO] [stdout] 118 | pub fn from_function<F: Fn(&mut Cursor) -> Option<()>>(f: F) -> impl Parse {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Choice` is never constructed
[INFO] [stdout]    --> src/parser.rs:146:8
[INFO] [stdout]     |
[INFO] [stdout] 146 | struct Choice<P0, P1>(P0, P1);
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `choice0` is never used
[INFO] [stdout]    --> src/parser.rs:160:8
[INFO] [stdout]     |
[INFO] [stdout] 160 | pub fn choice0<P0: Parse, P1: Parse>(p0: P0, p1: P1) -> impl Parse {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse` is never used
[INFO] [stdout]    --> src/parser.rs:173:8
[INFO] [stdout]     |
[INFO] [stdout] 173 | pub fn parse<'a, P: Parse>(mut p: P, s: &'a str) -> Option<(&'a str, &'a str)> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_error_message` is never used
[INFO] [stdout]    --> src/parser.rs:219:5
[INFO] [stdout]     |
[INFO] [stdout] 218 | pub trait ParseResult {
[INFO] [stdout]     |           ----------- method in this trait
[INFO] [stdout] 219 |     fn set_error_message<S: Into<String>>(self, msg: S) -> Self;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `increase_indentation` and `decrease_indentation` are never used
[INFO] [stdout]   --> src/printer.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl<W: std::io::Write> Printer<W> {
[INFO] [stdout]    | ---------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn increase_indentation(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83 |     pub fn decrease_indentation(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_main_function` is never used
[INFO] [stdout]   --> src/ast.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl <'a> Program<'a> {
[INFO] [stdout]    | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn get_main_function(&self) -> Option<&Function<'a>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_constructor` is never used
[INFO] [stdout]   --> src/ast.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl <'a> Class<'a> {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub fn get_constructor(&self) -> Option<&Function<'a>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:15:2
[INFO] [stdout]    |
[INFO] [stdout] 15 |     printer.println(format_args!("function {}({}) {{", function.name, comma_separated(arguments)));
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let _ = printer.println(format_args!("function {}({}) {{", function.name, comma_separated(arguments)));
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:21:2
[INFO] [stdout]    |
[INFO] [stdout] 21 |     printer.println("}");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let _ = printer.println("}");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:25:2
[INFO] [stdout]    |
[INFO] [stdout] 25 |     printer.println(format_args!("class {} {{", class.name));
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let _ = printer.println(format_args!("class {} {{", class.name));
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:34:2
[INFO] [stdout]    |
[INFO] [stdout] 34 |     printer.println("}");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let _ = printer.println("}");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:39:2
[INFO] [stdout]    |
[INFO] [stdout] 39 |     printer.println(format_args!("{}({}) {{", function.name, comma_separated(arguments)));
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let _ = printer.println(format_args!("{}({}) {{", function.name, comma_separated(arguments)));
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:45:2
[INFO] [stdout]    |
[INFO] [stdout] 45 |     printer.println("}");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let _ = printer.println("}");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 |             printer.println(format_args!("let {} = {};", name, DisplayExpression(expression)));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 51 |             let _ = printer.println(format_args!("let {} = {};", name, DisplayExpression(expression)));
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 |             printer.println(format_args!("if ({})", DisplayExpression(condition)));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 54 |             let _ = printer.println(format_args!("if ({})", DisplayExpression(condition)));
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 printer.println("else");
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 let _ = printer.println("else");
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 |             printer.println(format_args!("while ({})", DisplayExpression(condition)));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 62 |             let _ = printer.println(format_args!("while ({})", DisplayExpression(condition)));
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 |             printer.println(format_args!("return {};", DisplayExpression(expression)));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 66 |             let _ = printer.println(format_args!("return {};", DisplayExpression(expression)));
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 |             printer.println(format_args!("{};", DisplayExpression(expression)));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 69 |             let _ = printer.println(format_args!("{};", DisplayExpression(expression)));
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 |             printer.println('{');
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 72 |             let _ = printer.println('{');
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/codegen/js.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 |             printer.println('}');
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 78 |             let _ = printer.println('}');
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `superscript` (bin "superscript") due to 1 previous error; 35 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "3cee5f159b337c7a9b932f2992df6314df2ca36b9429920648ad5f7949ac57ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cee5f159b337c7a9b932f2992df6314df2ca36b9429920648ad5f7949ac57ea", kill_on_drop: false }`
[INFO] [stdout] 3cee5f159b337c7a9b932f2992df6314df2ca36b9429920648ad5f7949ac57ea