The build is the audit.

Source

function total(price, qty) {
  return price * qty;
}

console.log(total("19", 3));

Transcript

57

bun specimen.js · 20 ms · exit 0

bun 1.3.14

Source

package main

import "fmt"

func total(price int, qty int) int {
	return price * qty
}

func main() {
	fmt.Println(total("19", 3))
}

Transcript

# specimen
./main.go:10:20: cannot use "19" (untyped string constant) as int value in argument to total

go build -o app . · 89 ms · exit 1

go version go1.27.1 linux/amd64

Source

fn total(price: i32, qty: i32) -> i32 {
    price * qty
}

fn main() {
    println!("{}", total("19", 3));
}

Transcript

error[E0308]: mismatched types
 --> specimen.rs:6:26
  |
6 |     println!("{}", total("19", 3));
  |                    ----- ^^^^ expected `i32`, found `&str`
  |                    |
  |                    arguments to this function are incorrect
  |
note: function defined here
 --> specimen.rs:1:4
  |
1 | fn total(price: i32, qty: i32) -> i32 {
  |    ^^^^^ ----------

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0308`.

rustc --edition 2021 -o app specimen.rs · 68 ms · exit 1

rustc 1.98.1 (48a229cea 2026-09-01)

Source

console.log("server up");
console.log(hallucinatedHelper());

Transcript

server up
1 | console.log("server up");
2 | console.log(hallucinatedHelper());
                ^
ReferenceError: hallucinatedHelper is not defined
      at <anonymous> (specimen.js:2:13)

Bun v1.3.14 (Linux x64)

bun specimen.js · 20 ms · exit 1

bun 1.3.14

Source

package main

import "fmt"

func main() {
	fmt.Println("server up")
	fmt.Println(hallucinatedHelper())
}

Transcript

# specimen
./main.go:7:14: undefined: hallucinatedHelper

go build -o app . · 81 ms · exit 1

go version go1.27.1 linux/amd64

Source

fn main() {
    println!("server up");
    println!("{}", hallucinated_helper());
}

Transcript

error[E0425]: cannot find function `hallucinated_helper` in this scope
 --> specimen.rs:3:20
  |
3 |     println!("{}", hallucinated_helper());
  |                    ^^^^^^^^^^^^^^^^^^^ not found in this scope

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0425`.

rustc --edition 2021 -o app specimen.rs · 68 ms · exit 1

rustc 1.98.1 (48a229cea 2026-09-01)

Source

const box = { value: 1 };
const left = box;
const right = box;
left.value += 1;
right.value += 1;
console.log(box.value);

Transcript

3

bun specimen.js · 19 ms · exit 0

bun 1.3.14

Source

package main

import "fmt"

func main() {
	n := 1
	left := &n
	right := &n
	*left += 1
	*right += 1
	fmt.Println(n)
}

Transcript

3

go build -o app . && ./app · 241 ms · exit 0

go version go1.27.1 linux/amd64

Source

fn main() {
    let mut n = 1;
    let left = &mut n;
    let right = &mut n;
    *left += 1;
    *right += 1;
    println!("{n}");
}

Transcript

error[E0499]: cannot borrow `n` as mutable more than once at a time
 --> specimen.rs:4:17
  |
3 |     let left = &mut n;
  |                ------ first mutable borrow occurs here
4 |     let right = &mut n;
  |                 ^^^^^^ second mutable borrow occurs here
5 |     *left += 1;
  |     ---------- first borrow later used here

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0499`.

rustc --edition 2021 -o app specimen.rs · 58 ms · exit 1

rustc 1.98.1 (48a229cea 2026-09-01)

Source

const draftTitle = "The Gate";
console.log("published");

Transcript

published

bun specimen.js · 21 ms · exit 0

bun 1.3.14

Source

package main

import "fmt"

func main() {
	draftTitle := "The Gate"
	fmt.Println("published")
}

Transcript

# specimen
./main.go:6:2: declared and not used: draftTitle

go build -o app . · 96 ms · exit 1

go version go1.27.1 linux/amd64

Source

fn main() {
    let draft_title = "The Gate";
    println!("published");
}

Transcript

warning: unused variable: `draft_title`
 --> specimen.rs:2:9
  |
2 |     let draft_title = "The Gate";
  |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_draft_title`
  |
  = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default

warning: 1 warning emitted

--- program ---
published

rustc --edition 2021 -o app specimen.rs && ./app · 119 ms · exit 0

rustc 1.98.1 (48a229cea 2026-09-01)

Source

function average(values) {
  let sum = 0;
  for (const value of values) {
    sum += value;
  }
  return Math.floor(sum / (values.length + 1));
}

console.log(average([10, 20, 30]));

Transcript

15

bun specimen.js · 21 ms · exit 0

bun 1.3.14

Source

package main

import "fmt"

func average(values []int) int {
	sum := 0
	for _, value := range values {
		sum += value
	}
	return sum / (len(values) + 1)
}

func main() {
	fmt.Println(average([]int{10, 20, 30}))
}

Transcript

15

go build -o app . && ./app · 250 ms · exit 0

go version go1.27.1 linux/amd64

Source

fn average(values: &[i32]) -> i32 {
    let mut sum = 0;
    for value in values {
        sum += value;
    }
    sum / (values.len() as i32 + 1)
}

fn main() {
    println!("{}", average(&[10, 20, 30]));
}

Transcript

15

rustc --edition 2021 -o app specimen.rs && ./app · 112 ms · exit 0

rustc 1.98.1 (48a229cea 2026-09-01)