occational segfaults on tests type error

[scarf005]

2023-09-11_19-42-31.mp4

segfaults around 22s

Reproduce

run with deno test --watch -A test.ts.

Code used

/**
 * Converts first heading into frontmatter.
 */

import { assertEquals } from "https://deno.land/std@0.201.0/assert/assert_equals.ts"
import * as frontmatter from "https://deno.land/std@0.201.0/front_matter/yaml.ts"
import { walk } from "https://deno.land/std@0.201.0/fs/walk.ts"
import { asynciter } from "https://deno.land/x/asynciter@0.0.18/mod.ts"

// const files = await asynciter(walk("doc/src/content", { exts: ["md"], includeDirs: false }))
//   .map(({ path }) => path)
//   .concurrentUnorderedMap(async (path) => ({ path, text: await Deno.readTextFile(path) }))
//   .filter(({ text }) => frontmatter.test(text))
//   .map()
//   .collect()

// console.log(files)

const input = /*md*/ `

## Foo asdf

bar

### baz

qux
`

const output = /*md*/ `\
---
title: Foo asdf
---

bar

### baz

qux
`

const consumeFirstHeading = (lines: string[]): { heading: string; lines: string[] } => {
  // consume all empty lines with regex
  const spaces = lines.findIndex((line) => !line.match(/^\s*$/)) ?? 0
  // split into frontmatter and content

  const [frontmatter, ...content] = lines.slice(0, spaces)
  console.log({ frontmatter, content })
  return { heading: frontmatter, lines: content }
}

Deno.test("first heading is consumed into frontmatter", () => {
  const result = consumeFirstHeading(input.split("\n"))
  assertEquals(result, {
    heading: "Foo asdf",
    lines: ["bar", "", "### baz", "", "qux"],
  })
})

Versions

deno 1.36.4+0b3968c (canary, x86_64-unknown-linux-gnu)
v8 11.7.439.6
typescript 5.2.2

[bartlomieju]

@scarf005 what is your Linux distro and version, and what do you get when you run uname -r?

[scarf005]

...oh, forgot to mention. the kernel is built from home.

distro: Kubuntu 23.04 x86_64
kernel: 6.5.0 built from home
uname -r: 6.5.0-stock

[bartlomieju]

@scarf005 are you using WASM in your project?

[scarf005]

probably not, i've only used stdlib and asynciter. here's my configuration for reference.

deno.tar.gz