denoland/deno · error

No valid icon images found for .icns

Error message

No valid icon images found for .icns

What it means

Error "No valid icon images found for .icns" thrown in denoland/deno.

Source

Thrown at cli/tools/desktop.rs:5183

  icns_path: &Path,
) -> Result<(), deno_core::error::AnyError> {
  use std::io::Write;

  let mut icons: Vec<(&'static [u8; 4], Vec<u8>)> = Vec::new();
  for entry in entries {
    let src = cwd.join(&entry.path);
    if !src.exists() {
      log::warn!("Icon '{}' not found, skipping", src.display());
      continue;
    }
    let data = std::fs::read(&src)?;
    for code in icns_ostypes_for_size(entry.size) {
      icons.push((*code, data.clone()));
    }
  }

  if icons.is_empty() {
    deno_core::anyhow::bail!("No valid icon images found for .icns");
  }

  // File header (8 bytes) + for each icon: 4-byte OSType + 4-byte length + payload.
  let total_size: u32 = icons
    .iter()
    .map(|(_, data)| 8 + data.len() as u32)
    .sum::<u32>()
    + 8;

  let mut buf = Vec::with_capacity(total_size as usize);
  buf.write_all(b"icns")?;
  buf.write_all(&total_size.to_be_bytes())?;
  for (code, data) in &icons {
    buf.write_all(*code)?;
    let entry_len = 8 + data.len() as u32;
    buf.write_all(&entry_len.to_be_bytes())?;
    buf.write_all(data)?;
  }

View on GitHub (pinned to 89f33cbef2)

When it happens

Trigger: Thrown at cli/tools/desktop.rs:5183 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of denoland/deno@89f33cbef2 (2026-08-16). Data as JSON: /api/errors/12929de5b309e830. Report an issue: GitHub.