Sung Jeon BasixKOR

Ghostty segfaults during CoreText font discovery when any installed font has a NULL display name (`CTFontCopyDisplayName` → NULL)

Heads up on process: ghostty's CONTRIBUTING.md asks bugs to start as an "Issue Triage" discussion, not a raw issue (new issues are disabled in the repo). This is written as an issue body but should be filed at https://github.com/ghostty-org/ghostty/discussions/new?category=issue-triage — the content maps 1:1. Please search open discussions/issues first and upvote instead of duplicating if a match exists (closest neighbors I found are listed at the bottom — none are this exact bug).

Summary

On macOS, DeferredFace.name() (CoreText backend) calls CTFontCopyDisplayName() and immediately dereferences the result with no NULL check. CoreText returns NULL for the display name of any font whose name table lacks a usable full-name / family-name record. When font discovery walks the installed fonts and hits such a font, Ghostty dereferences NULL and dies with

Contributions Unlisted On GitHub

Fedora Project

Pull Request to website (March 22, 2018) - https://pagure.io/fedora-websites/pull-request/793

Mozilla Firefox

https://phabricator.services.mozilla.com/p/basix/

Normalizing Codepage in Node.js

Only tested in CP-949.

Note

This will only work on the codepages below.
- Windows codepages: 874, 1250-1258
- IBM codepages: 437, 737, 775, 808, 850, 852, 855-858, 860-866, 869, 922, 1046, 1124, 1125, 1129, 1133, 1161-116
Multi-byte: 932, 936, 949, 950

	$ opencode run hey -m anthropic/claude-sonnet-4-20250514 --print-logs

	INFO 2025-07-23T16:52:22 +30ms service=default version=0.3.57 args=["run","hey","-m","anthropic/claude-sonnet-4-20250514","--print-logs"] opencode
	INFO 2025-07-23T16:52:22 +0ms service=app cwd=/Users/basix/work/secret-project creating
	INFO 2025-07-23T16:52:22 +1ms service=app git=/Users/basix/work/secret-project git
	INFO 2025-07-23T16:52:22 +2ms service=bus type=storage.write subscribing
	INFO 2025-07-23T16:52:22 +0ms service=app name=bus registering service
	INFO 2025-07-23T16:52:22 +0ms service=format init
	INFO 2025-07-23T16:52:22 +0ms service=bus type=file.edited subscribing
	INFO 2025-07-23T16:52:22 +0ms service=config.hooks init

	#!/bin/zsh
	set -euo pipefail

	# yarn.lock 문제의 해소는 크게 3단계로 나뉩니다.
	#
	# 1. 먼저 conflict 난 파일 목록에 yarn.lock 외의 다른 파일이 없는지 봅니다.
	# 2. 없다면, yarn.lock을 고칩니다.
	# 3. 고쳐졌다면, 현재 작업이 merge/rebase인지 확인하고 알맞게 동작합니다.

	# Copyright (c) 2024 Software Freedom Conversancy

	import { Img, HTMLChakraProps } from '@chakra-ui/core';
	import NextImage from 'next/image';
	import { forwardRef, Ref } from 'react';

	type NextImageProps = Parameters<typeof NextImage>[0]; // should be replaced with import from next when it exports its type
	export type ImageProps = Omit<
	HTMLChakraProps<'img'>,
	'src' \| 'srcSet' \| 'ref' \| 'width' \| 'height' \| 'loading' \| 'w' \| 'h' // TODO let it work with Chakra width/height props
	> &
	NextImageProps;

	struct Fibonacci(usize, usize);
	impl Iterator for Fibonacci {
	type Item = usize;
	fn next(&mut self) -> Option<Self::Item> {
	let second = self.1;
	self.1 = self.0 + self.1;
	self.0 = second;
	Some(self.1)
	}
	}

	use std::io::{stdin, stdout, BufRead, BufWriter, Write};

	fn main() {
	let stdin = stdin();
	let mut stdin = stdin.lock();
	let stdout = stdout();
	let mut stdout = BufWriter::new(stdout.lock());

	// your code here
	}

	const { xxh32 } = require('@node-rs/xxhash-win32-x64-msvc'); // change it if you use another platform
	xxh32('1');

	/// Recursive
	fn gcd<T>(a: T, b: T) -> T where T: std::ops::Rem<Output = T> + Eq + From<u8> + Copy {
	if b == T::from(0u8) {
	a
	} else {
	gcd(b, a % b)
	}
	}

	/// Iterated