MacDownApp/macdown

Crash when scrolling on initial Markdown preview render (MacOS Sierra)

Open

#716 opened on 2016年12月23日

GitHub で見る
 (7 comments) (0 reactions) (0 assignees)Objective-C (7,686 stars) (930 forks)batch import
bughelp wanted

説明

I noticed today that when I opened a rather large Markdown file in Macdown, and tried to scroll down immediately, before the preview finished rendering, the application would crash. This happened a couple of times, also with some smaller files. I successfully managed to replicate it just before writing this report (to get the crash log). It seems to be an issue with the main view trying to scroll the preview view before it has any content. Here is an image of the crash log: image

Here is the full log: http://pastebin.com/EenjhawV

コントリビューターガイド

技術スタック
objective c
領域
desktop
Issue 種別
bug
難度新しい貢献者にとっての実装難度です。1 は非常に小さな変更、5 は専門的な作業です。
3
推定時間経験ある貢献者が調査、実装、テスト、pull request 準備にかけるおおよその時間範囲です。
1-3 hours
活動状況Issue が今どれだけ取り組みやすいかを示します。新しい、活発、古い、ブロック中、またはメンテナー入力待ちなどです。
stale
明確さ期待される変更、受け入れ条件、次の手順がどれだけ明確かを示します。
clear
前提条件
Objective CmacOS developmentdebugging with Xcode
初心者向け度初回貢献者にどれだけ取り組みやすいかを 1-100 で推定したスコアです。
50
調査方針
The crash occurs when scrolling the preview before it's fully rendered, likely due to a nil content view. Investigate the preview rendering lifecycle in MacDown's source code, specifically the methods handling scroll and content updates. Look for where the preview view's content is set and ensure that scrolling is prevented or deferred until content is available. Check the crash log in the issue for exact stack trace to identify the class and method causing the crash.