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Possible memory leak when reloading images in MarkdownTextBlock

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评估

难度
4/5
预计耗时
3-5 天
新手友好度
35/100
Issue 类型
缺陷
描述清晰度
需要澄清
活跃度
停滞
技术栈
csharp
领域
desktop-dev

调研方向

从 issue 中描述的 MarkdownTextBlock Init() 和 LoadImage handler 路径开始,重点关注通过 IImageProvider 替换 _image 实例。建立一个可复现的图像重新加载案例,然后使用适当的泄漏检查验证替换图像不会保留过时的 Loaded handler 或对象。

由索引模型根据 Issue 内容生成。

描述

bug :bug:
Describe the bug

Found by Copilot in https://github.com/CommunityToolkit/Labs-Windows/pull/771/

When using IImageProvider, the _image instance is replaced with a new Image object from the provider. This means the Loaded event handler attached in Init() is lost, since it was attached to the original _image instance. However, since this code is already executing within the LoadImage handler and _loaded is set to true immediately after, this might work correctly. Consider whether the event handler should be detached from the old image or if there's a risk of memory leaks from the orphaned handler on the original image object.

Steps to reproduce
Unknown, need investigation.
Expected behavior

No memory leaks when images are changed.

Screenshots

No response

Code Platform
  • UWP
  • WinAppSDK / WinUI 3
  • Web Assembly (WASM)
  • Android
  • iOS
  • MacOS
  • Linux / GTK
Windows Build Number
  • Windows 10 1809 (Build 17763)
  • Windows 10 1903 (Build 18362)
  • Windows 10 1909 (Build 18363)
  • Windows 10 2004 (Build 19041)
  • Windows 10 20H2 (Build 19042)
  • Windows 10 21H1 (Build 19043)
  • Windows 11 21H2 (Build 22000)
  • Other (specify)
Other Windows Build number

No response

App minimum and target SDK version
  • Windows 10, version 1809 (Build 17763)
  • Windows 10, version 1903 (Build 18362)
  • Windows 10, version 1909 (Build 18363)
  • Windows 10, version 2004 (Build 19041)
  • Other (specify)
Other SDK version

No response

Visual Studio Version

No response

Visual Studio Build Number

No response

Device form factor

No response

Additional context

No response

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主要语言
C#
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