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dispose() causes an error with canvas renderer #4757

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dstein64 opened this issue Sep 7, 2023 · 9 comments · Fixed by #4785
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dispose() causes an error with canvas renderer #4757

dstein64 opened this issue Sep 7, 2023 · 9 comments · Fixed by #4785
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@Tyriar
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area/addon/canvas type/bug Something is misbehaving
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5.4.0

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@dstein64
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dstein64 commented Sep 7, 2023 •
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The terminal's dispose() method leads to an uncaught error when using a canvas renderer. This started with the latest release ([email protected] and [email protected]).

Details

  • Browser and browser version: Chrome 116
  • OS version: Kubuntu 23.04
  • xterm.js version: 5.3.0

Steps to reproduce

Create a page with the following code:

<!doctype html>
<html>
<head>
    <link rel="stylesheet" href="https://unpkg.com/[email protected]/css/xterm.css" />
    <script src="https://unpkg.com/[email protected]/lib/xterm.js"></script>
    <script src="https://unpkg.com/[email protected]/lib/xterm-addon-canvas.js"></script>
</head>
<body>
<div id="terminal"></div>
<script>
    const term = new Terminal();
    term.loadAddon(new CanvasAddon.CanvasAddon());
    term.open(document.getElementById('terminal'));
    term.writeln('Hello world!');
</script>
</body>
</html>

In the developer console, type term.dispose().

The following error message is printed to the console:

RenderService.ts:206 Uncaught TypeError: Cannot read properties of undefined (reading 'onRequestRedraw')
    at t.RenderService.setRenderer (RenderService.ts:206:26)
    at Object.dispose (CanvasAddon.ts:62:21)
    at a.dispose (Lifecycle.ts:22:9)
    at t.AddonManager._wrappedAddonDispose (AddonManager.ts:50:25)
    at t.dispose (AddonManager.ts:30:35)
    at t.AddonManager.dispose (AddonManager.ts:19:32)
    at d.dispose (Lifecycle.ts:22:9)
    at d.dispose (Terminal.ts:195:11)
    at <anonymous>:1:6

This does not occur when the canvas add-on is not used.
@dstein64 dstein64 changed the title dispose() errors with canvas renderer dispose() causes an error with canvas renderer Sep 7, 2023
@dstein64 dstein64 mentioned this issue Sep 7, 2023
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@dstein64
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dstein64 commented Sep 8, 2023

git bisect indicates that this started at 37b0e40.

@Tyriar Tyriar self-assigned this Sep 8, 2023
@Tyriar
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Tyriar commented Sep 8, 2023

Thanks for looking into it, I plan on checking this out today or early next week

@Tyriar Tyriar added this to the 5.3.0 milestone Sep 8, 2023
@Tyriar Tyriar added type/bug Something is misbehaving area/addon/canvas labels Sep 8, 2023
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Tyriar commented Sep 8, 2023

We can do a stable canvas addon release easily so we can fix and publish this.

Tyriar added a commit to Tyriar/xterm.js that referenced this issue Sep 10, 2023
@Tyriar
Fix possible exception when disposing terminal
cc43fe5 
Fixes xtermjs#4757
@Tyriar Tyriar mentioned this issue Sep 10, 2023
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Tyriar commented Sep 10, 2023

@dstein64 fix is out in #4785, it's a change in core so we can't do an addon release to fix it. The change is probably harmless, you stick a try around .dispose() if the error is causing problems.

@Tyriar Tyriar modified the milestones: 5.3.0, 5.4.0 Sep 10, 2023
@BrunoQuaresma
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BrunoQuaresma commented Sep 12, 2023 •
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It is also happening with the WebGL renderer:

TypeError: Cannot read properties of undefined (reading 'onRequestRedraw')

Reverting to 5.2.0 worked.

@polyipseity polyipseity mentioned this issue Sep 21, 2023
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This was referenced Oct 2, 2023
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@martinpitt martinpitt mentioned this issue Dec 7, 2023
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@catz
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catz commented Feb 2, 2024

+1 for Bruno issue. Reverted to 5.2.0 fixed the issue with webgl

@catz
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catz commented Feb 2, 2024

@Tyriar Can you please have a look it for webgl rendered ?

@Tyriar
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Tyriar commented Feb 2, 2024

@catz this is fixed in 5.4.0 which hasn't been released yet. You can use the beta tag version in the meantime, this should be relatively safe as it's what vscode uses.

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catz commented Feb 2, 2024

@Tyriar Daniel, That's awesome news!

@nxps nxps mentioned this issue Sep 27, 2024
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Fix possible exception when disposing terminal Tyriar/xterm.js
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@catz @dstein64 @Tyriar @BrunoQuaresma