[Bug] Explicitly triggered inline completions with promise occasionally raising Uncaught (in promise) Canceled: Canceled

Reproducible in vscode.dev or in VS Code Desktop?

• Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

• Not reproducible in the monaco editor playground

Monaco Editor Playground Link

https://microsoft.github.io/monaco-editor/playground.html?source=v0.49.0#XQAAAAJwBAAAAAAAAABBqQkHQ5NjdMjwa-jY7SIQ9S7DNlzs5W-mwj0fe1ZCDRFc9ws9XQE0SJE1jc2VKxhaLFIw9vEWSxW3yscw6pXnyT9RSPWJrMzrzzSucLOyj4KniHiZODaDJyQLYDbXulsGhSWLNbXK-oOQlkShiZcobhJrftFlfAcmwhyFRKBn_IO53rBhW5f-Eh_hsUjVO4OrLejxx8ojNRoZEjo3erZ4f2X14YvDlCUmie2LxJOy9QMSRye7Z34Ri3qy6LkwYpWaiKVIUcz-Bk_G-YbGbUHRL8O503GOU1qNuTD7lAQrHROmtVwrpiesQOqQqCptpdAEFJwi6tRpbHdIUk-nNDjsKLWxv263Q6D5Pkwyvqk8IP3YdnQewVbKXEI72QSHD15QaK-O4xXVcKw0anlc7_HEcDbFqf7L5F15QWrxNCZsHgsKVsAvdNWmXARmlgOvYpI0F_tAymClfkKzG4JtGMMPEekqwuBUT3j948_Vy50Cb-kFWD2vvXLLUl70N9_7kyCzWNOXbFCjD5xk3RgHX3fFZE6OPger-Pc3c2Nnpi1QBwn91gh6bFOTuLlHWs1UhbaezLeOhF_OELCRl8E05M1bBXydM2hdQ-494iw7EFrfYlVJ56sK4RR6iUBqU8j6jp_0sCb5GKM1MQSHCNQ4h-F2TFYuDPWcwhmV_5zMw30JB2-XwPpjRQ2N0pNUA01ilrINommS8lWTk4x3hUpFgYdOKigbpI7Gob1rw_bL5FH8vDwveeQOMKUmGrJZEcWQznhImBJbPk_6daSVtApp4iiC8YOuSXo0IE1SDmVts3A1ptZLkfHB4He-TgfJ_1-dGgA

Monaco Editor Playground Code

monaco.languages.registerInlineCompletionsProvider("lua", {
	freeInlineCompletions(completions) { console.log('free', completions) },
	provideInlineCompletions: async function (model, position, context, token) {
    if( context.triggerKind == monaco.languages.InlineCompletionTriggerKind.Explicit) {
      // wait 100ms to return value
      var promise = new Promise((resolve) => {
        setTimeout(()=> {
          resolve("hey");
        }, 100);
      })
      var value = await promise;
      return {
        items: [{
          insertText: value,
          text: value,
        }],
        enableForwardStability: true,
      }
	  }
    return { items: [] }
	},
});

var editor = monaco.editor.create(document.getElementById("container"), {
	value: 'function foo() print("hey") end',
	language: "lua",
});

editor.addAction({
  id: 'test',
  label: 'test',
  keybindings: [monaco.KeyMod.CtrlCmd|monaco.KeyMod.Shift|monaco.KeyCode.KeyA],
  run: () => {
    editor.trigger('source - use any string you like', 'editor.action.inlineSuggest.trigger', {});
  },
});

Reproduction Steps

Hit Enter to create new line
Press Ctrl+Shift+A to explicitly trigger an inline completion.

It's not 100% reproducible - sometimes the error is not printed.

Actual (Problematic) Behavior

Error is printed in console.

Expected Behavior

No error should be displayed

Additional Context

I thought this might be a regression of this bug ( https://github.com/microsoft/monaco-editor/issues/2771 ) but that one I can't reproduce in the playground anymore.

Start with the Monaco Editor Playground link and the inline completions provider's provideInlineCompletions callback, especially the editor.action.inlineSuggest.trigger path and its delayed promise. Reproduce the Enter and Ctrl+Shift+A sequence, then trace cancellation handling for the pending promise. Done means the supplied example no longer prints an uncaught Canceled error in the console.