Task: Typescript errors disappear after document closed

• VSCode Version: 1.22.1 (newest) (typescript 2.8.1)
• OS Version: Windows 10 64bit

I expect typescript errors from all files to show until they have been fixed.

Instead, they disappear as soon as the document is closed again (e.g. by randomly clicking on the error list, which causes documents to open & close again)

Steps to Reproduce:

1. Use this tasks.json (check if the project path fits you first)

{
    "version": "2.0.0",
    "command": "tsc",
    "isShellCommand": true,
    "args": [
        "-w",
        "-p",
        "."
    ],
    "showOutput": "silent",
    "isBackground": true,
    "problemMatcher": {
        "base": "$tsc-watch",
        // "owner": "typescript",
        //  "applyTo": "allDocuments"
    }
}

1. Start the task
2. Errors will show in error list (hopefully, if there are errors at all)
3. Randomly click between errors of different files in error list. The files will open and close automatically (if they are not pinned). When a file closes, it’s errors disappear!

What I have tried:

• $tsc-watch matcher without any other options
• owner property “typescript” or something artificial
• applyTo property all possibilities
• in settings: typescript.validate.enable === false

The “best” in my trial and error endevour I have got was that the errors just persisted, even when fixed, lol 😃

My user settings (don’t have workspace settings)

{
    "terminal.integrated.shell.windows": "C:\\Windows\\System32\\cmd.exe",
    "editor.wordWrap": "on",
    "explorer.confirmDelete": false,
    "editor.quickSuggestions": {
        "other": false,
        "comments": false,
        "strings": false
    },
    "editor.autoClosingBrackets": false,
    "explorer.confirmDragAndDrop": false,
    "editor.acceptSuggestionOnCommitCharacter": false,
    "window.zoomLevel": 0,
    "explorer.autoReveal": true,
    "editor.suggestOnTriggerCharacters": true,
    "editor.acceptSuggestionOnEnter": "on",
    "editor.parameterHints": true,
    "typescript.referencesCodeLens.enabled": false,
    // "typescript.validate.enable": false
}

Does this issue occur when all extensions are disabled?: Yes

[massimonewsuk]

We recently swapped from Flow to TypeScript.

In our previous workflow with Flow, the errors would remain when we opened/closed files.

However, with Typescript, none of the errors show by default (when all files are closed). For this reason, we use VSCode’s Tasks -> Run Build Task, to run the detected tsconfig.watch. This is great because it shows all errors across the project without having to open files.

However, when we open a file then close it, the error disappears from the problems tab (same issue as described above).

We would love for there to be a configuration option to disable removing errors from problems tab until they are fixed. This would be a simple fix. An even cooler one would be for this behaviour to be automatic when using a typescript watcher.

[massimonewsuk]

Yes but after you close a file, the errors disappear from the file browser bar and the IDE’s problems summary