Starting v104.4.4 lines of code above $storename cause "Type Foo has no call signatures" etc. errors (with latest dependencies)

[vatro]

Describe the bug
With (since) v104.4.4 (incl., last ok: v104.4.3) I get a lot of "Type Foo has no call signatures" errors in my project mostly after creating instances of Classes let foo = new Foo(), simple assignments to boolean values or to undefined, at the end of ternaries etc., yet not everywhere / always 🤔.

👉 Adding an (optional) semicolon after the certain expressions fixes the errors!

EDIT: When using "Svelte for VSCode" 1.0.4.44 or above, anything written above the $ prefixed store name causes errors (with currently latest versions of Svelte / Svelte ts-app template dependencies). Only lines above $storename-lines are affected. Lines above reactive statements' $ are ok, see #859 (comment)

To Reproduce
Since the problem doesn't seem to occur everywhere / always (?), maybe: take a bigger existing semi: true Svelte/TS component and remove them with Prettier semi: false with "Svelte for VSCode" >= v104.4.4 installed.

EDIT: Meanwhile successfully reproduced, see #859 (comment)

Expected behavior
No errors as with <= v104.4.3

System (please complete the following information):

• Windows 10
• IDE: VSCode
• "Svelte for VSCode" >= v104.4.4

Additional context
tsconfig.js

{
    "extends": "@tsconfig/svelte/tsconfig.json",
   
    "compilerOptions": {
        
        // tested, none of these have something to do with the errors
        "target": "ESNext",
        "strict": true,
        "strictNullChecks": false,
        "noImplicitAny": false,
        "strictFunctionTypes": true,

        // "Svelte for VSCode Problem": "no call signatures" etc. errors: 
        // v103.0.0: ok
        // v104.0.0: ok
        // v104.0.0: ok
        // v104.4.0: ok
        // v104.4.3: ok
        // v104.4.4: errors start

    },
    "include": [
        "src/**/*"
    ],
    "exclude": [
        "node_modules/*",
        "__sapper__/*",
        "public/*"
    ]
} 

Svelte 3.35.0
TypeScript 4.2.3

[dummdidumm]

Could you provide a code snippet where this occurs?

[vatro]

Could you provide a code snippet where this occurs?

sorry, not atm, but they occur at many different places / cases + not always, mostly as I've described above. I couldn't figure out any "real" logic yet. Will take a look again at it later.

EDIT:
The errors could also (somehow, atm: 🤷🏼‍♂️) be related to my project setup, though before I was able to nail them down to (at least as it seems atm) using a specific "Svelte for VSCode" version, I tried changing any of relevant VSCode / tsconfig / RollUp settings.

AND ☝️ before getting them, I believe I've updated all packages (Svelte for sure), so the latest Svelte / TS / RollUp etc. might also be the reason. Will check again later!

[dummdidumm]

As long as it's a reproducible code snippet I'm fine, you don't need to track down the logic

[vatro]

@dummdidumm Ok, I was able to reproduce it:

1. Create a fresh svelte-ts-app

npx degit sveltejs/template svelte-typescript-app
cd svelte-typescript-app
node scripts/setupTypeScript.js

2. Update all dependecies

 "devDependencies": {
    "@rollup/plugin-commonjs": "^17.1.0",
    "@rollup/plugin-node-resolve": "^11.2.0",
    "@rollup/plugin-typescript": "^8.2.0",
    "@tsconfig/svelte": "^1.0.10",
    "rollup": "^2.40.0",
    "rollup-plugin-css-only": "^3.1.0",
    "rollup-plugin-livereload": "^2.0.0",
    "rollup-plugin-svelte": "^7.1.0",
    "rollup-plugin-terser": "^7.0.2",
    "svelte": "^3.35.0",
    "svelte-check": "^1.2.2",
    "svelte-preprocess": "^4.6.9",
    "tslib": "^2.1.0",
    "typescript": "^4.2.3"
  },
  "dependencies": {
    "sirv-cli": "^1.0.11"
  }

3. Create a simple app / component using a store

BUG: When using "Svelte for VSCode" 1.0.4.44 or above, anything written above the $ prefixed store name causes errors. Only lines above $storename-lines are affected. Reactive statements' $ are ok.

adding a semicolon at the end of the affected lines, fixes errors: