Can't pass `this` to `template` in the runtime compiler

[boris-petrov]

🐞 Describe the Bug

Check the repro.

🔬 Minimal Reproduction

import TemplateCompiler from '@ember/template-compiler/runtime';
...
  test('asd', async function (assert) {
    this.cls = 'asd';
    await render(TemplateCompiler.template('<div>{{this.cls}}</div>', { scope: () => ({ this: this }) }));
    assert.dom().hasText('asd');
  });

😕 Actual Behavior

SyntaxError: Unexpected token 'this'
    at new Function (<anonymous>)

🤔 Expected Behavior

No error.

🌍 Environment

• Ember: 6.10.1
• Ember-CLI: 6.10.2
• Node.js/npm: v25.6.1
• OS: Linux
• Browser: Any

➕ Additional Context

The problem is on this line:

return new Function(...argNames, `return (${source})`)(...argValues);

Can't create a function with this as an argument name.

cc @NullVoxPopuli

[NullVoxPopuli]

Fix: #21098