Fix assertion when trying to inline virtual (super) calls

[dcodeIO]

Fixes #1342, but does not try to reason about when we can inline nonetheless (can we safely inline any super.xy() call?). Now emits a warning instead of crashing.

• I've read the contributing guidelines

[dcodeIO]

On a first glimpse, a better fix that allows us to inline would have to take something like this into account:

abstract class Foo {
  a(): i32 { return 1; }
  abstract b(): i32;
}
class Bar extends Foo {
  a(): i32 { return super.b(); } // TS2513
  b(): i32 { return 2; }
}

[MaxGraey]

It will be great add simple test for preventing regression in future (after refactoring for example)

[dcodeIO]

Last commit now inlines the super.xy() call, even though Foo#xy() cannot be inlined when called normally. Seems that this is possible, even though quite the edge case. Or does anyone see a scenario where that'd be invalid?

[MaxGraey]

nice!

[github-actions]

🎉 This PR is included in version 0.12.3 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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