Regression of #133: `--reorder-code` empties a file whose sole content is a class-level `@abstract` annotation

[minami110]

Tested on gdscript-formatter 0.21.0 (Pre-release 0.21.0-beta, published 2026-07-12), Linux x86_64. Upstream main checked up to 248fa13b (2026-07-12 09:20 UTC) — no fix commit found.

Appears to be a regression of the previously-fixed issue #133 "Reorder mode drops the @abstract script annotation" (closed COMPLETED 2025-10-16). The exact scenario reproduces again on 0.21.0-beta.

Impact (critical — silent semantic change)

Before formatting, SomeClass.new() is illegal (script is @abstract). After --reorder-code the file is empty, so SomeClass.new() becomes legal and produces an incomplete instance. No parse error, no warning — the class becomes a plain RefCounted. Any codebase using the "abstract base only, subclasses live in other files" pattern silently loses its abstract guard.

Repro

Entire .gd file:

@abstract

Command:

gdscript-formatter --stdout --reorder-code bug.gd

Actual output with --reorder-code

(empty file)

Actual output without --reorder-code

@abstract

Expected

@abstract preserved in both modes (same as the non---reorder-code behaviour).