Behavior difference: Type emit inconsistency with dangling block comment in file

@jakebailey is already working on this.

Since Jun 16, 2026.

Summary as below. I call this situation _dangling block comment_, since there are more than just newlines in between the block comments and the attached variables in the code.

Note that a fix for `top, .ts` will be a breaking change from TS 6.

| | tsc | tsgo |
|-------------|---------------------------------------------------|---------------------------------------------------|
| nonTop, .js | ✅ Dangling comment erased | ✅ Dangling comment erased |
| nonTop, .ts | ✅ Dangling comment erased | ✅ Dangling comment erased |
| top, .js | ✅ Dangling comment erased | ❌ Dangling comment attached to incorrect variable |
| top, .ts | ❌ Dangling comment attached to incorrect variable | ❌ Dangling comment attached to incorrect variable |

---

## Steps to reproduce

1. Start a plain new project
- "@typescript/native-preview": "7.0.0-dev.20260612.1",
- "typescript": "6.0.3"
2. Run `npx tsgo --init` to get the default tsconfig. Turn on these flags as well.
- "allowJs": true,
- "checkJs": true,
- "stableTypeOrdering": true,
- "removeComments": false,
3. Add the below files. Run `npx tsc` & `npx tsgo` to see the difference.

```ts
/** ========> src/nonTopComment-js.js <======== */
export const e = 3;

/** Comment on nothing */

/** Comment on noop */
(function noop() {})();

export const pi = 3;

/** ========> src/nonTopComment-ts.ts <======== */
export const e = 3;

/** Comment on nothing */

/** Comment on noop */
(function noop() {})();

export const pi = 3;

/** ========> src/topComment-js.js <======== */
/** Comment on nothing */

/** Comment on noop */
(function noop() {})();

export const pi = 3;

/** ========> src/topComment-ts.ts <======== */
/** Comment on nothing */

/** Comment on noop */
(function noop() {})();

export const pi = 3;

```

## Behavior with `typescript@6.0`

```ts
/** ========> dist/nonTopComment-js.d.ts <======== */
export const e: 3;
export const pi: 3;
//# sourceMappingURL=nonTopComment-js.d.ts.map

/** ========> dist/nonTopComment-ts.d.ts <======== */
export declare const e = 3;
export declare const pi = 3;
//# sourceMappingURL=nonTopComment-ts.d.ts.map

/** ========> dist/topComment-js.d.ts <======== */
export const pi: 3;
//# sourceMappingURL=topComment-js.d.ts.map

/** ========> dist/topComment-ts.d.ts <======== */
/** Comment on nothing */
export declare const pi = 3;
//# sourceMappingURL=topComment-ts.d.ts.map
```

## Behavior with `tsgo`

```ts
/** ========> dist/nonTopComment-js.d.ts <======== */
export declare const e = 3;
export declare const pi = 3;
//# sourceMappingURL=nonTopComment-js.d.ts.map

/** ========> dist/nonTopComment-ts.d.ts <======== */
export declare const e = 3;
export declare const pi = 3;
//# sourceMappingURL=nonTopComment-ts.d.ts.map

/** ========> dist/topComment-js.d.ts <======== */
/** Comment on nothing */
export declare const pi = 3;
//# sourceMappingURL=topComment-js.d.ts.map

/** ========> dist/topComment-ts.d.ts <======== */
/** Comment on nothing */
export declare const pi = 3;
//# sourceMappingURL=topComment-ts.d.ts.map
```