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**TypeScript Version:**  3.0.0-dev.201xxxxx

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**Code**

```ts
// A *self-contained* demonstration of the problem follows...
// Test this by running `tsc` on the command-line, rather than through another build tool such as Gulp, Webpack, etc.
```

**Expected behavior:**

**Actual behavior:**

**Playground Link:** <!-- A link to a TypeScript Playground "Share" link which demonstrates this behavior --> 

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