WaveDumper outputs empty file when test() {expect()} fails

### Describe the bug

I am using the test() { expect () } construct and when the expect throws an exception the resulting wave.vcd is empty. Would be nice to have the waveform without me modifying the test during debug.

### To Reproduce

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### Expected behavior

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### Actual behavior

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### Additional: Dart SDK info

_No response_

### Additional: pubspec.yaml

```yaml

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### Additional: Context

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