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Facebook WebGL build archive throws "Unsupported compression method" when trying to open files inside

Facebook Gameroom


Steps to reproduce:
1. Open attached ""
2. Build for Facebook platform using WebGL
3. Go to the directory where you built it and try to open the files in the archive
4. Archive throws errors "Unsupported compression method"

Expected: Archived files open properly and are possible to unzip
Actual: Unable to access files in the archive

Reproduced on: 2017.1.0f2
Regression introduced in: 2017.1.0b2
Doesn't reproduce on: 5.6.2f1, 2017.1.0a6

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