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A Hidden Weakness

This is the story of a bug hunt that lasted much longer than expected, but ended with the dearest of all treasures: knowledge. Let's draw some context: the Android platform defines different API levels.

This is the story of a bug hunt that lasted much longer than expected, but ended with the dearest of all treasures: knowledge. ok, so the strict keyword implies a compilation error if we reference that symbol while targeting a lower version. Et voilà, Firefox defaults to building with hidden visibility, this impacts the weak symbols generated as a consequence of__attribute__((__availability__(android,introduced=29))) and we can indeed reproduce the issue:

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