allocate_mappings returning a negative pointer offset

[steinybot]

Just wondering whether you have seen mozilla/source-map#412 by any chance? It looks as though allocate_mappings is returning a negative pointer offset.

[steinybot]

So it turns out that there was a bug in my code where I was creating multiple consumers. I still feel like there could be an underlying problem here. It certainly isn't obvious from the error what the problem was. It's unclear what would happen if I legitimately needed to create a lot of consumers but perhaps the same problem?

Anyway here is a project that reproduces the issue: https://github.com/steinybot/bug-reports/tree/source-map/bad-ptr

[stahlbauer]

I am facing the same issue with source-map (creating many SourceMapConsumer). Would love to hear more about possible solutions or fixes.

[guimard]

I'm also facing the same issue when trying to rebuild source-map/lib/mapping.wasm