Fix bug with original null mappings #2748
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↪️ Pull Request
If an original mapping had null and that map needed to be extended (aka null mappings from node_modules & TS).
originalPositionFortried to get the location of this mapping.Fixes #2738
💻 Examples
https://github.com/ross-pfahler/parcel-sourcemap-bug (note: remove yarn.lock if using yarn as it uses the Adobe corp artifactory)
🚨 Test instructions
Run the Repo it should work. Probably gonna add a test for this though.
Tried to write a test for this but it seems hard to write a minimal repro testcase for this. This was probably also the reason I never added tests for sourcemaps in node_modules.
✔️ PR Todo