The generated IR folder is massive on v0.5.1

[ertjr]

At my org, we tried moving from v0.4.3 to v0.5.1 in our CI pipeline, but noticed a couple issues.

First, the build started failing with message:
Error: nonexistentCache("Couldn't find cache at: .. /Library/Developer/Xcode/DerivedData/projectname/Build/Intermediates.noindex/XCBuildData/PIFCache. Ensure a clean build AND ensure xcodebuild clean happens separately from xcodebuild archive command")

So I moved xcodebuild clean to happen separately before the build (previously we used fastlane gym with clean: true option to both clean and archive).

This change made gen-ir complete successfully, but the IR folder in the resulting archive was much much larger than before (10gb vs 1gb). The new larger IR folder has all the same feature modules as before, but now each module folder contains not only the module files .bc, but now they also contain hundreds of other files. Every module has these same files, which seems to be where the 10gb size comes from. Here's some examples of these duplicated files in each module:

• _DequeBuffer.bc
• _HashTable.bc
• AnyDecoder.bc
• BundleType.bc
• ... many more

Previously, these files appeared once - the swift-collections files like _DequeBuffer.bc and _HashTable.bc in Archive.xcarchive/IR/OrderedCollections, the Datadog (a third party library we use) files like AnyDecoder.bc and BundleType.bc in Archive.xcarchive/IR/DatadogInternal

It seems our libraries are being duplicated and included in each of our feature modules. Anyone know what's going wrong here or what's causing the duplicating behaviour? Thanks