When using llvm-link to link multiple bitcode files from swift source, the following warning is seen when using dsymutil:
This is very similar to the problem reported in https://bugs.swift.org/browse/SR-5935 which has been marked as resolved.
In the attached llvm-link-dsymutil-repro.zip, if the "17.bc" and "24.bc" are linked together using llvm-link, dsymutil outputs warnings as seen in the attached "repro-output.txt"
The "repro.sh" script can be used to reproduce the issue. However because of the limits in the attachment size, I could not include the dependent Frameworks. I can send those via another mechanism upon request. Alternatively, they can be obtained by building the open source Gulps application found at https://github.com/FancyPixel/gulps
The artifacts in the attachments were generated using Xcode 11.1 GM.