- An LL FIR test failed after merging stub-based deserialized symbol
providers into combined Kotlin symbol providers:
`DiagnosticCompilerTestFE10TestdataTestGenerated.TestsWithStdLib.Multiplatform.testJvmOverloads`
- Cause: The combined Kotlin symbol provider was able to find a class
for `JvmOverloads`. However, the `KtModule` of `JvmOverloads` was
`LibraryByRoots` with just the stdlib, while the registered stub-based
deserialized symbol provider was known to the combined symbol provider
with a `LibraryByRoots` containing 6 different paths. Hence, the
single-root module wasn't found in the provider map.
- The fix creates a `LibraryByRoot` for each root, which leads to a
separate deserialized symbol provider for each of the six roots,
solving the discoverability problem.
Marco Pennekamp
bb7625c5b0