StackOverflowError when trying to test project, but only when module-info.java is present

I'm getting the following exception when trying to test my project. It looks like a loop in the code.

```
!ENTRY org.eclipse.core.jobs 4 2 2023-10-14 19:31:22.097
!MESSAGE An internal error occurred during: "Launching jsweet-transpiler".
!STACK 0
java.lang.StackOverflowError
at org.eclipse.jdt.internal.core.NameLookup.findType(NameLookup.java:812)
at org.eclipse.jdt.internal.core.NameLookup.findType(NameLookup.java:742)
at org.eclipse.jdt.internal.core.SearchableEnvironment.find(SearchableEnvironment.java:188)
at org.eclipse.jdt.internal.core.SearchableEnvironment.findType(SearchableEnvironment.java:542)
at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.fromSplitPackageOrOracle(LookupEnvironment.java:428)
at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.lambda$1(LookupEnvironment.java:301)
at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForTypeFromModules(LookupEnvironment.java:395)
at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:300)
at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:276)
at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findImport(CompilationUnitScope.java:585)
at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.resolveImports(CompilationUnitScope.java:291)
at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.checkAndSetImports(CompilationUnitScope.java:258)
at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:596)
at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.accept(HierarchyResolver.java:209)
at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:346)
at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:276)
at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findImport(CompilationUnitScope.java:585)
at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.resolveImports(CompilationUnitScope.java:291)
at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.checkAndSetImports(CompilationUnitScope.java:258)
at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:596)
at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.accept(HierarchyResolver.java:209)
...
```

I'm running Eclipse-IDE on macOS Version: 2023-09 (4.29.0), Build id: 20230907-1323
java.vendor.version=Temurin-17.0.8.1+1

Steps to reproduce:

1. `git clone --depth 1 --single-branch -b ck/EclipseStackOverflow https://github.com/kohlschutter/jsweet`
2. Import Maven projects into Eclipse
3. Run junit tests for the `jsweet-transpiler` submodule
4. Rename `jsweet-transpiler/src/main/java/module-info.java.txt` to `module-info.java`
5. Update m2e project settings (Maven -> Update project)
6. Remove files from `(default package)` in src/test/java (which now no longer works since it's modularized)
7. Run junit tests again
8. Notice StackOverflowError. Eclipse wants to exit the workbench, logs are written as above