Unexpected Type error message due to not all required sources being compiled

[robstryker]

Problem being created in pde/eclipse.pde/ui/org.eclipse.pde.runtime/src/org/eclipse/pde/internal/runtime/registry/RegistryBrowser.java

Problematic code is:

private void hookDoubleClickAction() {
	fTreeViewer.addDoubleClickListener(event -> {
		IStructuredSelection selection = fTreeViewer.getStructuredSelection();
		if (selection.size() == 1) {
			Object obj = selection.getFirstElement();
			if (obj instanceof Bundle)
				ManifestEditor.openPluginEditor(((Bundle) obj).getSymbolicName());
		}
	});
}

The problem is that ManifestEditor is not one of the files passed in to be compiled.

In the call to JavacTask task = ((JavacTool)tool).getTask(null, fileManager, null /* already added to context */, List.of(), List.of() /* already set */, sourceFiles, javacContext);, the sourceFiles do not include files from other projects., apparently?

Most of a trace below, with the messy middle deleted:

JavacProblem(DefaultProblem).(char[], String, int, String[], int, int, int, int, int) line: 49
JavacProblem.(char[], String, String, int, String[], int, int, int, int, int) line: 23
JavacProblemConverter.createJavacProblem(Diagnostic) line: 138
JavacCompiler.lambda$8(Set, JavacProblemConverter, Map, Diagnostic) line: 127
0x00007f6813ba4430.report(Diagnostic) line: not available
Log.writeDiagnostic(JCDiagnostic) line: 741
Log$DefaultDiagnosticHandler.report(JCDiagnostic) line: 722
Log.report(JCDiagnostic) line: 675
Log(AbstractLog).error(JCDiagnostic$DiagnosticPosition, JCDiagnostic$Error) line: 116
Attr.check(JCTree, Type, Kinds$KindSelector, Attr$ResultInfo) line: 236

... etc etc ...

ProceedOnErrorGen(Gen).genClass(Env, JCClassDecl) line: 2494
JavacCompiler$2(JavaCompiler).genCode(Env, JCClassDecl) line: 770
JavacCompiler$2(JavaCompiler).generate(Queue<Pair<Env,JCClassDecl>>, Queue) line: 1700
JavacCompiler$2.generate(Queue<Pair<Env,JCClassDecl>>, Queue) line: 166
JavacTaskImpl.generate(Iterable) line: 468
JavacTaskImpl.lambda$generate$2() line: 445
0x00007f6813af54b0.call() line: not available
JavacTaskImpl.invocationHelper(Callable) line: 152
JavacTaskImpl.generate() line: 445
JavacCompiler.compile(ICompilationUnit[]) line: 215
BatchImageBuilder(AbstractImageBuilder).compile(SourceFile[], SourceFile[], boolean) line: 441
BatchImageBuilder.compile(SourceFile[], SourceFile[], boolean) line: 250
BatchImageBuilder(AbstractImageBuilder).compile(SourceFile[]) line: 372
BatchImageBuilder.build() line: 118
JavaBuilder.buildAll() line: 311