ErrorHandler: Fails to report correct source file path for dependency AST errors

[LesterEvSe]

Project version

0.5.0

Project

errors

What happened?

When a dependency file contains an AST error, the compiler reports it against the wrong source file instead of the actual broken library path.

Minimal reproduction steps

This can be verified using the currently ignored test dependency_ast_errors_use_dependency_source_file in the error_tests module. PR #289