private boolean hasErrors() {
		return thread != null && thread.hasErrors();
	}
Parse the PDB file, enforcing pre-conditions and post-conditions.

@throws IOException If an I/O error occurs
@throws PdbException  if there was a problem during processing
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb/PdbParser.java