Bug 54900 [rulers] Java Editor does not show ruler on external Java files
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitDocumentProvider.java
state.fReportedProblems.add(problem);
				}
			}
			/*
			 * @see IProblemRequestor#endReporting()
			 */
			public void endReporting() {
				ProblemRequestorState state= (ProblemRequestorState) fProblemRequestorState.get();
				if (state != null && !state.fInsideReportingSequence)
					internalEndReporting(state);
			}
			/*
			 * @see org.eclipse.jdt.internal.ui.text.java.IProblemRequestorExtension#endReportingSequence()
			 */
			public void endReportingSequence() {
				ProblemRequestorState state= (ProblemRequestorState) fProblemRequestorState.get();
				if (state != null && state.fInsideReportingSequence)
					internalEndReporting(state);
			}
			private void internalEndReporting(ProblemRequestorState state) {
				int stateCount= 0;
				synchronized(getLockObject()) {
					-- fStateCount;
					stateCount= fStateCount;
					fProblemRequestorState.set(null);
				}
				if (stateCount == 0 && fIsHandlingTemporaryProblems)
					reportProblems(state.fReportedProblems);
			}
			/**