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A-->B-->C-->E-->A
	 \->D-/

(SR + RR in same state, where terminal set of RR intersects with SR)
for details see last section of thesis

show error message in case buildfile was not found

bugfix: check if there are precs before collapsing 

Fixed bug that caused assoc to be left if resolving single item

with assoc

start symbol

item to be moved is not the last one and moving does not affect further
conflicts

hand side and affects no others

required

bugfix

an error