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Fixes an issue discovered in tree-sitter/tree-sitter-ruby#16
Debugging
This adds a
ts_document_print_debugging_graphs
function. When this boolean flag is set on the document, it dumps a DOT representation of the graph-structured parse stack after every parse action. This output can be piped directly todot
to produce a sequence of graphs and parse actions, like this:#### Bug fix
This fixes a bug wherein ambiguities were merged incorrectly, producing nonsensical parse trees.