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After an internal failure in shortest() or longest() while pinning down the exact location of a match, find() forgot to free the DFA structure before returning. This is pretty unlikely to occur, since we just successfully ran the "search" variant of the DFA; but it could happen, and it would result in a session-lifespan memory leak since this code uses malloc() directly. Problem seems to have been aboriginal in Spencer's library, so back-patch all the way. In passing, correct a thinko in a comment I added awhile back about the meaning of the "ntree" field. I happened across these issues while comparing our code to Tcl's version of the library. |
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