Release Notes: A very subtle bug with the newly introduced virtual yywrap() function in the FlexLexer class was corrected. Depending on how the header was included, the class contained the virtual yywrap() function or not. These differing class declarations lead to very strange NULL pointer exceptions, because the different compiled objects assume different class memory layouts. Ultimately, the exprtest program always segfaulted.
Release Notes: This version solves compilation errors that occurred when no %union directive is used in the grammar. Furthermore, it fixes a problem with the new flex version 2.5.35.