best way to quit the lexer

[Josh]

Hi.  Could anyone suggest a way of terminating a flex lexer from the
"outside", e.g. from a function defined in a Bison parser, without
leaking memory?  The yyterminate() macro is only good within a lexer
action, and YYABORT in a parser action will not deallocate the input
buffer.  Thanks for any tips.

Josh