lalr1.cc: document exception safety

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
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+++ b/NEWS
@@ -39,6 +39,15 @@ GNU Bison NEWS
 
   will use YY_CALC_LIB_PARSE_H_INCLUDED as guard.
 
+** Exception safety (lalr1.cc)
+
+  The parse function now catches exceptions, uses the %destructors to
+  release memory (the lookahead symbol and the symbols pushed on the stack)
+  before rethrowing the exception.
+
+  This feature is somewhat experimental.  User feedback would be
+  appreciated.
+
 * Noteworthy changes in release 2.6.2 (2012-08-03) [stable]
 
 ** Bug fixes