kc3-lang/libxkbcommon

2014-07-26T22:34:05

parser: don't leak AST nodes for discarded symbols If the parser has symbols on the stack, and then enters an error, it discards the symbols and fails. But their actions which allocate AST nodes had already ran. So we must free these to avoid leaks. We use %destructor declarations, see http://www.gnu.org/software/bison/manual/html_node/Destructor-Decl.html Note: byacc only supports %destructor when compiled with --enable-btyacc. Also, it doesn't support using the parse-param in the destructor. So we might revert this commit before the next release, or forget about byacc. https://github.com/xkbcommon/libxkbcommon/issues/8 Signed-off-by: Ran Benita <ran234@gmail.com>