exposed thereby. AFAICT these would not lead to any worse problems than
junk emitted on the backend's stdout, but we should have the option to
catch possible worse errors in future.
tests) when using flex 2.5.31. The fix is to *not* try to use palloc
and pfree for allocations within the lexer; when you do that, the
yy_buffer_stack gets freed at inopportune times. The code is already
set up to do manual deallocation, so I see no particular advantage to
using palloc anyway.
