Bison 1.875 coredump

[Paul Govereau]

Bison 1.875 will crash if the last rule does not have a semicolon
after it. e.g.

-------------
test.y:
  %%
  program : ID {}
  %%

$ bison test.y
Segmentation fault (core dumped)
---------------

This machine is an old:
  i686 unknown
  linux v2.2.12
  gnu libc v2.1.3
  gcc version egcs-2.91.66
 
Thanks,
Paul Govereau