Bison: Downgrade to version 2.4 until wheezy is released?

[Felipe Sateler <fsateler@gmail.com>]

Dear release team,

I'd like to point you to this bug in bison. Certain new features of
Bison 2.6 have caused incompatibilities with 2.4. This has resulted in
at least one package failing to build.

I have set the severity to serious, because it causes other packages
to FTBFS. Please advise with how to proceed for packages that
build-depend on bison (eg, see #689988).


Saludos,
Felipe Sateler