tree c6b969c60bb9b1ddefc89e6ec1369d88d75dcfbc
parent 51781428ead9a2142795764d0c42abfd9bb47171
author Herbert Xu <herbert@gondor.apana.org.au> 1420458657 +1100
committer Herbert Xu <herbert@gondor.apana.org.au> 1420459132 +1100

input: Allow two consecutive calls to pungetc

The commit ef91d3d6a4c39421fd3a391e02cd82f9f3aee4a8 ([PARSER]
Handle backslash newlines properly after dollar sign) created
cases where we make two consecutive calls to pungetc.  As we
don't explicitly support that there are corner cases where you
end up with garbage input leading to undefined behaviour.

This patch adds explicit support for two consecutive calls to
pungetc.

Reported-by: Jilles Tjoelker <jilles@stack.nl>
Reported-by: Juergen Daubert <jue@jue.li>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>