MAINTAINERS: bug-gnu-utils@prep.ai.mit.edu
SUBJECT: Bug in GNU indent 1.9.1 (with patch)

Fuzz testing showed indent could enter an infinite loop.  The simplest
input file I could construct that would cause this behavior was this
admittedly nonsensical one-liner:

''#

(There must *not* be a newline at the end of the line.)

The problem is a loop in indent.c which appears to be checking for
#if/#endif/etc. constructs: it can get confused if it finds EOF before
end-of-line.  I was able to solve the problem by rearranging the terms
of the while-loop's test expression to do what I think the original
author meant.

FWIW, this change didn't affect indent's output on any of the hundreds
of .c and .h files I tested it on on my system.  Still, I didn't fully
understand the code, so it's possible the patch is wrong.