On Thu, Aug 4, 2016 at 2:43 PM, Zieg, Mark (KSC-ESC-624)[VENCORE-ESC] <[email protected]> wrote: > When diffing an empty file against a one-byte file using -B > (--ignore-blank-lines), diff incorrectly reports that the files are > identical, even though they aren't even the same size. The problem does not > occur with files of 2 bytes or longer. I tested this with diffutils 2.8, 3.2 > and 3.3. ... > # HERE IS THE PROBLEM: diff -B does NOT work as expected > deedwl262 [~/work/test] mzieg 09:18 PM $ diff -B foo bar
Thank you for the report. I confirm it was a problem with diffutils-3.3: $ /usr/bin/diff --version|head -1 diff (GNU diffutils) 3.3 $ printf 1 > 1; : > 0; /usr/bin/diff -B 0 1 $ printf 1 > 1; : > 0; /usr/bin/diff -B 1 0 $ It was fixed with this commit, which will be part of the imminent diffutils-3.4 release: commit d2fd9d4683ef60c259a3b426f71cef1b89ff383d Author: Paul Eggert <[email protected]> Date: Wed Sep 3 15:58:03 2014 -0700 diff: fix bug with diff -B and incomplete lines Reported by Navin Kabra via Eric Blake in: http://bugs.gnu.org/18402 * src/util.c (analyze_hunk): Don't mishandle incomplete lines at end of file. * tests/no-newline-at-eof: Test for the bug. So I've marked this auto-created "issue" as resolved.
