desktop-packages team mailing list archive

[Peter Bergner <1544053@xxxxxxxxxxxxxxxxxx>]

I minimized re.c down to a small test case and it looks like a false
positive on the array bounds check.  Talking with Jakub, he said that
-Warray-bounds has lots of false positives, so I think either removing
the use of -Werror=array-bounds or using -O2 as permanent fixes for this
is probably best.  Since you've already changed to using -O2, we might
as well stick with that.

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https://bugs.launchpad.net/bugs/1544053

Title:
  x11-apps fails to build on ppc64el when built with -O3

Status in x11-apps package in Ubuntu:
  Confirmed

Bug description:
  x11-apps fails to build on ppc64el when built with -O3. can be worked
  around with -O2

  see
  https://launchpad.net/ubuntu/+source/x11-apps/7.7+5+nmu1/+build/8913431

  ../xedit/lisp/re/re.c: In function 'rec_build_pat':
  ../xedit/lisp/re/re.c:2328:17: error: array subscript is above array bounds [-Werror=array-bounds]
        if (inf->sp[i]) {
                   ^
  ../xedit/lisp/re/re.c:2329:21: error: array subscript is above array bounds [-Werror=array-bounds]
     distance = inf->sj[i] - inf->sr[i];
                       ^
  ../xedit/lisp/re/re.c:2329:34: error: array subscript is above array bounds [-Werror=array-bounds]
     distance = inf->sj[i] - inf->sr[i];
                                    ^
  ../xedit/lisp/re/re.c:2331:19: error: array subscript is above array bounds [-Werror=array-bounds]
     inf->cod[inf->sr[i] + 4] = (distance & 0xff00) >> 8;
                     ^

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