[bug #29358] segmentation fault in isdir1 with grep-2.6.1

[Philipp Kohlbecher]

Follow-up Comment #1, bug #29358 (project grep):

This is a null pointer dereference in isdir1. The pointer in question is
"path" which is used in isdir1 before being assigned.

Looking at lib/savedir.c, I can't figure out what this "path" variable is
used for.

Simply setting
  pathlen = dirlen + filelen + 2;
  path = xrealloc (path, pathlen);
in isdir1 will fix the segfault.

With this fix in place, the --include switch doesn't work, though.

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