cut: treat -b2-,3- like -b2-, not like -b3-

* src/cut.c (set_fields): When two right-open-ended ranges are
specified, don't blindly let the latter one take precedence over
the former.  Instead, use the union of the ranges.
* tests/misc/cut.pl: Add tests to exercise this.
* NEWS (Bug fixes): Mention it.
Reported by Marcel Böhme in http://bugs.gnu.org/12966
Thanks to Berhard Voelker for catching log and NEWS typos.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/cut.c b/src/cut.c
index 2a571483a..b464840d7 100644
--- a/src/cut.c
+++ b/src/cut.c
@@ -391,8 +391,10 @@ set_fields (const char *fieldstr)
                  In any case, 'initial' contains the start of the range. */
               if (!rhs_specified)
                 {
-                  /* 'n-'.  From 'initial' to end of line. */
-                  eol_range_start = initial;
+                  /* 'n-'.  From 'initial' to end of line.  If we've already
+                     seen an M- range, ignore subsequent N- unless N < M.  */
+                  if (eol_range_start == 0 || initial < eol_range_start)
+                    eol_range_start = initial;
                   field_found = true;
                 }
               else