transform: fix replacement of numbered pattern instancesHEADmaster

* modules/sed/transform.c (_single_transform_name_to_slist): Avoid
duplicating initial prefix if replace is not needed.
* tests/sed.at: Add new testcases.

1 files changed, 4 insertions, 4 deletions

diff --git a/modules/sed/transform.c b/modules/sed/transform.c
index 67e0de8..ec7983f 100644
--- a/modules/sed/transform.c
+++ b/modules/sed/transform.c
@@ -623,25 +623,25 @@ _single_transform_name_to_slist (struct transform *tr,
       if (rc == 0)
 	{
 	  struct replace_segm *segm;
 	  
 	  disp = rmp[0].rm_eo;
 
-	  if (rmp[0].rm_so)
-	    if (transform_append (tr, slist, input, rmp[0].rm_so))
-	      return 1;
-
 	  nmatches++;
 	  if (tf->match_number && nmatches < tf->match_number)
 	    {
 	      if (transform_append (tr, slist, input, disp))
 		return 1;
 	      input += disp;
 	      continue;
 	    }
 
+	  if (rmp[0].rm_so)
+	    if (transform_append (tr, slist, input, rmp[0].rm_so))
+	      return 1;
+
 	  for (segm = tf->repl_head; segm; segm = segm->next)
 	    {
 	      switch (segm->type)
 		{
 		case segm_literal:    /* Literal segment */
 		  if (case_ctl == ctl_stop)