vim-patch:7.4.437

Problem:    New and old regexp engine are not consistent.
Solution:   Also give an error for "\ze*" for the old regexp engine.

https://code.google.com/p/vim/source/detail?r=v7-4-437

1 files changed, 15 insertions, 0 deletions

diff --git a/src/nvim/regexp.c b/src/nvim/regexp.c
index cef2e6d9bf..d57bc889ac 100644
--- a/src/nvim/regexp.c
+++ b/src/nvim/regexp.c
@@ -1983,9 +1983,15 @@ static char_u *regatom(int *flagp)
       break;
 
     case 's': ret = regnode(MOPEN + 0);
+      if (!re_mult_next("\\zs")) {
+        return NULL;
+      }
       break;
 
     case 'e': ret = regnode(MCLOSE + 0);
+      if (!re_mult_next("\\ze")) {
+        return NULL;
+      }
       break;
 
     default:  EMSG_RET_NULL(_("E68: Invalid character after \\z"));
@@ -2460,6 +2466,15 @@ do_multibyte:
   return ret;
 }
 
+/// Used in a place where no * or \+ can follow.
+static bool re_mult_next(char *what)
+{
+  if (re_multi_type(peekchr()) == MULTI_MULT) {
+    EMSG2_RET_FAIL(_("E888: (NFA regexp) cannot repeat %s"), what);
+  }
+  return true;
+}
+
 /*
  * Return TRUE if MULTIBYTECODE should be used instead of EXACTLY for
  * character "c".