updated for version 7.4.437

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

src/regexp.c

@@ -358,6 +358,8 @@ static void	regdump __ARGS((char_u *, bt_regprog_T *));
 static char_u	*regprop __ARGS((char_u *));
 #endif
 
+static int re_mult_next __ARGS((char *what));
+
 static char_u e_missingbracket[] = N_("E769: Missing ] after %s[");
 static char_u e_unmatchedpp[] = N_("E53: Unmatched %s%%(");
 static char_u e_unmatchedp[] = N_("E54: Unmatched %s(");
@@ -2166,9 +2168,13 @@ regatom(flagp)
 #endif
 
 		case 's': ret = regnode(MOPEN + 0);
+			  if (re_mult_next("\\zs") == FAIL)
+			      return NULL;
 			  break;
 
 		case 'e': ret = regnode(MCLOSE + 0);
+			  if (re_mult_next("\\ze") == FAIL)
+			      return NULL;
 			  break;
 
 		default:  EMSG_RET_NULL(_("E68: Invalid character after \\z"));
@@ -7005,6 +7011,18 @@ regprop(op)
 }
 #endif	    /* DEBUG */
 
+/*
+ * Used in a place where no * or \+ can follow.
+ */
+    static int
+re_mult_next(what)
+    char *what;
+{
+    if (re_multi_type(peekchr()) == MULTI_MULT)
+	EMSG2_RET_FAIL(_("E888: (NFA regexp) cannot repeat %s"), what);
+    return OK;
+}
+
 #ifdef FEAT_MBYTE
 static void mb_decompose __ARGS((int c, int *c1, int *c2, int *c3));