patch 7.4.1013
Problem:    The local value of 'errorformat' is not used for ":lexpr" and
            ":cexpr".
Solution:   Use the local value if it exists. (Christian Brabandt) Adjust the
            help for this.
diff --git a/src/quickfix.c b/src/quickfix.c
index 7243a0c..758f792 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -4230,7 +4230,10 @@
 	if ((tv->v_type == VAR_STRING && tv->vval.v_string != NULL)
 		|| (tv->v_type == VAR_LIST && tv->vval.v_list != NULL))
 	{
-	    if (qf_init_ext(qi, NULL, NULL, tv, p_efm,
+	    char_u *efm = *curwin->w_buffer->b_p_efm == NUL ? p_efm
+						  : curwin->w_buffer->b_p_efm;
+
+	    if (qf_init_ext(qi, NULL, NULL, tv, efm,
 			    (eap->cmdidx != CMD_caddexpr
 			     && eap->cmdidx != CMD_laddexpr),
 				 (linenr_T)0, (linenr_T)0, *eap->cmdlinep) > 0
diff --git a/src/version.c b/src/version.c
index badcf25..f6f0754 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1013,
+/**/
     1012,
 /**/
     1011,