patch 9.0.1989: Vim9: double error message given

Commit: 
https://github.com/vim/vim/commit/d615a3122a1347ee0d446be4ecb4295b1e0aaabf
Author: Ernie Rael <err...@raelity.com>
Date:   Thu Oct 5 20:28:16 2023 +0200

    patch 9.0.1989: Vim9: double error message given
    
    Problem:  Vim9: double error message given
    Solution: Only give second error message, if ther
              wasn't one given before
    
    closes: #13278
    
    Signed-off-by: Christian Brabandt <c...@256bit.org>
    Co-authored-by: Ernie Rael <err...@raelity.com>

diff --git a/src/version.c b/src/version.c
index 02dd9bfe4..64c68d99d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1989,
 /**/
     1988,
 /**/
diff --git a/src/vim9class.c b/src/vim9class.c
index 925149e66..295716e18 100644
--- a/src/vim9class.c
+++ b/src/vim9class.c
@@ -2221,6 +2221,7 @@ class_object_index(
        return FAIL;
     size_t len = name_end - name;
 
+    int did_emsg_save = did_emsg;
     class_T *cl;
     if (rettv->v_type == VAR_CLASS)
        cl = rettv->vval.v_class;
@@ -2310,7 +2311,8 @@ class_object_index(
            return OK;
        }
 
-       member_not_found_msg(cl, VAR_OBJECT, name, len);
+       if (did_emsg == did_emsg_save)
+           member_not_found_msg(cl, VAR_OBJECT, name, len);
     }
 
     else if (rettv->v_type == VAR_CLASS)

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