From c58164c5cff9845f3bf7cfcd75ace43208829388 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sun, 29 Mar 2020 18:40:30 +0200
Subject: patch 8.2.0477: Vim9: error messages not tested

Problem:    Vim9: error messages not tested.
Solution:   Add more tests.
---
 src/vim9execute.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

(limited to 'src/vim9execute.c')

diff --git a/src/vim9execute.c b/src/vim9execute.c
index 5f6f79a15..4846c5521 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -1612,7 +1612,21 @@ call_def_function(
 
 	    case ISN_NEGATENR:
 		tv = STACK_TV_BOT(-1);
-		tv->vval.v_number = -tv->vval.v_number;
+		if (tv->v_type != VAR_NUMBER
+#ifdef FEAT_FLOAT
+			&& tv->v_type != VAR_FLOAT
+#endif
+			)
+		{
+		    emsg(_(e_number_exp));
+		    goto failed;
+		}
+#ifdef FEAT_FLOAT
+		if (tv->v_type == VAR_FLOAT)
+		    tv->vval.v_float = -tv->vval.v_float;
+		else
+#endif
+		    tv->vval.v_number = -tv->vval.v_number;
 		break;
 
 	    case ISN_CHECKNR:
-- 
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