vim-patch:8.2.3783: confusing error for using a variable as a function

Problem:    Confusing error for using a variable as a function.
Solution:   If a function is not found but there is a variable, give a more
            useful error. (issue vim/vim#9310)

https://github.com/vim/vim/commit/2ef9156b4284e4a52613c36e3d4667245273a28d

Co-authored-by: Bram Moolenaar <Bram@vim.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 1d9061186a..b8daa78c79 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -2220,6 +2220,7 @@ static int eval_func(char **const arg, evalarg_T *const evalarg, char *const nam
   const bool evaluate = flags & EVAL_EVALUATE;
   char *s = name;
   int len = name_len;
+  bool found_var = false;
 
   if (!evaluate) {
     check_vars(s, (size_t)len);
@@ -2228,7 +2229,7 @@ static int eval_func(char **const arg, evalarg_T *const evalarg, char *const nam
   // If "s" is the name of a variable of type VAR_FUNC
   // use its contents.
   partial_T *partial;
-  s = deref_func_name(s, &len, &partial, !evaluate);
+  s = deref_func_name(s, &len, &partial, !evaluate, &found_var);
 
   // Need to make a copy, in case evaluating the arguments makes
   // the name invalid.
@@ -2241,6 +2242,7 @@ static int eval_func(char **const arg, evalarg_T *const evalarg, char *const nam
   funcexe.fe_evaluate = evaluate;
   funcexe.fe_partial = partial;
   funcexe.fe_basetv = basetv;
+  funcexe.fe_found_var = found_var;
   int ret = get_func_tv(s, len, rettv, arg, evalarg, &funcexe);
 
   xfree(s);