patch 8.2.2965: Vim9: crash when calling function that failed to compile

Problem:    Vim9: crash when calling function that failed to compile.
Solution:   Fail when trying to call the function. (closes #8344)

src/errors.h

@@ -423,3 +423,5 @@ EXTERN char e_one_argument_too_few[]
 	INIT(= N_("E1190: One argument too few"));
 EXTERN char e_nr_arguments_too_few[]
 	INIT(= N_("E1190: %d arguments too few"));
+EXTERN char e_call_to_function_that_failed_to_compile_str[]
+	INIT(= N_("E1191: Call to function that failed to compile: %s"));

src/testdir/test_vim9_func.vim

@@ -74,6 +74,22 @@ def TestCompilingErrorInTry()
   delete('Xdir', 'rf')
 enddef
 
+def Test_compile_error_in_called_function()
+  var lines =<< trim END
+      vim9script
+      var n: number
+      def Foo()
+        &hls = n
+      enddef
+      def Bar()
+        Foo()
+      enddef
+      silent! Foo()
+      Bar()
+  END
+  CheckScriptFailureList(lines, ['E1012:', 'E1191:'])
+enddef
+
 def Test_autoload_name_mismatch()
   var dir = 'Xdir/autoload'
   mkdir(dir, 'p')

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2965,
 /**/
     2964,
 /**/

src/vim9compile.c

@@ -1950,6 +1950,12 @@ generate_CALL(cctx_T *cctx, ufunc_T *ufunc, int pushed_argcount)
 					       PROFILING(ufunc), NULL) == FAIL)
 	    return FAIL;
     }
+    if (ufunc->uf_def_status == UF_COMPILE_ERROR)
+    {
+	emsg_funcname(_(e_call_to_function_that_failed_to_compile_str),
+							       ufunc->uf_name);
+	return FAIL;
+    }
 
     if ((isn = generate_instr(cctx,
 		    ufunc->uf_def_status != UF_NOT_COMPILED ? ISN_DCALL