patch 8.2.1300: Vim9: optional argument type not parsed properlyv8.2.1300

Problem:    Vim9: optional argument type not parsed properly.
Solution:   Skip over the "?". (issue #6507)

1 files changed, 13 insertions, 0 deletions

diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index 49be8f97a2..ade1fd1459 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -350,6 +350,19 @@ def Test_call_funcref()
     let Funcref: func(string) = function('UseNumber')
   END
   CheckScriptFailure(lines, 'E1013: type mismatch, expected func(string) but got func(number)')
+
+  lines =<< trim END
+    vim9script
+    def EchoNr(nr = 34)
+      g:echo = nr
+    enddef
+    let Funcref: func(?number) = function('EchoNr')
+    Funcref()
+    assert_equal(34, g:echo)
+    Funcref(123)
+    assert_equal(123, g:echo)
+  END
+  CheckScriptSuccess(lines)
 enddef
 
 let SomeFunc = function('len')