patch 9.1.0257: Vim9: :call may not find imported class members

Problem:  Vim9: :call may not find imported class members
          (mityu)
Solution: Set the typval of an imported lval variable correctly
          (Yegappan Lakshmanan)

fixes: #14334
closes: #14386

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_vim9_import.vim b/src/testdir/test_vim9_import.vim
index fa1aeb1..8d68f1e 100644
--- a/src/testdir/test_vim9_import.vim
+++ b/src/testdir/test_vim9_import.vim
@@ -2054,6 +2054,13 @@
     export def GetText(): string
        return 'text'
     enddef
+    export var exported_nr: number = 22
+    def AddNum(n: number)
+      exported_nr += n
+    enddef
+    export var exportedDict: dict<func> = {Fn: AddNum}
+    export const CONST = 10
+    export final finalVar = 'abc'
   END
   writefile(vim9_lines, 'Xvim9_export.vim', 'D')
 
@@ -2072,6 +2079,13 @@
     " imported symbol is script-local
     call assert_equal('exported', s:vim9.exported)
     call assert_equal('text', s:vim9.GetText())
+    call s:vim9.exportedDict.Fn(5)
+    call assert_equal(27, s:vim9.exported_nr)
+    call call(s:vim9.exportedDict.Fn, [3])
+    call assert_equal(30, s:vim9.exported_nr)
+    call assert_fails('let s:vim9.CONST = 20', 'E46: Cannot change read-only variable "CONST"')
+    call assert_fails('let s:vim9.finalVar = ""', 'E46: Cannot change read-only variable "finalVar"')
+    call assert_fails('let s:vim9.non_existing_var = 20', 'E1048: Item not found in script: non_existing_var')
   END
   writefile(legacy_lines, 'Xlegacy_script.vim', 'D')