Dumper: Fix value of not callable pseudo member

Task-number: QTCREATORBUG-8124
Change-Id: I86ab891f18d9a0cc58217711637c8587cd42bb07
Reviewed-by: hjk <hjk@qt.io>

share/qtcreator/debugger/qttypes.py

@@ -508,9 +508,16 @@ def qdump__QFileInfo(d, value):
             d.putCallItem("ownerid", value, "ownerId")
 
             #QFile::Permissions permissions () const
+            try:
                 perms = d.call(value, "permissions")
+            except:
+                perms = None
+
             if perms is None:
-                d.putValue("<not available>")
+                with SubItem(d, "permissions"):
+                    d.putSpecialValue("notcallable")
+                    d.putType(ns + "QFile::Permissions")
+                    d.putNumChild(0)
             else:
                 with SubItem(d, "permissions"):
                     d.putEmptyValue()