Issue 4434: autocomplete in console debugger does not recognize variables in catch block.

Steps to reproduce

  1. Open Firebug and enable the Console and Script panel, reload this page.
  2. Press this button:
  3. The debugger shoul stop at line 21
  4. Go to the console panel and make sure that autocompletion offers following variables (in the command line):
    myGlobal1
    myParam1
    myVar1