human
Solve the following python programming problem given the following code:
def haskell_type(view, filename, module_name, line, column, cabal = None) : 
    result = None 
    if hsdev.hsdev_enabled () : 
        def to_file_pos(r) : 
            return FilePosition ((int (r ['line']) - 1), (int (r ['column']) - 1)) 
def to_region_type(r) : 
            return RegionType (r ['type'], to_file_pos (r ['region'] ['from']), to_file_pos (r ['region'] ['to'])) 
ts = autocomplete.hsdev_client.ghcmod_type (filename, (line + 1), (column + 1), ghc = get_ghc_opts (filename)) 
        if ts : 
            return [to_region_type (column) for r in ts] 
return None 
column = sublime_column_to_ghc_column (view, line, column) 
    line = (line + 1) 
    if hdevtools_enabled () : 
        result = hdevtools_type (filename, line, column, cabal = cabal) 
if ((not result) and module_name and ghcmod_enabled ()) : 
        result = ghcmod_type (filename, module_name, line, column) 
return (parse_type_output (view, result) if result else None) 

    
    

    Fix the buggy line: return [to_region_type (column) for r in ts]
assistant
#Here is Python code to fix the buggy line: return [to_region_type (column) for r in ts]
.

return [to_region_type (r) for r in ts]