Please use "code" tags to preserve code formatting.

In this snippet: 

 sub {\&show_cwd(); $dirtree_frame->destroy})->pack(-fill => "both",
                                                          -expand => 1
+);

[download]
The "sub" returns a code-reference
The "->pack" is a dereference followed by a call to the "pack" method.

Since the subref does not de-reference to something that allows a method call, perl complains.

Update 1: Sorry - this is rubbish. I just noticed the "), which means you are calling "pack" on whatever is returned by "$dirtree_frame->Scrolled".

Update 2: New theory :

$dirtree_frame is not created properly.
Evidence is the TWO messages complaining about the object - one for each method call (Scrolled and destroy).
Update 3: Athanasius (++) , below is right. And thanks for fixing the formatting, and Welcome to the Monastery!

             I hope life isn't a big joke, because I don't get it.
                   -SNL

In reply to Re: Useless use of reference constructor in void context by NetWallah
in thread Useless use of reference constructor in void context by myfamilygeneral

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