From: Johan Holmberg <holmberg@...>
Date: 2003-04-18T00:25:35+09:00
Subject: Cryptic -w warning: ambiguous first argument; make sure ...


Hi  !

I wrote something like

    str = "banana"
    str.gsub! /a/, "*"
    puts str

When running this this with the -w option I get the following
warning:

    ex1.rb:4: warning: ambiguous first argument; make sure


My first question when seeing this was:  make sure what ???
I thought that maybe the output on my terminal was garbled in some
way, but after looking at the source code it seems that the message
is exactly as quoted above.

The warning disappears if I put parenteses around the parameters to
the gsub! method.

But I still wonder what the warning is trying to say.
Does anybody know ?

/Johan Holmberg