Hi,

We found a bug of tr, the version is tr (coreutils) 5.2.1

Here is the symptom:

When there is a file named e or r under current directory, tr will take effect，like：

        echo hello |tr [a-z] [A-Z]

        echo hello |tr [:lower:] [:upper:]

will return hello

And when is a file named l, o, p, u or w under current directory, tr will give error message like:

        echo hello |tr [a-z] [A-Z]

        echo hello |tr [:lower:] [:upper:]

gives : tr: misaligned [:upper:] and/or [:lower:] construct

But if you try

        echo kkhh |tr "[a-z]" "[A-Z]"

        echo kkhh |tr "[:lower:]" "[:upper:]"

There will be no error and it takes effect.

Brs

Bellon Xiao