bug#10030: grep: strange behavior with '-' in character class

[Thomas Dignan]

I have since learned that you are not supposed to escape things within 
brackets at all and simply position them so they have relevant meaning, 
and that dot does not need to be escaped inside brackets.

Not sure if my mail is still relevant.

On 11/12/2011 02:05 PM, Thomas Dignan wrote:
> Hello Coreutils Team,
>
> When I use the command:
>
> echo "/lib64/ld-linux-x86-64.so.2" | grep -o '[a-zA-Z\/0-9\-\.]*'
>
> The result is that I get a tokenized string where - has been replaced 
> with \n
>
> /lib64/ld
> linux
> x86
> 64.so.2
>
> The expected result is:
>
> /lib64/ld-linux-x86-64.so.2
>
> When the character class is modified so that the - is not next to the 
> number 9:
>
> echo "/lib64/ld-linux-x86-64.so.2" | grep -o '[a-zA-Z\/0-9\.\-]*'
>
> /lib64/ld-linux-x86-64.so.2
>
> The expected result is obtained.
>
> I am aware - is used to specify a range, but it is escaped, should 
> this be the proper behaviour?
>
> Thanks,
> Tom