Sed or regex bug?

[Vartan Stepanian]

Hello,

I think I may have found a bug in sed.

 echo "hi"|sed -e 's/[\(a\)\(b\)]//'

The above parses without a problem.

Now assume the following for "a": 

\(\(\(\(\([0-9]\+\)\)\)\?x\(\([\^]\([0-9]\+\)\)\)\?\)\)

it parses by itself.


And assume the following for "b":

\(\([0-9]\+\)\)

it parses by itself also..


Now why can't I substitute a and b into this
expression:  [\(a\)\(b\)]


########################################################################
bash-2.05a$ echo "hi"|sed -e
's/[\(\(\(\(\([0-9]\+\)\)\)\?x\(\([\^]\([0-9]\+\)\)\)\?\)\)\(\([0-9]\+\)\)]//'
sed: -e expression #1, char 76: Unmatched ( or \(
########################################################################


bash-2.05a$ uname -a
Linux hosntame 2.4.18-3 #1 Thu Apr 18 07:32:41 EDT
2002 i686 unknown

This is a redhat 7.3 installation.


Vartan

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