Re: [PATCH 2/2] Better system header location detection for built-in macro tokens

[Jason Merrill]

On 06/04/2012 02:54 PM, Mike Stump wrote:
Yup, that is truly weird.  The problem is that the | operator is binding funny 
because there are no () around the substituted variables in the matching 
expressions in the .exp files, and the messages for a single line get the 
opportunity to match and eat multiple lines.
So, dejagnu is using:

        {[0-9]+: error:[^\n]*const|operator}

instead of:

        {[0-9]+: error:[^\n]*(const|operator)}

and that makes all the difference.

That was my guess, too, but when I look at dg.exp it seems that the 
pattern is properly wrapped in parens.

Jason