[Bug translator/11195] New: argument expansion needs better recursion protection

["jistone at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

We do have some protection against argument recursion:

$ stap -p1 -e 'probe begin {$1}' '$1'
parse error: invalid nested substitution of command line arguments
	saw: operator '{' at <input>:1:13
     source: probe begin {$1}
                         ^
parse error: expected statement
	saw: <input> EOF
2 parse error(s).
Pass 1: parse failed.  Try again with another '--vp 1' option.


But it doesn't work if the recursion is not the first token:

$ stap -p1 -e 'probe begin {$1}' 'x $1'
(runs until OOM)

-- 
           Summary: argument expansion needs better recursion protection
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: jistone at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=11195

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