[Bug translator/13317] New: improve parse error recovery heuristics

[fche at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13317

             Bug #: 13317
           Summary: improve parse error recovery heuristics
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap@sourceware.org
        ReportedBy: fche@redhat.com
    Classification: Unclassified


When we encounter a parse error, some bits of code try to skip some input
tokens heuristically, to restart the parser, to try to supply extra error
messages.  In practice, this often produces a cascade of misleading messages.
Let's change this to err on the side of fewer messages and top level
restart points.

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