case patterns that begin with some keywords aren't matched correctly

Binary package hint: csh

I encountered this bug when running Ubuntu 10.04 and csh version 20070713-2ubuntu1.

Look at the following code snippet:

  switch ($ARG)
    case ifort:
      echo "Your arg was ifort"
      breaksw
    default:
      echo "Your arg was not ifort"
      breaksw
  endsw

I expected the first case pattern to be matched when ARG=ifort, but it was not. The first case pattern is matched when ARG=if.

Similar behavior was observed when the case pattern began with switch. All patterns behaved as expected when encased in quotes.