changes in sbcl-1.1.6 relative to sbcl-1.1.5:

  * enhancement: the continuable error when defknown-ing over extant
    fndb entries can be ignored by passing :overwrite-fndb-silently t
    as a keyword argument to sb-c:defknown (after attributes). Useful
    to allow defknown to be re-loaded. Use with :allow-other-keys t
    for backward compatibility.
  * optimization: compiler is much faster in compiling SVREF and (SETF SVREF)
    forms.
  * bug fix: Prevent a make-array transform from modifying source forms
    causing problems for inlined code. Thanks to Bart Botta.
    (regression since 1.0.42.11-bis)
  * bug fix: clear-output calls the correct gray stream routine,
    sb-gray:stream-clear-output. (lp#1153257)
  * bug fix: an error is signalled for an invalid format modifier: ~<~@>.
    (lp#1153148)
  * bug fix: Better error messages for package operations (lp#1154776)
  * bug fix: delete-package on a nonexistent package should signal a cerror.
    (regression since 1.0.37.44).
  * bug fix: accessing &MORE (stack allocated &REST) arguments checks bounds.
    (lp#1154946, lp#1072112)
  * bug fix: compiling make-array no longer signals an error when the
    element-type is an uknown type, a warning is issued instead.
    Thanks to James Kalenius (lp#1156095)
  * bug fix: SEARCH on generic (non-VECTOR non-LIST) sequence types no longer
    produces wrong results for some inputs.  (Thanks to Jan Moringen.)
    (lp#1153312)
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