changes in sbcl-1.4.13 relative to sbcl-1.4.12:
* minor incompatible change: PRINT-TYPE and PRINT-TYPE-SPECIFIER are not
exported from SB-EXT. These were never announced, so this change would
only affects users who discovered these undocumented functions.
* enhancement: SB-EXT:SEARCH-ROOTS and SB-EXT:GC-AND-SEARCH-ROOTS
are supported on all backends that use gencgc.