id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,difficulty 142,move-memory! accepts negative offsets,Jim Ursetto,felix winkelmann,"And will clobber memory. It does detect the error when the offsets are too large though. {{{ (define b (string->blob (make-string 10 #\nul))) (move-memory! ""foo"" b 3 0 7) ; ok ,d b blob of size 10: 0: 00 00 00 00 00 00 00 66 6f 6f .......foo (move-memory! ""foo"" b 3 0 8) ; error (out of range) (move-memory! ""xyz"" b 3 -1 0) ; succeeds ,d b blob of size 10: 0: 42 78 79 00 00 00 00 66 6f 6f Byz....foo (move-memory! ""xyz"" b 3 0 -1) ; succeeds ,d b unknown object }}}",defect,closed,major,,core libraries,4.2.x,fixed,,,