valgrind log

==3378== Invalid read of size 4
==3378==    at 0x4F9AF8A: TclOOGetCallContext (tclOOCall.c:680)
==3378==    by 0x4F97D53: TclOOObjectCmdCore (tclOO.c:1903)
==3378==    by 0x4F979FE: PrivateObjectCmd (tclOO.c:1800)
==3378==    by 0x404F1EA: TclEvalObjvInternal (tclBasic.c:3645)
==3378==    by 0x40AD0EA: TclExecuteByteCode (tclExecute.c:2327)
==3378==    by 0x4119AA6: TclObjInterpProcCore (tclProc.c:1721)
==3378==    by 0x4FA306B: InvokeProcedureMethod (tclOOMethod.c:730)
==3378==    by 0x4F9A768: TclOOInvokeContext (tclOOCall.c:219)
==3378==    by 0x4F966A7: Tcl_NewObjectInstance (tclOO.c:1243)
==3378==    by 0x4F98180: ClassCreate (tclOO.c:2034)
==3378==    by 0x4FA261A: BasicMethodInvoke (tclOOMethod.c:323)
==3378==    by 0x4F9A768: TclOOInvokeContext (tclOOCall.c:219)
==3378==  Address 0x53528C4 is 76 bytes inside a block of size 116 free'd
==3378==    at 0x402237F: free (vg_replace_malloc.c:233)
==3378==    by 0x404A987: TclpFree (tclAlloc.c:729)
==3378==    by 0x405725A: Tcl_DbCkfree (tclCkalloc.c:633)
==3378==    by 0x411701C: Tcl_Release (tclPreserve.c:230)
==3378==    by 0x4F94BBC: ObjectRenamedTrace (tclOO.c:582)
==3378==    by 0x404E11F: CallCommandTraces (tclBasic.c:2914)
==3378==    by 0x404DDC0: Tcl_DeleteCommandFromToken (tclBasic.c:2737)
==3378==    by 0x404D553: TclRenameCommand (tclBasic.c:2238)
==3378==    by 0x40680A5: Tcl_RenameObjCmd (tclCmdMZ.c:858)
==3378==    by 0x404F1EA: TclEvalObjvInternal (tclBasic.c:3645)
==3378==    by 0x40AD0EA: TclExecuteByteCode (tclExecute.c:2327)
==3378==    by 0x40AA545: TclCompEvalObj (tclExecute.c:1473)