Valgrind: Tcl_NewStringObj leading to "Uninitialised value was created by a heap allocation"

==17987== Conditional jump or move depends on uninitialised value(s)
==17987==    at 0x48859CC: ObjectDispatch (nsf.c:15600)
==17987==    by 0x4860DEC: CallMethod (nsf.c:1255)
==17987==    by 0x48A925C: NsfParameterSpecsCmd (nsf.c:30457)
==17987==    by 0x487BDD8: NsfParameterSpecsCmdStub (nsfAPI.h:2574)
==17987==    by 0x4946E25: Dispatch (tclBasic.c:4461)
==17987==    by 0x4946EAF: TclNRRunCallbacks (tclBasic.c:4497)
==17987==    by 0x4884AC7: MethodDispatchCsc (nsf.c:14934)
==17987==    by 0x4886A46: ObjectDispatch (nsf.c:16076)
==17987==    by 0x4860DEC: CallMethod (nsf.c:1255)
==17987==    by 0x48ABC7D: ComputeParameterDefinition (nsf.c:31528)
==17987==    by 0x48AC06B: GetObjectParameterDefinition (nsf.c:31668)
==17987==    by 0x48ACA37: NsfOConfigureMethod (nsf.c:31908)
==17987==  Uninitialised value was created by a heap allocation
==17987==    at 0x4842839: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==17987==    by 0x493AC6C: TclpAlloc (tclAlloc.c:699)
==17987==    by 0x4954C3F: Tcl_Alloc (tclCkalloc.c:1059)
==17987==    by 0x4AA0A46: Tcl_NewStringObj (tclStringObj.c:287)
==17987==    by 0x48B5F6B: Nsf_Init (nsf.c:35917)
==17987==    by 0x4A764DB: Tcl_LoadObjCmd (tclLoad.c:464)
==17987==    by 0x4946E25: Dispatch (tclBasic.c:4461)
==17987==    by 0x4946EAF: TclNRRunCallbacks (tclBasic.c:4497)
==17987==    by 0x494674B: Tcl_EvalObjv (tclBasic.c:4220)
==17987==    by 0x4948D95: TclEvalEx (tclBasic.c:5366)
==17987==    by 0x4A6C708: Tcl_FSEvalFileEx (tclIOUtil.c:1824)
==17987==    by 0x4A78094: Tcl_MainEx (tclMain.c:403)