diff options
Diffstat (limited to 'generic/tclLink.c')
| -rw-r--r-- | generic/tclLink.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/generic/tclLink.c b/generic/tclLink.c index df8b16a..f7911a4 100644 --- a/generic/tclLink.c +++ b/generic/tclLink.c @@ -112,6 +112,14 @@ Tcl_LinkVar( Link *linkPtr; int code; + linkPtr = (Link *) Tcl_VarTraceInfo(interp, varName, TCL_GLOBAL_ONLY, + LinkTraceProc, (ClientData) NULL); + if (linkPtr != NULL) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "variable '%s' is already linked", varName)); + return TCL_ERROR; + } + linkPtr = (Link *) ckalloc(sizeof(Link)); linkPtr->interp = interp; linkPtr->varName = Tcl_NewStringObj(varName, -1); |