Index: generic/tclEvent.c
===================================================================
RCS file: /cvsroot/tcl/tcl/generic/tclEvent.c,v
retrieving revision 1.69
diff -u -r1.69 tclEvent.c
--- generic/tclEvent.c 13 Nov 2006 08:23:07 -0000 1.69
+++ generic/tclEvent.c 27 Feb 2007 17:25:37 -0000
@@ -200,11 +200,16 @@
int code, prefixObjc;
Tcl_Obj **prefixObjv, **tempObjv;
+ /*
+ * Note we copy the handler command prefix each pass through, so
+ * we do support one handler setting another handler.
+ */
+
+ Tcl_Obj *copyObj = TclListObjCopy(NULL, assocPtr->cmdPrefix);
+
errPtr = assocPtr->firstBgPtr;
- Tcl_IncrRefCount(assocPtr->cmdPrefix);
- Tcl_ListObjGetElements(NULL, assocPtr->cmdPrefix, &prefixObjc,
- &prefixObjv);
+ Tcl_ListObjGetElements(NULL, copyObj, &prefixObjc, &prefixObjv);
tempObjv = (Tcl_Obj **) ckalloc((prefixObjc+2)*sizeof(Tcl_Obj *));
memcpy(tempObjv, prefixObjv, prefixObjc*sizeof(Tcl_Obj *));
tempObjv[prefixObjc] = errPtr->errorMsg;
@@ -216,7 +221,7 @@
* Discard the command and the information about the error report.
*/
- Tcl_DecrRefCount(assocPtr->cmdPrefix);
+ Tcl_DecrRefCount(copyObj);
Tcl_DecrRefCount(errPtr->errorMsg);
Tcl_DecrRefCount(errPtr->returnOpts);
assocPtr->firstBgPtr = errPtr->nextPtr;
