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authormig <mig>2011-04-13 13:09:19 (GMT)
committermig <mig>2011-04-13 13:09:19 (GMT)
commitcb46d8443010d208077152c70a8d11ea8f10ba9e (patch)
tree13523f8aaf8376791660f1b2b620a68cf75c470a /generic
parentff0935637a41961249473d9d1a77214f0de7c696 (diff)
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fix for [Bug 2662380], crash caused by appending to a variable with a write trace that unsets it
Diffstat (limited to 'generic')
-rw-r--r--generic/tclVar.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/generic/tclVar.c b/generic/tclVar.c
index 3312191..a434bae 100644
--- a/generic/tclVar.c
+++ b/generic/tclVar.c
@@ -2699,7 +2699,8 @@ Tcl_AppendObjCmd(dummy, interp, objc, objv)
varValuePtr = TclPtrSetVar(interp, varPtr, arrayPtr, part1, NULL,
objv[i], (TCL_APPEND_VALUE | TCL_LEAVE_ERR_MSG));
- if (varValuePtr == NULL) {
+ if ((varValuePtr == NULL) ||
+ (varValuePtr == ((Interp *) interp)->emptyObjPtr)) {
return TCL_ERROR;
}
}