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-rw-r--r--generic/tclVar.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/generic/tclVar.c b/generic/tclVar.c
index a6f6cf4..33071ae 100644
--- a/generic/tclVar.c
+++ b/generic/tclVar.c
@@ -3914,7 +3914,8 @@ Tcl_GetVariableFullName(
} else if (iPtr->varFramePtr->procPtr) {
int index = varPtr - iPtr->varFramePtr->compiledLocals;
- if (index < iPtr->varFramePtr->numCompiledLocals) {
+ if (index >= 0
+ && index < iPtr->varFramePtr->numCompiledLocals) {
namePtr = localName(iPtr->varFramePtr, index);
Tcl_AppendObjToObj(objPtr, namePtr);
}