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-rw-r--r--generic/tclCmdMZ.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/tclCmdMZ.c b/generic/tclCmdMZ.c
index 6fd468c..d106f53 100644
--- a/generic/tclCmdMZ.c
+++ b/generic/tclCmdMZ.c
@@ -2086,7 +2086,7 @@ StringRangeCmd(
* Unicode string rep to get the range.
*/
- if (objv[1]->typePtr == &tclByteArrayType) {
+ if (objv[1]->typePtr == &tclByteArrayType && (objv[1]->bytes==NULL)) {
string = Tcl_GetByteArrayFromObj(objv[1], &length);
length--;
} else {