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-rw-r--r--generic/tclStringObj.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c
index d43cc45..0f238cf 100644
--- a/generic/tclStringObj.c
+++ b/generic/tclStringObj.c
@@ -418,12 +418,16 @@ Tcl_GetCharLength(
int numChars;
/*
- * Optimize the case where we're really dealing with a bytearray object
- * without string representation; we don't need to convert to a string to
- * perform the get-length operation.
+ * Optimize the case where we're really dealing with a bytearray object;
+ * we don't need to convert to a string to perform the get-length operation.
+ *
+ * NOTE that we do not need the bytearray to be "pure". A ByteArray value
+ * with a string rep cannot be trusted to represent the same value as the
+ * string rep, but it *can* be trusted to have the same character length
+ * as the string rep, which is all this routine cares about.
*/
- if (TclIsPureByteArray(objPtr)) {
+ if (objPtr->typePtr == &tclByteArrayType) {
int length;
(void) Tcl_GetByteArrayFromObj(objPtr, &length);