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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 e7c7152..e159f67 100644
--- a/generic/tclCmdMZ.c
+++ b/generic/tclCmdMZ.c
@@ -282,7 +282,7 @@ Tcl_RegexpObjCmd(
* start of the string unless the previous character is a newline.
*/
- if ((offset == 0) || ((offset > 0) &&
+ if ((offset == 0) || ((offset > 0) && (offset < stringLength) &&
(Tcl_GetUniChar(objPtr, offset-1) == (Tcl_UniChar) '\n'))) {
eflags = 0;
} else {