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-rw-r--r--generic/tkTextDisp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/tkTextDisp.c b/generic/tkTextDisp.c
index 371e910..03d11e1 100644
--- a/generic/tkTextDisp.c
+++ b/generic/tkTextDisp.c
@@ -7561,7 +7561,7 @@ TkTextCharLayoutProc(
ciPtr = &bciPtr->ci;
} else {
bciPtr = baseCharChunkPtr->clientData;
- ciPtr = ckalloc(sizeof(CharInfo));
+ ciPtr = ckalloc(Tk_Offset(CharInfo, chars) + 1);
baseString = &bciPtr->baseChars;
}