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-rw-r--r--generic/tclStringObj.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c
index 8437555..c3a0192 100644
--- a/generic/tclStringObj.c
+++ b/generic/tclStringObj.c
@@ -190,8 +190,8 @@ GrowUnicodeBuffer(
* Subsequent appends - apply the growth algorithm.
*/
- attempt = 2 * needed;
- if (attempt >= 0 && attempt <= STRING_MAXCHARS) {
+ if (needed <= STRING_MAXCHARS / 2) {
+ attempt = 2 * needed;
ptr = stringAttemptRealloc(stringPtr, attempt);
}
if (ptr == NULL) {