1 files changed, 1 insertions, 0 deletions
diff --git a/src/corelib/io/qurl.cpp b/src/corelib/io/qurl.cpp
index 3604648..bdb0cfd 100644
--- a/src/corelib/io/qurl.cpp
+++ b/src/corelib/io/qurl.cpp
@@ -3308,6 +3308,7 @@ static QString qt_ACE_do(const QString &domain, AceOperation op)
             qt_nameprep(&result, prevLen);
             labelLength = result.length() - prevLen;
             register int toReserve = labelLength + 4 + 6; // "xn--" plus some extra bytes
+            aceForm.resize(0);
             if (toReserve > aceForm.capacity())
                 aceForm.reserve(toReserve);
             toPunycodeHelper(result.constData() + prevLen, result.size() - prevLen, &aceForm);