diff -r 56cd8111b7f7 -r 41300fa6a67c tests/auto/qvector/tst_qvector.cpp
--- a/tests/auto/qvector/tst_qvector.cpp	Tue Jan 26 12:42:25 2010 +0200
+++ b/tests/auto/qvector/tst_qvector.cpp	Tue Feb 02 00:43:10 2010 +0200
@@ -56,6 +56,7 @@
 
 private slots:
     void outOfMemory();
+    void QTBUG6416_reserve();
 };
 
 int fooCtor;
@@ -220,5 +221,18 @@
     }
 }
 
+void tst_QVector::QTBUG6416_reserve()
+{
+    fooCtor = 0;
+    fooDtor = 0;
+    {
+        QVector<Foo> a;
+        a.resize(2);
+        QVector<Foo> b(a);
+        b.reserve(1);
+    }
+    QCOMPARE(fooCtor, fooDtor);
+}
+
 QTEST_APPLESS_MAIN(tst_QVector)
 #include "tst_qvector.moc"