Merge remote-tracking branch 'origin/5.7' into dev

Conflicts:
	configure
5.7 now supports clang on android; but dev re-worked configure

	src/gui/kernel/qevent.h
One side renamed a parameter of a constructor; the other added an
alternate constructor on the next line.  Applied the rename to both
for consistency.

	tests/auto/tools/moc/tst_moc.cpp
Each side added a new test at the end.

	.qmake.conf
Ignored 5.7's change to MODULE_VERSION.

	configure.json
No conflict noticed by git; but changes in 5.7 were needed for the
re-worked configure to accommodate 5.7's stricter handling of C++11.

Change-Id: I9cda53836a32d7bf83828212c7ea00b1de3e09d2

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/auto/corelib/tools/qvector/tst_qvector.cpp b/tests/auto/corelib/tools/qvector/tst_qvector.cpp
index 825cb05d74..374fec221e 100644
--- a/tests/auto/corelib/tools/qvector/tst_qvector.cpp
+++ b/tests/auto/corelib/tools/qvector/tst_qvector.cpp
@@ -271,6 +271,7 @@ private slots:
     void testOperators() const;
 
     void reserve();
+    void reserveZero();
     void reallocAfterCopy_data();
     void reallocAfterCopy();
     void initializeListInt();
@@ -2365,13 +2366,34 @@ void tst_QVector::reserve()
     {
         QVector<Foo> a;
         a.resize(2);
+        QCOMPARE(fooCtor, 2);
         QVector<Foo> b(a);
         b.reserve(1);
         QCOMPARE(b.size(), a.size());
+        QCOMPARE(fooDtor, 0);
     }
     QCOMPARE(fooCtor, fooDtor);
 }
 
+// This is a regression test for QTBUG-51758
+void tst_QVector::reserveZero()
+{
+    QVector<int> vec;
+    vec.detach();
+    vec.reserve(0); // should not crash
+    QCOMPARE(vec.size(), 0);
+    QCOMPARE(vec.capacity(), 0);
+    vec.squeeze();
+    QCOMPARE(vec.size(), 0);
+    QCOMPARE(vec.capacity(), 0);
+    vec.reserve(-1);
+    QCOMPARE(vec.size(), 0);
+    QCOMPARE(vec.capacity(), 0);
+    vec.append(42);
+    QCOMPARE(vec.size(), 1);
+    QVERIFY(vec.capacity() >= 1);
+}
+
 // This is a regression test for QTBUG-11763, where memory would be reallocated
 // soon after copying a QVector.
 void tst_QVector::reallocAfterCopy_data()