qmllint: Complain about "target" when complaining about PropertyChanges

You should remove the binding on the target property, too, after
rephrasing the binding.

Fixes: QTBUG-113695
Change-Id: I917f506c932605ae5851ae09f4383af59a3cae1e
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
(cherry picked from commit 7bc52d660c692bf727c1741e1b9981e5b337f45f)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit 3dff3ce1bd38fff8103d565590120d5f746c180a)
(cherry picked from commit c753d52d8ed56f3d49b0333a99dd47d57fdad8a1)

2 files changed, 15 insertions, 1 deletions

diff --git a/src/plugins/qmllint/quick/quicklintplugin.cpp b/src/plugins/qmllint/quick/quicklintplugin.cpp
index b026fd96a1..afed093269 100644
--- a/src/plugins/qmllint/quick/quicklintplugin.cpp
+++ b/src/plugins/qmllint/quick/quicklintplugin.cpp
@@ -761,11 +761,13 @@ void PropertyChangesValidatorPass::run(const QQmlSA::Element &element)
         return;
 
     QString targetId = u"<id>"_s;
-    const QString targetBinding = sourceCode(target->sourceLocation());
+    const auto targetLocation = target->sourceLocation();
+    const QString targetBinding = sourceCode(targetLocation);
     const QQmlSA::Element targetElement = resolveIdToElement(targetBinding, element);
     if (!targetElement.isNull())
         targetId = targetBinding;
 
+    bool hadCustomParsedBindings = false;
     for (auto it = bindings.begin(), end = bindings.end(); it != end; ++it) {
         const QString name = it->propertyName();
         if (element->hasProperty(name))
@@ -783,12 +785,19 @@ void PropertyChangesValidatorPass::run(const QQmlSA::Element &element)
         if (binding.length() > 16)
             binding = binding.left(13) + "..."_L1;
 
+        hadCustomParsedBindings = true;
         emitWarning(
                 "Property \"%1\" is custom-parsed in PropertyChanges. "
                 "You should phrase this binding as \"%2.%1: %3\""_L1
                     .arg(name, targetId, binding),
                 quickPropertyChangesParsed, bindingLocation);
     }
+
+    if (hadCustomParsedBindings && !targetElement.isNull()) {
+        emitWarning("You should remove any bindings on the \"target\" property and avoid "
+                    "custom-parsed bindings in PropertyChanges.",
+                    quickPropertyChangesParsed, targetLocation);
+    }
 }
 
 QT_END_NAMESPACE
diff --git a/tests/auto/qml/qmllint/tst_qmllint.cpp b/tests/auto/qml/qmllint/tst_qmllint.cpp
index 8b8c9c2d2f..e6354a39cd 100644
--- a/tests/auto/qml/qmllint/tst_qmllint.cpp
+++ b/tests/auto/qml/qmllint/tst_qmllint.cpp
@@ -2025,6 +2025,11 @@ void TestQmllint::quickPlugin()
                       12, 30
                 },
                 Message {
+                      u"You should remove any bindings on the \"target\" property and avoid "
+                       "custom-parsed bindings in PropertyChanges."_s,
+                      11, 29
+                },
+                Message {
                       u"Unknown property \"notThere\" in PropertyChanges."_s,
                       13, 31
                 }