2 files changed, 7 insertions, 0 deletions
diff --git a/src/qml/compiler/qqmlirbuilder.cpp b/src/qml/compiler/qqmlirbuilder.cpp
index 0316e54c09..1f2e59b55e 100644
--- a/src/qml/compiler/qqmlirbuilder.cpp
+++ b/src/qml/compiler/qqmlirbuilder.cpp
@@ -549,6 +549,12 @@ bool IRBuilder::visit(QQmlJS::AST::UiInlineComponent *ast)
         recordError(ast->firstSourceLocation(), QLatin1String("Nested inline components are not supported"));
         return false;
     }
+    if (inlineComponentsNames.contains(ast->name.toString())) {
+        recordError(ast->firstSourceLocation(), QLatin1String("Inline component names must be unique per file"));
+        return false;
+    } else {
+        inlineComponentsNames.insert(ast->name.toString());
+    }
     {
         QScopedValueRollback<bool> rollBack {insideInlineComponent, true};
         if (!defineQMLObject(&idx, ast->component))
diff --git a/src/qml/compiler/qqmlirbuilder_p.h b/src/qml/compiler/qqmlirbuilder_p.h
index 1f2c11f7f3..254d21001b 100644
--- a/src/qml/compiler/qqmlirbuilder_p.h
+++ b/src/qml/compiler/qqmlirbuilder_p.h
@@ -543,6 +543,7 @@ public:
     QList<QQmlJS::DiagnosticMessage> errors;
 
     QSet<QString> illegalNames;
+    QSet<QString> inlineComponentsNames;
 
     QList<const QV4::CompiledData::Import *> _imports;
     QList<Pragma*> _pragmas;