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diff --git a/src/lib/corelib/tools/error.h b/src/lib/corelib/tools/error.h
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+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Build Suite.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#ifndef QBS_ERROR
+#define QBS_ERROR
+
+#include "codelocation.h"
+
+#include <QExplicitlySharedDataPointer>
+#include <QList>
+#include <QMetaType>
+#include <QSharedDataPointer>
+
+QT_BEGIN_NAMESPACE
+class QString;
+QT_END_NAMESPACE
+
+namespace qbs {
+class CodeLocation;
+
+class QBS_EXPORT ErrorItem
+{
+    friend class ErrorInfo;
+public:
+    ErrorItem();
+    ErrorItem(const ErrorItem &rhs);
+    ErrorItem &operator=(const ErrorItem &other);
+    ~ErrorItem();
+
+    QString description() const;
+    CodeLocation codeLocation() const;
+    QString toString() const;
+
+private:
+    ErrorItem(const QString &description, const CodeLocation &codeLocation);
+
+    class ErrorItemPrivate;
+    QExplicitlySharedDataPointer<ErrorItemPrivate> d;
+};
+
+class QBS_EXPORT ErrorInfo
+{
+public:
+    ErrorInfo();
+    ErrorInfo(const ErrorInfo &rhs);
+    ErrorInfo(const QString &description, const CodeLocation &location = CodeLocation(),
+              bool internalError = false);
+    ErrorInfo &operator=(const ErrorInfo &other);
+    ~ErrorInfo();
+
+    void append(const QString &description, const CodeLocation &location = CodeLocation());
+    void prepend(const QString &description, const CodeLocation &location = CodeLocation());
+    QList<ErrorItem> items() const;
+    bool hasError() const { return !items().isEmpty(); }
+    void clear();
+    QString toString() const;
+    bool isInternalError() const;
+
+private:
+    class ErrorInfoPrivate;
+    QSharedDataPointer<ErrorInfoPrivate> d;
+};
+
+} // namespace qbs
+
+Q_DECLARE_METATYPE(qbs::ErrorInfo)
+
+#endif // QBS_ERROR