diff --git a/src/qmljsc/CMakeLists.txt b/src/qmljsc/CMakeLists.txt
index 4030895..2b0575e 100644
--- a/src/qmljsc/CMakeLists.txt
+++ b/src/qmljsc/CMakeLists.txt
@@ -1,26 +1,26 @@
 find_package(Qt5 COMPONENTS Core Qml)
 
 set(libqmljsc_srcs
   compiler.cpp
-  error.h
+  error.cpp
   compilerpipeline.cpp
   compilerpass.cpp
   symboltable.cpp
   module.cpp
 
   ir/ir.cpp
 
   compilerpasses/parserpass.cpp
   compilerpasses/prettygeneratorpass.cpp
 )
 add_library(libqmljsc SHARED ${libqmljsc_srcs})
 qt5_use_modules(libqmljsc Core Qml)
 
 include_directories(${Qt5Qml_PRIVATE_INCLUDE_DIRS})
 
 set(qmljsc_srcs
     main.cpp
 )
 add_executable(qmljsc ${qmljsc_srcs})
 
 target_link_libraries(qmljsc libqmljsc)
diff --git a/src/qmljsc/error.cpp b/src/qmljsc/error.cpp
new file mode 100644
index 0000000..09e71c3
--- /dev/null
+++ b/src/qmljsc/error.cpp
@@ -0,0 +1,34 @@
+/*
+ * <one line to give the program's name and a brief idea of what it does.>
+ * Copyright (C) 2015  Anton Kreuzkamp <kde-development@akreuzkamp.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "error.h"
+
+using namespace QmlJSc;
+
+QDebug operator<<(QDebug dbg, const Error &error)
+{
+    dbg << error.what();
+
+    return dbg.space();
+}
+
+const char *QmlJSc::Error::what() const noexcept
+{
+    return qPrintable(description());
+}
diff --git a/src/qmljsc/error.h b/src/qmljsc/error.h
index 514b0e6..1942d88 100644
--- a/src/qmljsc/error.h
+++ b/src/qmljsc/error.h
@@ -1,94 +1,96 @@
 /*
  * Qml.js Compiler -  a QML to JS compiler bringing QML's power to the web.
  *
  * Copyright (C) 2015 Jan Marker <jan@jangmarker.de>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
 
 #ifndef ERROR_H
 #define ERROR_H
 
 #include <QtCore/QMetaType>
 #include <QtCore/QUrl>
 #include <QtCore/QString>
 #include <QtCore/QSharedPointer>
+#include <QtCore/QDebug>
 
 #include <exception>
 
 namespace QmlJSc {
 
 class Error : public std::exception
 {
 public:
     enum Type {
         UnknownError,
         ReadFileError,
         ParseError,
         ModuleImportError,
-        JSEngineError,
         SymbolLookupError
     };
 
     Error()
         : m_type(UnknownError)
         , m_column(-1)
         , m_line(-1)
         , m_reason(0)
     {}
     Error(Type type, QString description, Error *reason = 0)
         : m_type(type)
         , m_description(description)
         , m_column(-1)
         , m_line(-1)
         , m_reason(reason)
     {}
     virtual ~Error()
     {}
 
     Type type() const { return m_type; }
     void setType(Type type) { m_type = type; }
 
     QUrl file() const { return m_file; }
     void setFile(QUrl file) { m_file = file; }
 
     QString description() const { return m_description; }
     void setDescription(QString description) { m_description = description; }
 
     int column() const { return m_column; }
     void setColumn(int column) { m_column = column; }
 
     int line() const { return m_line; }
     void setLine(int line) { m_line = line; }
 
     Error *reason() const { return m_reason.data(); }
     void setReason(Error *reason) { m_reason.reset(reason); }
 
-    virtual const char* what() { return description().toLocal8Bit(); }
+    virtual const char* what() const noexcept;
 
 private:
     Type m_type;
     QUrl m_file;
     QString m_description;
     int m_column;
     int m_line;
     QSharedPointer<Error> m_reason;
 };
 
 }
 
+QDebug operator<<(QDebug dbg, const QmlJSc::Error &error);
+
 Q_DECLARE_METATYPE(QmlJSc::Error);
 
 #endif // ERROR_H