Fix correct handle a final measurement formula error when exporting a pattern recipe.

Valentina must not crash.

ChangeLog.txt

@@ -8,6 +8,7 @@
 - Remember last selected export format.
 - [smart-pattern/valentina#123] Error inside Save layout dialog.
 - Improve error handling for the dxf export.
+- Fix correct handle a final measurement formula error when exporting a pattern recipe.
 
 # Version 0.7.46 Mar 31, 2021
 - Fix incorrect calculation of value for multisize measurements in Valentina.

src/app/valentina/mainwindow.cpp

@@ -34,6 +34,7 @@
 #include "../ifc/exception/vexceptionemptyparameter.h"
 #include "../ifc/exception/vexceptionwrongid.h"
 #include "../ifc/exception/vexceptionundo.h"
+#include "../ifc/exception/vexceptioninvalidhistory.h"
 #include "version.h"
 #include "core/vapplication.h"
 #include "../vmisc/customevents.h"
@@ -4819,12 +4820,19 @@ void MainWindow::CreateActions()
             return;
         }
 
+        try
+        {
             VPatternRecipe recipe(doc);
             QString error;
             if (not recipe.SaveDocument(fileName, error))
             {
                 qCWarning(vMainWindow, "%s", qUtf8Printable(tr("Could not save recipe. %1").arg(error)));
             }
+        }
+        catch (const VExceptionInvalidHistory &e)
+        {
+            qCCritical(vMainWindow, "%s", qUtf8Printable(tr("Could not create recipe file. %1").arg(e.ErrorMessage())));
+        }
     });
 
     connect(ui->actionNewDraw, &QAction::triggered, this, [this]()

src/libs/ifc/exception/vexception.cpp

@@ -41,7 +41,7 @@
  * @param error string with error
  */
 VException::VException(const QString &error) V_NOEXCEPT_EXPR (true)
-    :QException(), error(error), moreInfo(QString())
+    : error(error)
 {
     Q_ASSERT_X(not error.isEmpty(), Q_FUNC_INFO, "Error message is empty");
 }

src/libs/ifc/exception/vexception.h

@@ -64,7 +64,7 @@ protected:
     QString         error;
 
     /** @brief moreInfo more information about error */
-    QString         moreInfo;
+    QString         moreInfo {};
 
     QString         MoreInfo(const QString &detInfo) const;
 };

src/libs/vformat/vpatternrecipe.cpp

@@ -435,17 +435,26 @@ QDomElement VPatternRecipe::FinalMeasurement(const VFinalMeasurement &fm, const
     SetAttribute(recipeFinalMeasurement, QStringLiteral("formula"), fm.formula); // TODO: localize
 
     QScopedPointer<Calculator> cal(new Calculator());
+    try
+    {
         const qreal result = cal->EvalFormula(data.DataVariables(), fm.formula);
         if (qIsInf(result) || qIsNaN(result))
         {
             const QString errorMsg = QString("%1\n\n%1").arg(tr("Reading final measurements error."),
                                                              tr("Value for final measurtement '%1' is infinite or NaN. "
                                                                 "Please, check your calculations.").arg(fm.name));
-        VAbstractApplication::VApp()->IsPedantic() ? throw VException(errorMsg) :
-                                              qWarning() << VAbstractValApplication::warningMessageSignature + errorMsg;
+            VAbstractApplication::VApp()->IsPedantic() ? throw VException(errorMsg)
+                                                       : qWarning()
+                                                         << VAbstractValApplication::warningMessageSignature + errorMsg;
         }
 
         SetAttribute(recipeFinalMeasurement, QStringLiteral("value"), result);
+    }
+    catch (const qmu::QmuParserError &e)
+    {
+        throw VExceptionInvalidHistory(tr("Unable to create record for final measurement '%1'. Error: %2")
+                                       .arg(fm.name).arg(e.GetMsg()));
+    }
 
     return recipeFinalMeasurement;
 }