[odb-users] libc++abi.dylib: terminating with uncaught foreign exception

[Adnan RIHAN]

Hi there,

I sometimes have this error (libc++abi.dylib: terminating with uncaught exception) and last time it was because ODB was trying to cast 2 types it didn’t know... I don’t remember exactly but I removed this error by changing this line in my program (cleaned example):

> QSharedPointer<Object>    obj1(new Object(...));
> QSharedPointer<Object>    obj2(obj1);
>
> return (obj1 == obj2);

by

> QSharedPointer<Object>    obj1(new Object(...));
> QSharedPointer<Object>    obj2(obj1);
>
> return (*obj1->data() == *obj2->data());

The thing strange is that QSharedPointer::operator==() checks if the internal pointers are the same. But I don’t remember why, changing to the 2nd block (which is what I wanted because my Object::operator==() really checks the equality) removed the runtime error.
---------------------
Today I’m in another situation, the “uncaught” exception is now “uncaught foreign exception” and I can’t find an exception related to “foreign keys”.

Here is my code and the line prepended with “**” which causes the exception:

> [...] // Some Qt’s headers
> # include   <odb/database.hxx>
> # include   <odb/qt/list.hxx>
> # include   <odb/session.hxx>
> # include   <odb/transaction.hxx>
> 
> class EntityManager : public QObject
> {
>     [...]
>     template                        <typename T>
>     QOdbList<QSharedPointer<T> >    all(void)
>     {
>         QOdbList<QSharedPointer<T> >    list;
> 
>         try {
>             odb::session        s;
>             odb::transaction    t(this->m_db->begin());
>             qDebug() << "Before query”; // SHOWN
> **          odb::result<T>      r(this->m_db->query<T>()); 
>             qDebug() << "After query”; // exception before this line
> 
>             for (typename odb::result<T>::iterator i(r.begin()); i != r.end(); ++i) {
>                 list.append(QSharedPointer<T>(new T(*i)));
>             }
> 
>             t.commit();
>         } catch (const odb::exception &e) {
>             qDebug() << "ODB Exception:" << e.what();
>         }
> 
>         return (list);
>     }
> }

Here is my “Object” containing the foreign key:

> [...] // Some Qt’s headers
> # include   <odb/core.hxx>
> # include   "../AbstractModel.hpp"
> # include   "../Product/Product.hpp"
> class Offer : public AbstractModel
> {
>     [...]
>     private:
>         quint8                     m_id;
>         QSharedPointer<Product>    m_product;
>         float                      m_price;
> }

Here is my odb command line for the concerned class:
> odb --changelog apps/LGC/schemas/odb-changelog.xml -d sqlite -p qt -q -s --schema-name LGC -o apps/LGC/src/Models/Product apps/LGC/src/Models/Product/Product.hpp 2>&1
> odb --changelog apps/LGC/schemas/odb-changelog.xml -d sqlite -p qt -q -s --schema-name LGC -o apps/LGC/src/Models/Offer apps/LGC/src/Models/Offer/Offer.hpp 2>&1

Any idea?
--  
Cordialement, Adnan RIHAN.
Directeur-Gérant de Eolis-Software, société de services informatiques.  

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