Errors, bugs, questions - page 2158

[Konstantin]

who knows how to remove artifacts:

MT5 v1755, wine v3.2, OS Ubuntu 16.04 x64

[Vladimir Pastushak]

fxsaber:

It's all unnecessary for trading ...

The only way it will be used is to create your own story create a grail and mess with people's minds ...

[fxsaber]

Vladimir Pastushak:

It's all unnecessary for trading ...

The only way it will be used is to create your own story create a grail and mess with people's minds ...

Yes, that's a popular opinion.

[Vladimir Pastushak]

See what this bug is and how to deal with it ?

[Konstantin]

Vladimir Pastushak:

See what this bug is and how to deal with it ?

see event model

[A100]

Execution error: invalid pointer access in

class A {};
class B : public A {};
void OnStart()
{
        A *a = new B;
        delete a;
        B *b = a;
}

Otherwise:

void OnStart()
{
        A *a;
        delete a;
        B *b = a;
}

fine. What's the difference?

[Sergey Dzyublik]

A100:

Execution error: invalid pointer access in

Otherwise:

fine. What's the difference?

In the first case, after deletion, the address of the deleted object remains.
In the second case it is NULL.

B *b = a;
A type conversion check is carried out which causes an exception for the deleted object.

[A100]

Sergey Dzyublik:

A type feasibility check is performed, which causes an exception for the deleted object.

The check takes place at compile time and the error occurs at runtime

and moreover such a check

        B *b = dynamic_cast<B *>( a ); //нормально

does not raise an exception for a deleted object

[Aleksey Vyazmikin]

Vladimir Pastushak:

See what this bug is and how to deal with it ?

A similar problem occurs if you take a graphical object located on past bars and scroll with the mouse wheel or the PageDown button.

[Sergey Dzyublik]

It has been reported that MT5 - 1758 of 29.01.2018 should be available.
Does anyone have that version?
I have MetaQuotes-Demo giving out maximum MT5 -1755