Rene Brun
Petar Maksimovic wrote:
>
> Hi Rene,
>
> my previous example (after your fixes) still causes problems, and
> can be boiled down to:
>
> ------------8<---------------------------------------------------------
> // file: test.C
> //____________________________________________________________________________
> // tfun1() is used in TF2 constructor and called by TF2.Draw()
> //
> Double_t tfun1(Double_t* x, Double_t* par)
> {
> Double_t res;
>
> // Uncomment one of the following two lines. The second one
> // will cause TF2::Draw() to never execute this function.
> //Double_t xe[4]; // ***** THIS WORKS ON SGI *****
> Double_t xe[4] = {0.0, 0.0, 0.0, 0.0}; // ***** THIS DOESN'T *****
>
> xe[0] = x[0] + 0.845;
> xe[1] = x[0] * x[1] * 0.246;
> xe[2] = 0.941;
>
> res = xe[0]+xe[1]+xe[2];
>
> printf("Result = %f\n", res);
> return res;
> }
> ------------8<---------------------------------------------------------
>
> I execute it by typing:
>
> root [0] .L test.C
> root [1] TF2 *f2 = new TF2("t",tfun1,0.,1.,0.,1.,0);
> root [2] f2->Draw();
>
> The problem is caused by the line
>
> Double_t xe[4] = {0.0, 0.0, 0.0, 0.0};
>
> If "= {0.0, 0.0, 0.0, 0.0}" is removed, it works fine on IRIX 6.2.
> However, on Linux (RedHat 5.0) it bombs with
>
> Error: Array index out of range xe+1082958485 valid upto xe[3] FILE:/home/petar/root/./test.C LINE:5
> Error: Array index out of range xe+1083297580 valid upto xe[3] FILE:/home/petar/root/./test.C LINE:5
> Error: Array index out of range xe+1082958638 valid upto xe[3] FILE:/home/petar/root/./test.C LINE:5
>
> Both IRIX and Linux versions of root are 2.00/05.
>
> On the other hand, if "= {0.0, 0.0, 0.0, 0.0}" is included, the function
> tfun1 is never called by TF2::Draw()! (This happens on both IRIX 6.2
> and Linux RH 5.0.)
>
> Let me know what other kind of information I can provide (machine or OS
> details, etc.)
>
> Thanks a lot!
>
> Petar
>
> P.S. Ultimately, I wouldn't mind CINT refusing to handle some cases, but it
> would, at least, be nice that it informs the user what it's doing...