CGAL users discussion list

[Andrei Zaharescu <>]

Hey Sylvain,

I tried commenting out that pre-condition.. and now the code got stuck in another one...

CGAL error: assertion violation!

Expr: result

File: ../../include/CGAL/Regular_triangulation_2.h

Line: 760

terminate called after throwing an instance of 'std::logic_error'

  what():  basic_string::_S_construct NULL not valid

Abort trap

I will try installing GCC 4.2 via fink and give it a go...I've been meaning to do so for quite some time.. in order to try some

OpenMP stuff .. now i'm motivated even more :)

thanks,

Andrei.

Andrei Zaharescu a écrit :

Hi everybody,

I am encountering an error when using the CGAL library compiled with optimization flags on mac intel (with -O1 or -O2 or -O3).

Basically, if I try the provided examples from:

/examples/Triangulation_2/regular

I get some precondition violations. This does not happen when no optimization flags are being used.

Thanks in advance to everyone. The error occurs when invoking the    rt.is_valid() command.

CGAL error: precondition violation!

Expr: it1.e_ == it2.e_

File: ../../include/CGAL/iterator.h

Line: 563

Explanation:

terminate called after throwing an instance of 'CGAL::Precondition_exception'

  what():  CGAL ERROR: precondition violation!

Expr: it1.e_ == it2.e_

File: ../../include/CGAL/iterator.h

Line: 563

Abort trap

I can reproduce it in the same conditions.

Note that with g++ 4.2 (easily installed with Fink), it works, though.

I have no clue what can happen, don't have enough to dig into this.

I'd suggest you uncomment the precondition, it's not an important one.

Maybe a compiler bug...

-- 

Sylvain Pion

INRIA Sophia-Antipolis

Geometrica Project-Team

CGAL, http://cgal.org/

-- 

Andrei Zaharescu

Web: http://www.uncaughtexceptions.com

Phd Candidate

INRIA Rhone-Alpes 

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