Malloc() error on Ubuntu

General Discussion
1

Hello,
I’m using FreeFem on Ubuntu 20.04 and I have a strange issue.
I simply want to glue two meshes with the command “Th = Th1 + Th2”.
It returns the error
“malloc(): invalid size (unsorted)
Abandon (core dumped)”
I don’t understand why. The very same code runs properly on my Windows machine, so I guess it’s an Ubuntu issue…
Can anyone help me?!
Thanks a lot.
Lily

2

Hello Lily,
Could you please share your code?
Thanks.

3

Hello prj,

I have extracted the simplest code :
load “msh3”

mesh3 Th, Th1, Th2;

Th1 = readmesh3(“mesh1.mesh”);
Th2 = readmesh3(“mesh2.mesh”);

Th = Th1 + Th2;
savemesh(Th,“finalmesh.mesh”);

The meshes “mesh1.mesh” and “mesh2.mesh” were created with GMSH, then remeshed with MMG3D. They have respectively 30246 and 33342 tetrahedral elements.
Even with the simplest code above, I get the malloc error on Ubuntu and not on Windows. Otherwise, all my code run correctly on Ubuntu.

Thank you.

4

We need those meshes. Are they conforming?

5

Yes, they are conforming.

6

Upload them somewhere so we can reproduce the error, please.

8

What is your FreeFEM version?

9

I’m using FreeFem++ 4.1

10

Please update to the latest version, 4.7-1, there is no error there.

11

Ok, I will. Is there a way to have both versions on the same machine, or do I have to uninstall the version 4.1 and then install the version 4.7-1?

12

If you compile FreeFEM from sources, you can have two installations. Otherwise, I’m not sure.

13

There is no error with the version 4.7-1.
Thank you!