Just to inform that I installed the last distribution of Singular for Mac and this error occurred:
> ideal D3=(Pf(M3));
> list L;
Singular : signal 8 (v: 3150):
current line:>> q = facstd(i);<<
Segment fault/Bus error occurred (r:1351327351)
please inform the authors
trying to restart...
I tried again and the error didn't appear this time.
D3 is a very large not standard basis ideal (around one thousand generators) in a local ring ring with 11 variables which may split in 21 irreducible components.