Segmentation fault when saving certain empty matrices

[sagetrac-Stefan]

When saving a GF(4)-matrix with 0 rows or columns a segmentation fault is triggered:

sage: A = Matrix (GF(4,'a'),0,1)
sage: save(A, "/Users/svanzwam/Dropbox/test.sobj")
------------------------------------------------------------------------
0   signals.so                          0x000000011028d525 print_backtrace + 37
------------------------------------------------------------------------
Unhandled SIGSEGV: A segmentation fault occurred.
This probably occurred because a *compiled* module has a bug
in it and is not properly wrapped with sig_on(), sig_off().
Python will now terminate.
------------------------------------------------------------------------
Segmentation fault: 11

The behavior appears restricted to matrices over GF(2^k) for k > 1.

Component: linear algebra

Keywords: finite field, matrix, segmentation fault

Author: Mark Saaltink

Branch/Commit: cb30bfb

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/21669

[sagetrac-msaaltink]

Branch: u/msaaltink/segmentation_fault_when_saving_certain_empty_matrices

[sagetrac-msaaltink]

Commit: cb30bfb

[sagetrac-msaaltink]

Author: Mark Saaltink

[sagetrac-msaaltink]

New commits:

cb30bfb

Trac #21669: Segmentation fault when saving certain empty matrices

[tscrim]

comment:3

LGTM.

[tscrim]

Reviewer: Travis Scrimshaw

[vbraun]

Changed branch from u/msaaltink/segmentation_fault_when_saving_certain_empty_matrices to cb30bfb