I'm getting a segfault on the current development branch of sage (see below). Is this a known issue and/or effecting anyone else?
This does not happen for me in Sage 7.3, although it does happen if I try to go "back in time" with a 'git checkout 7.3' and then rebuild. So just to be certain I built a few copies from scratch. This is from a doctest in src/doc/*/a_tour_of_sage/index.rst, easily reproducible. (Notice the * there. I guess Sage separately tests the documentation in each language...) sage: m = random_matrix(RDF,500) sage: m.eigenvalues() ------------------------------------------------------------------------ /data/home/jb12407/sources/sage/local/lib/python2.7/site-packages/cysignals/signals.so(+0x4635)[0x7f6d34da4635] /data/home/jb12407/sources/sage/local/lib/python2.7/site-packages/cysignals/signals.so(+0x4685)[0x7f6d34da4685] /data/home/jb12407/sources/sage/local/lib/python2.7/site-packages/cysignals/signals.so(+0x7107)[0x7f6d34da7107] /lib64/libpthread.so.0[0x30f700f7e0] /data/home/jb12407/sources/sage/local/lib/libopenblas.so.0(daxpy_k+0x48)[0x7f6d29e9eab8] /data/home/jb12407/sources/sage/local/lib/libopenblas.so.0(+0xc9c3e)[0x7f6d29ca9c3e] /data/home/jb12407/sources/sage/local/lib/libopenblas.so.0(exec_blas+0xd9)[0x7f6d29e590f9] /data/home/jb12407/sources/sage/local/lib/libopenblas.so.0(dtrmv_thread_NLU+0x204)[0x7f6d29ca9f34] /data/home/jb12407/sources/sage/local/lib/libopenblas.so.0(dtrmv_+0x155)[0x7f6d29c67b75] /data/home/jb12407/sources/sage/local/lib/libopenblas.so.0(dlahr2_+0x451)[0x7f6d2a0eecb1] /data/home/jb12407/sources/sage/local/lib/libopenblas.so.0(dgehrd_+0x47d)[0x7f6d2a0b6c8d] /data/home/jb12407/sources/sage/local/lib/libopenblas.so.0(dgeev_+0x430)[0x7f6d2a0b1470] /data/home/jb12407/sources/sage/local/lib/python2.7/site-packages/scipy/linalg/_flapack.so(+0x2cde7)[0x7f66808b4de7] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7f6d4244aed3] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x388a)[0x7f6d424fd5ba] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x81c)[0x7f6d4250066c] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5654)[0x7f6d424ff384] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x81c)[0x7f6d4250066c] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(+0x839fc)[0x7f6d4247b9fc] /data/home/jb12407/sources/sage/local/lib/python2.7/site-packages/sage/matrix/matrix_double_dense.so(+0x9949)[0x7f6682759949] /data/home/jb12407/sources/sage/local/lib/python2.7/site-packages/sage/matrix/matrix_double_dense.so(+0x5161b)[0x7f66827a161b] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5331)[0x7f6d424ff061] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x81c)[0x7f6d4250066c] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCode+0x19)[0x7f6d42500789] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x509e)[0x7f6d424fedce] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x81c)[0x7f6d4250066c] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5654)[0x7f6d424ff384] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x81c)[0x7f6d4250066c] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5654)[0x7f6d424ff384] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x81c)[0x7f6d4250066c] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5654)[0x7f6d424ff384] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x81c)[0x7f6d4250066c] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5654)[0x7f6d424ff384] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x81c)[0x7f6d4250066c] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5654)[0x7f6d424ff384] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x81c)[0x7f6d4250066c] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5654)[0x7f6d424ff384] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x81c)[0x7f6d4250066c] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCode+0x19)[0x7f6d42500789] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyRun_FileExFlags+0x8a)[0x7f6d42523e5a] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(PyRun_SimpleFileExFlags+0xd7)[0x7f6d42525207] /data/home/jb12407/sources/sage/local/lib/libpython2.7.so.1.0(Py_Main+0xc3e)[0x7f6d4253b70e] /lib64/libc.so.6(__libc_start_main+0xfd)[0x30f6c1ed1d] python[0x4006f1] ------------------------------------------------------------------------ Attaching gdb to process id 56935. GNU gdb (GDB) Red Hat Enterprise Linux (7.2-90.el6) Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html > This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. (gdb) Hangup detected on fd 0 error detected on stdin Your system GDB is an old version that does not work with pipes Install gdb for enhanced tracebacks. ------------------------------------------------------------------------ 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(). 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