It has been some time since my Sage stopped working properly. It seems symbolic computations needing libecls are broken:
sage: var('x')
x
sage: solve([x],x)
Internal or unrecoverable error in:
Got signal before environment was installed on our thread
[2: No such file or directory]
;;; ECL C Backtrace
;;; /usr/lib64/libecl.so.13.5(si_dump_c_backtrace+0x31) [0x7f30c79e45f1]
;;; /usr/lib64/libecl.so.13.5(ecl_internal_error+0x44) [0x7f30c79cd5c4]
;;; /usr/lib64/libecl.so.13.5(+0x1b8578) [0x7f30c79fa578]
;;; /lib64/libpthread.so.0(+0xfeb0) [0x7f3105cc5eb0]
;;; /usr/lib64/libgc.so.1(+0x8bcd) [0x7f30f2130bcd]
;;; /usr/lib64/libgc.so.1(+0x68eb) [0x7f30f212e8eb]
;;; /usr/lib64/libgc.so.1(+0x6c4e) [0x7f30f212ec4e]
;;; /usr/lib64/libgc.so.1(+0x13a94) [0x7f30f213ba94]
;;; /usr/lib64/libgc.so.1(+0x87d3) [0x7f30f21307d3]
;;; /usr/lib64/libgc.so.1(+0xd659) [0x7f30f2135659]
;;; /usr/lib64/libgc.so.1(GC_generic_malloc+0x47) [0x7f30f2135757]
;;; /usr/lib64/libgc.so.1(+0xdada) [0x7f30f2135ada]
;;; /usr/lib64/libecl.so.13.5(ecl_alloc_object+0x9b) [0x7f30c7a10f7b]
;;; /usr/lib64/libecl.so.13.5(init_threads+0x42) [0x7f30c7a0e172]
;;; /usr/lib64/libecl.so.13.5(cl_boot+0x87) [0x7f30c78dd377]
;;; /usr/lib64/python2.7/site-packages/sage/libs/ecl.so(+0x6c6c) [0x7f30c7d6dc6c]
;;; /usr/lib64/python2.7/site-packages/sage/libs/ecl.so(+0x6f98) [0x7f30c7d6df98]
;;; /usr/lib64/python2.7/site-packages/sage/libs/ecl.so(initecl+0x1781) [0x7f30c7d79961]
;;; /usr/lib64/libpython2.7.so.1.0(_PyImport_LoadDynamicModule+0x99) [0x7f3105fc4a39]
;;; /usr/lib64/libpython2.7.so.1.0(+0xefc29) [0x7f3105fc2c29]
;;; /usr/lib64/libpython2.7.so.1.0(+0xefe6d) [0x7f3105fc2e6d]
;;; /usr/lib64/libpython2.7.so.1.0(PyImport_ImportModuleLevel+0x188) [0x7f3105fc37d8]
;;; /usr/lib64/libpython2.7.so.1.0(+0xd792f) [0x7f3105faa92f]
;;; /usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43) [0x7f3105f1d593]
;;; /usr/lib64/libpython2.7.so.1.0(PyEval_CallObjectWithKeywords+0x47) [0x7f3105fac477]
;;; /usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0xf05) [0x7f3105fad965]
;;; /usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7dd) [0x7f3105fb251d]
;;; /usr/lib64/libpython2.7.so.1.0(PyEval_EvalCode+0x32) [0x7f3105fb2622]
;;; /usr/lib64/libpython2.7.so.1.0(PyImport_ExecCodeModuleEx+0x8c) [0x7f3105fc1d9c]
;;; /usr/lib64/libpython2.7.so.1.0(+0xef005) [0x7f3105fc2005]
;;; /usr/lib64/libpython2.7.so.1.0(+0xefc29) [0x7f3105fc2c29]
;;; /usr/lib64/libpython2.7.so.1.0(+0xefe6d) [0x7f3105fc2e6d]
Aborted
It also happens when I try to use the sum function with symbolic variables etc. The problem is not in ECLS per se, since maxima solves these things just fine.
I'm running Sage on Gentoo Linux (using the sage-on-gentoo overlay). I did various reinstalls of all my packages, also completely purged libecls, maxima, Sage and reinstalled them, but to no effect. I also tried installing all the relevant packages without threads support, nothing changed.
Does anyone have an idea what could cause this problem? Or what is even meant by the error? What file or directory isn't found?
