[new spkg, and patch, need review] Linbox static commentator make sage crash on PPC

[ClementPernet]

On Power PC, runing OS X, sage crashes at the start up, throwing a SIGBUS error.

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x057e3090
0x91219bb0 in std::ios_base::ios_base ()
(gdb) bt
#0  0x91219bb0 in std::ios_base::ios_base ()
#1  0x91226114 in std::basic_ios<char, std::char_traits<char> >::basic_ios ()
#2  0x91224490 in std::basic_ofstream<char, std::char_traits<char> >::basic_ofstream ()
#3  0x05ad4220 in LinBox::Commentator::Commentator ()
#4  0x05ad4458 in LinBox::Commentator::Commentator ()
#5  0x0576bfa4 in __static_initialization_and_destruction_0 ()
#6  0x0576c104 in global constructors keyed to _Z5powerI7IntegerlET_S1_T0_ ()
#7  0x8fe1376c in __dyld__ZN16ImageLoaderMachO18doModInitFunctionsERKN11ImageLoader11LinkContextE ()
#8  0x8fe0f180 in __dyld__ZN11ImageLoader23recursiveInitializationERKNS_11LinkContextEj ()
#9  0x8fe0f0d0 in __dyld__ZN11ImageLoader23recursiveInitializationERKNS_11LinkContextEj ()
#10 0x8fe0f2a4 in __dyld__ZN11ImageLoader15runInitializersERKNS_11LinkContextE ()
#11 0x8fe0c12c in __dyld_dlopen ()
#12 0x934d75a8 in dlopen ()
#13 0x000e0cac in _PyImport_GetDynLoadFunc ()
#14 0x000cda5c in _PyImport_LoadDynamicModule ()
#15 0x000cb7a8 in import_submodule ()
#16 0x000cba50 in load_next ()
#17 0x000cc1b8 in import_module_level ()
#18 0x000cc548 in PyImport_ImportModuleLevel ()
#19 0x000a3038 in builtin___import__ ()
#20 0x00009500 in PyObject_CallFunctionObjArgs ()
#21 0x000cc80c in PyImport_Import ()
#22 0x05529804 in __Pyx_ImportType (module_name=0x5541e8c "sage.libs.linbox.linbox", class_name=0x5541ea4 "Linbox_modn_dense", size=28) at sage/matrix/matrix_modn_dense.c:9435
#23 0x0553e5cc in initmatrix_modn_dense () at sage/matrix/matrix_modn_dense.c:8878

Component: linbox

Keywords: commentator static linbox

Issue created by migration from https://trac.sagemath.org/ticket/2463

[ClementPernet]

comment:1

William and I simply removed the static attribute to the instantiation of the null commentator (linbox/util/commentator.h:820), and this fixed the problem.

The new spkg is available at http://sage.math.washington.edu/home/pernet/linbox-1.1.5rc2.p3.spkg

[ClementPernet]

comment:2

Scratch that; disabling the static make everything brake (eg sage -t modsym/space.py). I am still working on it.

[ClementPernet]

comment:4

http://sage.math.washington.edu/home/pernet/linbox-1.1.5rc2.p4.spkg fixes it. Or more simply, the patch against linbox-1.1.5rc2.p2: http://sage.math.washington.edu/home/pernet/commentatorG5.patch

[85eec1a4-3d04-4b4d-b711-d4db03337c41]

comment:5

Merged in Sage 2.10.3.rc5