[Numpy-discussion] arraytypes.c : can't read descrs table

Joe Van Andel vanandel at atd.ucar.edu
Mon Apr 3 18:33:00 CDT 2000

Using Python 1.5.2, gcc 2.95.2 and Numeric CVS as of 4/3/2000 on Solaris
7 (Sparc).

When I attempt to import Numeric, I get a segmentation fault.  After
'multiarray'. '_numpy' and 'umath' are imported, the stack trace is:

#0  PyArray_DescrFromType (type=70) at Src/arraytypes.c:593
#1  0xfe768dd0 in PyArray_FromDims (nd=1, d=0xffbecfc8, type=70)
    at Src/arrayobject.c:416
#2  0xfe7952f0 in array_zeros (ignored=0x1, args=0x1)
    at Src/multiarraymodule.c:961
#3  0x1f72c in call_builtin (func=0xe6928, arg=0xedd40, kw=0x0) at
#4  0x1f5f8 in PyEval_CallObjectWithKeywords (func=0xe6928, arg=0xedd40, 
    kw=0x0) at ceval.c:2324
#5  0x1dde0 in eval_code2 (co=0xe7ec8, globals=0x0, locals=0x83, 
    args=0xffffffff, argcount=944424, kws=0x0, kwcount=0, defs=0x0, 
    defcount=0, owner=0x0) at ceval.c:1654
#6  0x1dc88 in eval_code2 (co=0xc9dc0, globals=0xfda98,
    args=0x1, argcount=1015296, kws=0x0, kwcount=0, defs=0xe6b2c,
    owner=0x0) at ceval.c:1612
#7  0x1dc88 in eval_code2 (co=0xf78f0, globals=0xfdc7c, locals=0x1,
    argcount=1014976, kws=0x0, kwcount=0, defs=0x0, defcount=0,
    at ceval.c:1612
#8  0x1b8a0 in PyEval_EvalCode (co=0xf78f0, globals=0xf0f70,
    at ceval.c:324
#9  0x277a8 in PyImport_ExecCodeModuleEx (name=0xffbede80 "Precision", 
"/usr/local/lib/python1.5/site-packages/Numeric/Precision.pyc") at

 gdb shows the fault right after line 596 in Src/arraytypes.c :

  if (type < PyArray_NTYPES) {
    return descrs[type];             # type = 'F'
  } else {
    switch(type) {
case 'c': return descrs[PyArray_CHAR];
case 'b': return descrs[PyArray_UBYTE];
case '1': return descrs[PyArray_SBYTE];
case 's': return descrs[PyArray_SHORT];
case 'i': return descrs[PyArray_INT];
case 'l': return descrs[PyArray_LONG];
case 'f': return descrs[PyArray_FLOAT];
case 'd': return descrs[PyArray_DOUBLE];
case 'F': return descrs[PyArray_CFLOAT];

If I try to examine
descrs[0], gdb says:

(gdb) print descrs[0]
Cannot access memory at address 0x0.

This is probably shared library weardness, but I'm not sure how to fix
it.  Any ideas?

Joe VanAndel  	          
National Center for Atmospheric Research
Internet: vanandel at ucar.edu

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