Error with 'int8'

[chuksyee]

I had compiled GraphBLAS-9.4.2 from source code with gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0.
When running the test suite "gbtest", the test fails at gbtest1 when it uses the type 'int8'. I tried running the gbtest1 manually by typing out each command at octave command-line as shown below. When I use type 'double' or 'uint8', it works fine. Would you know the reason for this error? Thanks for your help.

octave:4> rng ('default') ;
octave:5> X = 100 * sprand (3, 4, 0.4)
X =
Compressed Column Sparse (rows = 3, cols = 4, nnz = 5 [42%])

  (3, 2) -> 47.660
  (1, 3) -> 30.331
  (3, 3) -> 58.338
  (1, 4) -> 78.380
  (2, 4) -> 40.493

octave:6> m = 2 ;
octave:7> n = 3 ;
octave:8> A=GrB(X,'int8')
error:
error: called from
    GrB at line 630 column 30

[chuksyee]

I forgot to mention I was using octave-8.3.0.

[DrTimothyAldenDavis]

No idea. I don't maintain the Octave port, just the MATLAB one.

[chuksyee]

I saw this same error with Matlab.

[DrTimothyAldenDavis]

OK -- I will try to replicate it.

[DrTimothyAldenDavis]

I haven't been able to replicate this.

Can you try deleting your ~/.SuiteSparse folder? it might be stale. Also try rebuilding GraphBLAS from scratch, to see if that helps. If the problem persists, can you turn on the burble?

here is my output:

>> GrB.version

ans =

    '9.4.2 (Nov 18, 2024)'

>> rng ('default') ;
>> X = 100 * sprand (3, 4, 0.4)

X =

   (3,1)      95.7167
   (3,2)      48.5376
   (1,3)      15.7613
   (2,4)      97.0593
   (3,4)      80.0280

>> A=GrB(X,'int8')

A =

  3x4 GraphBLAS int8_t matrix, bitmap by col
  5 nonzeros, 5 entries, memory: 256 bytes

    (3,1)   96
    (3,2)   49
    (1,3)   16
    (2,4)   97
    (3,4)   80

>> GrB.burble(1)

ans =

     1

>> A=GrB(X,'int8')
 [ GxB_Matrix_pack_CSC 
   1.29e-05 sec ]
 [ GrB_apply (shallow-op) (sparse to bitmap) 
   0.000446 sec ]

A =
 [ GxB_Matrix_pack_BitmapC 
   8.11e-06 sec ]
 [ GrB_Matrix_nvals 
   9.54e-07 sec ]
 [ GxB_Matrix_pack_BitmapC 
   3.1e-06 sec ]
 (step1: 9.53674e-07 sec) (step2: 0 sec) (step3: 1.40667e-05 sec) (step4: 4.05312e-06 sec) (step5: 4.05312e-06 sec) [ GrB_assign (C iso assign) (pending: 0) Method 24: C = Z 
   9.92e-05 sec ]
 [ GrB_select (A bitmap) (iso select) (bitmap select) (sparse to hyper) 
   0.000138 sec ]
 [ GxB_unpack_HyperHash 
   0 sec ]
(iso export)  [ GxB_Matrix_pack_HyperCSC (iso import) 
   4.98e-05 sec ]
 [ GrB_Matrix_nvals 
   9.54e-07 sec ]
 [ GxB_Matrix_pack_BitmapC 
   1.91e-06 sec ]

  3x4 GraphBLAS int8_t matrix, bitmap by col
  5 nonzeros, 5 entries, memory: 256 bytes

    (3,1)   96
    (3,2)   49
    (1,3)   16
    (2,4)   97
    (3,4)   80

>>