[Octave-bug-tracker] [bug #55132] make check fail at sparse/bicg.m

[Leonardo]

URL:
  <https://savannah.gnu.org/bugs/?55132>

                 Summary: make check fail at sparse/bicg.m
                 Project: GNU Octave
            Submitted by: pocker
            Submitted on: Thu 29 Nov 2018 03:51:15 PM UTC
                Category: Configuration and Build System
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.4.1
        Operating System: GNU/Linux

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Details:

I don't know if this is a bug or not, nor where to report it.

I am running linux mint 19 (xfce) and I am trying to build and install octave
from source.
After a succeful "make" I did a "make check" and got the results:

PASS                            14924
  FAIL                                1
  XFAIL (reported bug)               35
  SKIP (missing feature)            127
  SKIP (run-time condition)          12


the "FAIL" was at sparse/bicg.m

results of bicg.m (extracted from fntests.log)

***** test
 ## unpreconditioned residual
 A = sparse (toeplitz ([2, 1, 0, 0, 0], [2, -1, 0, 0, 0]));
 b = sum (A, 2);
 M = magic (5);
 [x, flag, relres] = bicg (A, b, [], 2, M);
 assert (norm (b - A * x) / norm (b), 0, relres);
!!!!! test failed
ASSERT errors for:  assert (norm (b - A * x) / norm (b),0,relres)

  Location  |  Observed  |  Expected  |  Reason
     ()        0.85267         0         Abs err 0.85267 exceeds tol 0.85267
by 2e-16






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