[Octave-bug-tracker] [bug #55577] test in file-io.cc-tst fails on Octave 5.0.90 (only in GUI with run_test_suite)

[Hartmut]

URL:
  <https://savannah.gnu.org/bugs/?55577>

                 Summary: test in file-io.cc-tst fails on Octave 5.0.90 (only
in GUI with run_test_suite)
                 Project: GNU Octave
            Submitted by: hardy
            Submitted on: Fri 25 Jan 2019 09:46:19 PM UTC
                Category: Test Suite
                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: 5.0.90
        Operating System: GNU/Linux

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Details:

I have observed a failing test, when running "__run_test_suite__" in the
Octave GUI:

>>>>> processing
/opt/octave-5.0.90/share/octave/5.0.90/etc/tests/libinterp/corefcn/file-io.cc-tst
***** error textscan (single (40))
!!!!! error failed.
Expected an error, but got no error


I can only provoke this failing test when using the Octave GUI, and when using
the run_test_suite script. The test does NOT fail when
* doing "__run_test_suite__" in the Octave CLI (without Octave GUI)
* doing "make check" from the linux command line
* when running the individual test from within the Octave GUI several times,
like this:

for i = 1:30, disp(i), test
/opt/octave-5.0.90/share/octave/5.0.90/etc/tests/libinterp/corefcn/file-io.cc-tst
, endfor


Here are details what I did to get Octave and the failing test:
* Use Ubuntu 18.04 linux
* Download the current 5.0.90 tar ball alpha.gnu.org
* extract the tar content to /opt/octave-5.0.90
* ./configure --prefix=/opt/octave-5.0.90
* make -j 2
* make install
* ./run-octave --gui
* __run_test_suite__

I see this failing test every time I do this. It's not just on the second
round (like another fixed bug report on file-io.cc).




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