[Octave-bug-tracker] [bug #59955] dlmwrite fails silently for variables larger than 2^31 elements

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?59955>

                 Summary: dlmwrite fails silently for variables larger than
2^31 elements
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 27 Jan 2021 05:18:28 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: dev
         Discussion Lock: Any
        Operating System: GNU/Linux

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Details:

This operation causes dlmwrite to write out a file that only has a single
comma separator with no data. There is no error message about size limits etc.
Perhaps dlmwrite can be made to reject variables larger than a certain size if
that's appropriate? This is on Octave 7.0.0 compiled with --enable-64 on
64-bit Linux.


foo = ones (121e6, 18, "uint8"); # larger than 2^31 elements, fails
dlmwrite ("myfilename", foo);


However dlmwrite does work for variables that are larger than 2^31 bytes as
long as they have fewer than 2^31 elements, e.g. a double array foo = ones
(16e6, 18).




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