[gnuastro-devel] [bug #51559] Arithmetic with one file and no operators

[Mohammad Akhlaghi]

URL:
  <http://savannah.gnu.org/bugs/?51559>

                 Summary: Arithmetic with one file and no operators
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Mon 24 Jul 2017 04:54:29 PM CEST
                Category: Arithmetic
                Severity: 3 - Normal
              Item Group: Crash
                  Status: In Progress
                 Privacy: Public
             Assigned to: makhlaghi
             Open/Closed: Open
         Discussion Lock: Any

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Details:

When Arithmetic is run with only one image and no operators it crashes. This
is because of the behavior we have defined for efficiency: an image is only
actually read into memory when it is ready to be operated on by an operator,
not when it is confronted. In this way, when processing a large number of
files, at any moment only the ones that are actually being operated on are in
memory.

So when there is no operator, the contents of the image are not read into
memory and we get a segmentation fault. I am now working on a solution to this
problem.

Cases like this (when there is only one file operand and no operator) can
happen in scripts.




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