[Octave-bug-tracker] [bug #61788] arrays of type int16 contain wrong numbers

[Hartmut]

URL:
  <https://savannah.gnu.org/bugs/?61788>

                 Summary: arrays of type int16 contain wrong numbers
                 Project: GNU Octave
            Submitted by: hardy
            Submitted on: Mon 10 Jan 2022 09:03:35 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Regression
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 7.0.90
         Discussion Lock: Any
        Operating System: Any

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Details:

Here is a regression (I think) that I observed with the current Octave release
candidate 7.0.90. Run the following code:


a = int16 ( int16(-30000) : int16(30000) );
a(end) 


* in Octave 7.0.90 this gives 2767
* in Octave 6.3.0 this gives 30000
* in Online-Matlab (R2021b) this gives 30000

I have observed this under linux, but I think it will be the same for all
OS'ses. I found this by a failing BIST test in the image package.

I could not provoke this wrong behavior with the commonly used integer type
uint8, but maybe it happens also with other integer types and not only with
int16.




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